Abstract:
A projection optical unit images an object field in an image field. The projection optical unit includes a plurality of mirrors guides imaging light from the object field to the image field. At least two of the mirrors are arranged directly behind one another in the beam path of the imaging light for grazing incidence with an angle of incidence of the imaging light which is greater than 60°. This results in an imaging optical unit that can exhibit a well-corrected imageable field with, at the same time, a high imaging light throughput.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    The present application is a continuation of, and claims benefit under 35 USC 120 to, international application PCT/EP2014/066072, filed Jul. 25, 2014, which claims benefit under 35 USC 119 of German Application No. 10 2014 208 770.8, filed May 9, 2014, 10 2013 214 770.8, filed Jul. 29, 2013, and 10 2014 203 190.7, filed Feb. 21, 2014. The entire disclosure of international application PCT/EP2014/066072 is incorporated by reference herein. 
     
    
     FIELD 
       [0002]    The disclosure relates to a projection optical unit for imaging an object field into an image field. Furthermore, the disclosure relates to an optical system including such a projection optical unit, a projection exposure apparatus including such an optical system, a method for producing a microstructured or nanostructured component using such a projection exposure apparatus and a microstructured or nanostructured component produced by this method. 
       BACKGROUND 
       [0003]    Projection optical units are known from DE 10 2012 202 675 A1, DE 10 2009 011 328 A1, U.S. Pat. No. 8,027,022 B2 and U.S. Pat. No. 6,577,443 B2. An illumination optical unit for a projection exposure apparatus is known from DE 10 2009 045 096 A1. 
       SUMMARY 
       [0004]    The disclosure seeks to provide a projection optical unit which exhibits a well-corrected imageable field with, at the same time, a high imaging light throughput. 
         [0005]    In one aspect, the disclosure provides a projection optical unit for imaging an object field into an image field. The projection optical unit includes a plurality of mirrors for guiding imaging light from the object field to the image field. At least two of the mirrors are embodied as mirrors arranged directly behind one another in the beam path of the imaging light for grazing incidence with an angle of incidence of the imaging light which is greater than 60°. 
         [0006]    In one aspect, the disclosure provides projection optical unit for imaging an object field in an image field. The projection optical unit includes a plurality of mirrors for guiding imaging light from the object field to the image field. At least one mirror is embodied as a mirror for grazing incidence with an angle of incidence of the imaging light which is greater than 60°. The projection optical unit has two different imaging scales (βx, βy) in two different directions which span the image field. 
         [0007]    According to the disclosure, it was discovered that two mirrors, arranged directly behind one another, for grazing incidence within the projection optical unit lead to the possibility of designing a projection optical unit with a high imaging light throughput, which is uniform over the whole field to be imaged, wherein, also at the same time, degrees of freedom are provided for correcting the image in the image field via the mirrors with grazing incidence. 
         [0008]    The mirrors of the projection optical unit can carry the coatings which increase the imaging light reflectivity. Ruthenium and/or molybdenum can be used as coating materials for these coatings. 
         [0009]    The mirrors for grazing incidence can have a reflectivity which lies in the range between 75 and 95% and which, in particular, can be at least 80%. The mirrors for grazing incidence can have a reflectivity which depends linearly on the angle of incidence. Such a linear dependence can be compensated for by the use of at least one further mirror for grazing incidence, which likewise has a corresponding linear dependence of the reflectivity on the angle of incidence. The projection optical unit is suitable for EUV wavelengths of the imaging light, in particular in the range between 5 nm and 30 nm. The angle of incidence of the imaging light on the mirrors for grazing incidence can be greater than 65°, can be greater than 70°, can be greater than 72°, can be greater than 75°, can be greater than 80° or can also be greater than 85°. 
         [0010]    The projection optical unit can be embodied for imaging a portion of a reflecting reticle. To this end, a chief ray of a central object field point can include an angle with a normal of the object plane which is greater than 3° and for example equals 5.5°. 
         [0011]    One of the at least two mirrors for grazing incidence can be the first mirror of the projection optical unit downstream of the object field in the imaging beam path. The mirrors for grazing incidence can have reflection surfaces which deviate from a plane surface and can, in particular, have an image aberration-correcting surface form. The reflection surfaces of the mirrors for grazing incidence can be embodied as aspherical surfaces or else as free-form surfaces without rotational symmetry. 
         [0012]    An intermediate image plane can be arranged in the region of a reflection on a mirror for grazing incidence. This leads to an advantageous constriction of an imaging light beam in the region of the mirror for grazing incidence and therefore avoids the latter requiring an undesirably large reflection surface. 
         [0013]    The projection optical unit can be embodied as a catoptric optical unit. 
         [0014]    The projection optical unit can include at least one mirror with a passage opening for the illumination light. The projection optical unit can be embodied as an obscured optical unit. 
         [0015]    Alternatively, the projection optical unit can also be embodied in such a way that the reflection surfaces of all mirrors of the projection optical unit are used throughout. The projection optical unit can be embodied as a non-obscured optical unit. 
         [0016]    An x/y aspect ratio of a reflection surface optically impinged upon with illumination light, i.e. a used reflection surface, of at least one mirror of the projection optical unit can be less than 1, can be less than 0.8, can equal 0.7, can be less than 0.7, can be less than 0.6 and can equal 0.5. Here, the y-coordinate lies in a plane of incidence of the respectively observed mirror. The x-coordinate lies perpendicular to the plane of incidence of the respectively observed mirror. A scanning direction, in which an object to be imaged and/or a substrate, on which imaging takes place, is displaced, can also extend along the y-coordinate. 
         [0017]    An x/y aspect ratio of a reflection surface optically impinged upon with illumination light, i.e. a used reflection surface, of at least one mirror of the projection optical unit can be greater than 1, can equal 2, can be greater than 2, can equal 2.5, can be greater than 2.5, can be greater than 3, can be greater than 4, can be greater than 5, can be greater than 6, can equal 7.5, can be greater than 10 and can equal 15. 
         [0018]    The projection optical unit can have a sequence of mirrors in which, in addition to at least one GI mirror pair, i.e. two mirrors for grazing incidence arranged directly behind one another in the beam path, there is also a single GI mirror. The projection optical unit can have three successive GI mirrors. 
         [0019]    The projection optical unit can include at least one mirror which has the embodiment of a saddle surface, i.e. which has positive refractive power in one plane and negative refractive power in a plane perpendicular thereto. The projection optical unit can have a plurality of such saddle mirrors. 
         [0020]    In some embodiments, the projection optical unit includes exactly two mirrors for grazing incidence. Exactly two mirrors for grazing incidence were found to be particularly suitable for the projection optical unit. 
         [0021]    In some embodiments, an object plane in which the object field is arranged has an angle different from 0° with an image plane in which the image field is arranged. Such an angle between the object plane and the image plane enables a particularly compact guidance of the imaging light beam path or imaging beam path. This angle can be greater than 1°, can be greater than 2°, can be greater than 3°, can be greater than 5°, can be greater than 7°, can be greater than 10°, can be greater than 20°, can be greater than 30° and can equal 39°. 
         [0022]    In some embodiments, the projection optical unit includes exactly four mirrors for grazing incidence. Exactly four mirrors for grazing incidence were also found to be particularly suitable. 
         [0023]    In some embodiments, the four mirrors for grazing incidence are respectively, in a pairwise manner, arranged directly behind one another in the beam path of the imaging light. Such a pairwise arrangement of the mirrors for grazing incidence was found to be suitable for compensating an angle of incidence-dependent reflection. At least one mirror for normal incidence can lie between the pairs of mirrors for grazing incidence. The pairs of mirrors for grazing incidence can be arranged in such a way that a deflecting effect of the two mirrors arranged in succession is summed, i.e. that the angles of reflection are added. Such an embodiment enables a compensation of an angle of incidence-dependent reflectivity on the mirrors for grazing incidence. Alternatively, it is possible to assign to a mirror for grazing incidence a compensation mirror for grazing incidence at a different point in the beam path of the imaging light through the projection optical unit, wherein individual rays which are incident on the mirror for grazing incidence with a relatively large angle of incidence are accordingly incident on the compensation mirror with a smaller angle of incidence, and vice versa. A further mirror for grazing incidence and/or a mirror for normal incidence can be arranged between a mirror with grazing incidence and the compensation mirror assigned thereto. To the extent that more than two mirrors for grazing incidence are provided in the projection optical unit, the compensation effect of a compensation mirror may also apply to more than one of the other mirrors for grazing incidence. Thus, for example, in the case of the three mirrors for grazing incidence, it is possible to provide one compensation mirror for grazing incidence which compensates the angle of incidence dependence of the reflection for two further mirrors for grazing incidence. 
         [0024]    In some embodiments, the projection optical unit includes at least two mirrors for normal incidence with an angle of incidence of the imaging light which is less than 45°. Such embodiments were found to be particularly suitable for satisfying boundary conditions placed on a projection optical unit. The at least two mirrors for normal incidence can be impinged upon with an angle of incidence of the imaging light which is less than 40°, which is less than 35°, which is less than 30°, which is less than 25°, which is less than 20° and which can be even smaller. 
         [0025]    In some embodiments, the projection optical unit includes four mirrors for normal incidence with an angle of incidence of the imaging light which is less than 45°. Four mirrors for normal incidence lead to the option of a projection optical unit with particularly good image correction. 
         [0026]    An image-side numerical aperture of the projection optical unit can be at least 0.4 or 0.5 or 0.6. Such a projection optical unit enables a particularly high resolution. 
         [0027]    In some embodiments, the projection optical unit has an overall reflectivity, emerging as the product of the reflectivities of all mirrors of the projection optical unit, that is greater than 9%. Such an overall reflectivity of the projection optical unit can be 9.75%, can be greater than 10%, can be greater than 11%, can equal 11.97%, can be greater than 12% and can, in particular, equal 12.2%. Greater overall reflectivities are also possible, in particular depending on the embodiment of reflection-increasing coatings on the mirrors. 
         [0028]    In one aspect, the disclosure provides an EUV projection optical unit for imaging an object field in an image field. The EUV projection optical unit includes a plurality of mirrors for guiding imaging light from the object field to the image field. The EUV projection optical unit has an image-side numerical aperture of at least 0.4. An overall reflectivity of the projection optical unit, emerging as the product of the reflectivities of all mirrors of the projection optical unit is greater than 7%. Such an EUV projection optical unit disclosed herein simultaneously has a high structure resolution and a high throughput for the EUV imaging light. That is to say, little used light is lost during the projection, which in turn reduces an exposure duration and therefore increases the wafer throughput of a projection exposure apparatus equipped with such an EUV projection optical unit. The overall reflectivity can be greater than 8%, can be greater than 9%, can be greater than 10% or can be even greater. 
         [0029]    The anamorphic optical unit has different imaging scales for different field coordinates, in particular for orthogonal field coordinates. Here, an absolute reduction factor of the projection optical unit is referred to as imaging scale. By way of example, a projection optical unit reducing by a factor of 4 accordingly has an imaging scale of 4. Then, a larger imaging scale means that there is an increase in the reduction factor. Thus, within this meaning, a projection optical unit with a reduction by a factor of 8 has a larger imaging scale than a projection optical unit with a reduction by a factor of 4. 
         [0030]    The anamorphic optical unit can have a direction-dependent, i.e. field coordinate-dependent, object-side numerical aperture. 
         [0031]    It was identified that if the object-side numerical aperture increases, the object-side chief ray angle desirably is enlarged, possibly leading to shadowing effects by the absorber structure and to problems with the layer transmission, in particular to strong apodization effects by the reticle coating. It was identified further that, via an anamorphic imaging optical unit, in particular via an anamorphic imaging projection lens, a reticle with a predetermined size can be imaged from an object field with a predetermined imaging scale to a predetermined illumination field, wherein the illumination field is completely illuminated in the direction of the first imaging scale, while an increased imaging scale in a second direction does not have negative effect on the throughput of the projection exposure apparatus, but can be compensated for by suitable measures. 
         [0032]    Therefore, an anamorphic lens enables both the complete illumination of an image area with a large object-side numerical aperture in the first direction, without the extent of the imaging reticle needing to be enlarged in this first direction and without this resulting in a reduction in the throughput of the projection exposure apparatus, and also the minimization of the losses in imaging quality caused by the oblique incidence of the illumination light. 
         [0033]    As a result of having imaging scales with the same sign in the direction of the two principal sections, an image inversion (“image flip”) is avoided. The optical unit has positive imaging scales, in particular in the direction of the two principal sections. 
         [0034]    The anamorphic optical unit aids in the generation of an angle of incidence of the imaging light on a reflecting object, which angle of incidence is as small as possible. The larger object-side numerical aperture can be present perpendicular to the incidence plane of the imaging light on the object. The use of a cylindrical optical unit is not mandatory for configuring the anamorphic optical unit. The different imaging scales can have a positive sign for both field coordinates. The different imaging scales can have reducing effect for both field coordinates. The anamorphic projection optical unit can have an elliptical entrance pupil and/or an elliptical exit pupil. The anamorphic projection optical unit can have a rotationally symmetric and an n-fold rotationally symmetric exit pupil. The different imaging scales for the orthogonal field coordinates can differ by at least a factor of 1.1, at least by a factor of 1.2, at least by a factor of 1.3, at least by a factor of 1.4, at least by a factor of 1.5, at least by a factor of 1.7, at least by a factor of 2, at least by a factor of 2.5 and at least by a factor of 3 or else by an even larger factor. 
         [0035]    The object field can have an xy-aspect ratio of greater than 1, wherein the different imaging scales of the projection optical unit are present in the directions of these two object field dimensions (x, y) of this aspect ratio. A reducing imaging scale (βx) in a longer object field dimension (x) is smaller than in a shorter object field dimension (y) perpendicular thereto. A projection objective can have a direction-dependent object-side numerical aperture. The advantages of such embodiments correspond to what was already discussed above. A smaller imaging scale is tantamount to a smaller reducing effect. 
         [0036]    The smaller one (βx) of the two different imaging scales can be less than 6. The larger one (βy) of the two imaging scales can be at least 6. Such imaging scales were found to be particularly suitable. By way of example, the smaller one of the two different imaging scales can be 5.4, can be less than 5, can equal 4 or can be even smaller. The larger one of the two different imaging scales can equal 7, can equal 8 or can be even larger. 
         [0037]    At least one of the mirrors can have a reflection surface in the form of a free-form surface. Such a mirror reflection surface enables an extension to the design degrees of freedom for the projection optical unit. In particular, an anamorphic effect can be distributed on a plurality of mirror surfaces. 
         [0038]    An image-side numerical aperture can be at least 0.4, such as at least 0.5. An object-side chief ray angle (CRAO) for the field center point of less than 7°, wherein the image field has an extent of more than 13 mm, such as more than 20 mm, along a field dimension (x). Such numerical apertures and image field dimensions are well adapted to desirable properties with respect to the imaging quality and the wafer exposure during use in a projection exposure apparatus. 
         [0039]    The projection optical unit can have an aperture stop. This aperture stop can lie in a plane or else have a three-dimensional embodiment. The extent of the aperture stop can be smaller in the scanning direction than perpendicular thereto. 
         [0040]    The projection optical unit can have an obscuration stop. What was explained above in respect of the aperture stop applies in respect of the embodiment of the obscuration stop. 
         [0041]    A projection optical unit can include a stop with a stop edge, the extent of which along a shorter object field dimension (y) is smaller than along a longer object field dimension (x). Such a stop with an extent ratio is adapted to the anamorphic effect of the projection optical unit. The stop can be arranged in an entrance pupil plane of the projection optical unit. The ratio of the extent along the shorter object field dimension and along the longer object field dimensioned can correspond to the ratio of the reducing imaging scales in the longer object field dimension and in the shorter object field dimension. 
         [0042]    The features discussed above with reference to the various projection optical units can be realized in any combination with one another. 
         [0043]    The advantages of an optical system having a stop with a stop edge, the extent of which along a shorter object field dimension (y) is smaller than along a longer object field dimension (x), correspond to those which were already explained above with reference to the projection optical unit. To the extent that use is made of an anamorphic projection optical unit, the illumination optical unit can be adapted to a non-rotationally symmetric entrance pupil of the projection optical unit. 
         [0044]    The advantages of the projection optical unit are particularly pronounced in an optical system that contains a projection optical unit as disclosed herein. A possible operating wavelength for the EUV light source can be 13.5 nm. Alternatively, use can also be made of a DUV light source, that is to say, for example, a light source with a wavelength of 193 nm. 
         [0045]    An projection exposure apparatus can include an illumination optical unit for illuminating the object field with illumination and imaging light. The advantages of such a projection exposure apparatus correspond to those which were already explained above with reference to the projection optical unit. 
         [0046]    An apparatus can have advantages of the anamorphic projection optical unit. 
         [0047]    A reticle for a projection exposure apparatus described herein can have an extent of at least 104 mm×132 mm. 
         [0048]    The advantages of a production method and of a microstructured or nanostructured component can correspond to those which were already explained above with reference to the projection optical unit and the optical system and the projection exposure apparatus. 
         [0049]    The projection exposure apparatus can be used to produce, in particular, a semiconductor component, for example a memory chip. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0050]    Exemplary embodiments of the disclosure are explained in detail below on the basis of the drawing. In the latter: 
           [0051]      FIG. 1  schematically shows a projection exposure apparatus for EUV microlithography; 
           [0052]      FIG. 2  shows, in a meridional section, an embodiment of an imaging optical unit which can be used as a projection lens in the projection exposure apparatus according to  FIG. 1 , wherein an imaging beam path for chief rays and for an upper and a lower coma ray of two selected field points is depicted; 
           [0053]      FIGS. 3 to 13  respectively show, in an illustration similar to  FIG. 2 , further embodiments of an imaging optical unit which can be used as a projection lens in the projection exposure apparatus according to  FIG. 1 ; 
           [0054]      FIG. 14  shows, in an illustration similar to  FIG. 2 , a further embodiment of an imaging optical unit which can be used as a projection lens in the projection exposure apparatus according to  FIG. 1 , with a curved field and divergent chief rays emanating from the object field; 
           [0055]      FIG. 15  shows a view of the imaging optical unit according to  FIG. 14 , seen from the viewing direction XV in  FIG. 14 ; 
           [0056]      FIG. 15A  shows views of edge contours of optically used surfaces of the mirrors of the imaging optical unit according to  FIGS. 14 and 15 ; 
           [0057]      FIG. 16  shows, in an illustration similar to  FIG. 2 , a further embodiment of an imaging optical unit which can be used as a projection lens in the projection exposure apparatus according to  FIG. 1 ; 
           [0058]      FIG. 17  shows a view of the imaging optical unit according to  FIG. 16 , seen from the viewing direction XVII in  FIG. 16 ; 
           [0059]      FIG. 18  shows, in an illustration similar to  FIG. 2 , a further embodiment of an imaging optical unit which can be used as a projection lens in the projection exposure apparatus according to  FIG. 1 ; 
           [0060]      FIG. 19  shows a view of the imaging optical unit according to  FIG. 18 , seen from the viewing direction XIX in  FIG. 18 ; 
           [0061]      FIG. 20  shows, in an illustration similar to  FIG. 2 , a further embodiment of an imaging optical unit which can be used as a projection lens in the projection exposure apparatus according to  FIG. 1 , configured as an anamorphic optical unit; 
           [0062]      FIG. 21  shows a view of the imaging optical unit according to  FIG. 20 , seen from the viewing direction XXI in  FIG. 20 ; 
           [0063]      FIG. 21A  shows views of edge contours of optically used surfaces of the mirrors of the imaging optical unit according to  FIGS. 20 and 21 ; 
           [0064]      FIG. 22  shows, in an illustration similar to  FIG. 2 , a further embodiment of an imaging optical unit which can be used as a projection lens in the projection exposure apparatus according to  FIG. 1 , configured as an anamorphic optical unit; 
           [0065]      FIG. 23  shows a view of the imaging optical unit according to  FIG. 22 , seen from the viewing direction XXIII in  FIG. 22 ; 
           [0066]      FIG. 24  shows, in an illustration similar to  FIG. 2 , a further embodiment of an imaging optical unit which can be used as a projection lens in the projection exposure apparatus according to  FIG. 1 , configured as an anamorphic optical unit; 
           [0067]      FIG. 25  shows a view of the imaging optical unit according to  FIG. 24 , seen from the viewing direction XXV in  FIG. 24 ; 
           [0068]      FIG. 26  shows, in an illustration similar to  FIG. 2 , a further embodiment of an imaging optical unit which can be used as a projection lens in the projection exposure apparatus according to  FIG. 1 , configured as an anamorphic optical unit without pupil obscuration; and 
           [0069]      FIG. 27  shows a view of the imaging optical unit according to  FIG. 26 , seen from the viewing direction XXVII in  FIG. 26 . 
       
    
    
     DETAILED DESCRIPTION 
       [0070]    A microlithographic projection exposure apparatus  1  includes a light source  2  for illumination light or imaging light  3 . The light source  2  is an EUV light source which generates light in a wavelength range of, for example, between 5 nm and 30 nm, in particular between 5 nm and 15 nm. In particular, the light source  2  can be a light source with a wavelength of 13.5 nm or a light source with a wavelength of 6.9 nm. Other EUV wavelengths are also possible. In general, any desired wavelengths, for example visible wavelengths or else other wavelengths which can find use in microlithography (e.g. DUV, vacuum ultraviolet) and for which suitable laser light sources and/or LED light sources are available (for example 365 nm, 248 nm, 193 nm, 157 nm, 129 nm, 109 nm), are also possible for the illumination light  3  guided in the projection exposure apparatus  1 . A beam path of the illumination light  3  is depicted very schematically in  FIG. 1 . 
         [0071]    An illumination optical unit  6  serves for guiding the illumination light  3  from the light source  2  to an object field  4  in an object plane  5 . Using a projection optical unit or imaging optical unit  7 , the object field  4  is imaged in an image field  8  in an image plane  9  with a predetermined reduction scale. 
         [0072]    In order to simplify the description of the projection exposure apparatus  1  and the various embodiments of the projection optical unit  7 , a Cartesian xyz-coordinate system is specified in the drawing, from which the respective positional relations between the components depicted in the figures emerge. In  FIG. 1 , the x-direction extends perpendicular to the plane of the drawing and into the latter. The y-direction extends to the left and the z-direction extends upward. 
         [0073]    The object field  4  and the image field  8  are rectangular. Alternatively, it is also possible for the object field  4  and image field  8  to be embodied with a bend or curvature, that is to say, in particular, in the form of a partial ring. The object field  4  and the image field  8  have an xy-aspect ratio of greater than 1. Thus, the object field  4  has a longer object field dimension in the x-direction and a shorter object field dimension in the y-direction. These object field dimensions extend along the field coordinates x and y. 
         [0074]    One of the exemplary embodiments depicted in  FIG. 2   ff . can be used for the projection optical unit  7 . The projection optical unit  7  according to  FIG. 2  has a reduction factor of 8. Other reduction scales are also possible, for example 4×, 5×, or else reduction scales which are greater than 8×. In the embodiments according to  FIGS. 2 and 5   ff ., the image plane  9  in the projection optical unit  7  is arranged parallel to the object plane  5 . What is depicted here is a section of a reflection mask  10 , which is also referred to as reticle, coinciding with the object field  4 . The reticle  10  is carried by a reticle holder  10   a . The reticle holder  10   a  is displaced by a reticle displacement drive  10   b . The imaging by the projection optical unit  7  is carried out on the surface of a substrate  11  in the form of a wafer, which is carried by a substrate holder  12 . The substrate holder  12  is displaced by a wafer or substrate displacement drive  12   a.    
         [0075]    Between the reticle  10  and the projection optical unit  7 , a beam  13  of illumination light  3  entering the latter is schematically depicted in  FIG. 1 , as is, between the projection optical unit  7  and the substrate  11 , a beam  14  of the illumination light  3  emerging from the projection optical unit  7 . An image field-side numerical aperture (NA) of the projection optical unit  7  is not reproduced to scale in  FIG. 1 . 
         [0076]    The projection exposure apparatus  1  is a scanner-type apparatus. During operation of the projection exposure apparatus  1 , both the reticle  10  and the substrate  11  are scanned in the y-direction. A stepper-type projection exposure apparatus  1 , in which there is a step-by-step displacement of the reticle  10  and the substrate  11  in the y-direction between individual exposures of the substrate  11 , is also possible. These displacements are synchronized to one another by appropriate actuation of the displacement drives  10   b  and  12   a.    
         [0077]      FIG. 2  shows the optical design of a first embodiment of the projection optical unit  7 . Depicted in  FIG. 2  is the beam path of in each case three individual rays  15 , which emanate from two object field points that are spaced apart from one another in the y-direction in  FIG. 2 . Chief rays  16 , i.e. individual rays  15  which extend through the center of a pupil in a pupil plane of the projection optical unit  7 , and in each case an upper and a lower coma ray of these two object field points are depicted. Proceeding from the object field  4 , the chief rays  16  include an angle CRAO of 5.5° with a normal of the object plane  5 . 
         [0078]    The object plane  5  lies parallel to the image plane  9 . 
         [0079]    The projection optical unit  7  has an image-side numerical aperture of 0.45. 
         [0080]    The projection optical unit  7  has a reducing imaging scale of 8×. 
         [0081]    The projection optical unit  7  according to  FIG. 2  has a total of eight mirrors which, in the sequence of the beam path of the individual rays  15  emanating from the object field  4 , are numbered M 1  to M 8  in sequence. An imaging optical unit  7  can also have different number of mirrors, for example four mirrors or six mirrors. 
         [0082]      FIG. 2  depicts the calculated reflection surfaces of the mirrors M 1  to M 8 . As can be seen from the illustration according to  FIG. 2 , only a portion of these calculated reflection surfaces is used. Only this actually used region of the reflection surfaces is in fact present in the real mirrors M 1  to M 8 . These used reflection surfaces are carried by mirror bodies in a manner known per se. 
         [0083]    In the projection optical unit  7  according to  FIG. 2 , the mirrors M 1 , M 4 , M 7  and M 8  are embodied as mirrors for normal incidence, that is to say as mirrors on which the imaging light  3  is incident with an angle of incidence that is smaller than 45°. Thus, the projection optical unit  7  according to  FIG. 2  has a total of four mirrors M 1 , M 4 , M 7  and M 8  for normal incidence. 
         [0084]    The mirrors M 2 , M 3 , M 5  and M 6  are mirrors for grazing incidence of the illumination light  3 , that is to say mirrors on which the illumination light  3  is incident with angles of incidence which are greater than 60°. A typical angle of incidence of the individual rays  15  of the imaging light  3  on the mirrors M 2 , M 3  and M 5 , M 6  for grazing incidence lies in the region of 80°. Overall, the projection optical unit  7  according to  FIG. 2  includes exactly four mirrors M 2 , M 3 , M 5  and M 6  for grazing incidence. 
         [0085]    The mirrors M 2  and M 3  form a mirror pair arranged directly behind one another in the beam path of the imaging light  3 . The mirrors M 5  and M 6  also form a mirror pair arranged directly behind one another in the beam path of the imaging light  3 . 
         [0086]    The mirror pairs M 2 , M 3  on the one hand and M 5 , M 6  on the other hand reflect the imaging light  3  in such a way that the angles of reflection of the individual rays  15  on the respective mirrors M 2 , M 3  or M 5 , M 6  of these two mirror pairs add up. Thus, the respective second mirror M 3  and M 6  of the respective mirror pair M 2 , M 3  and M 5 , M 6  amplifies a deflecting effect exerted by the respectively first mirror M 2 , M 5  on the respective individual ray  15 . This arrangement of the mirrors of the mirror pairs M 2 , M 3  and M 5 , M 6  corresponds to the one described in DE 10 2009 045 096 A1 for an illumination optical unit. 
         [0087]    The mirrors M 2 , M 3 , M 5  and M 6  for grazing incidence in each case have very large absolute values for the radius, i.e. have a relatively small deviation from a plane surface. These mirrors M 2 , M 3 , M 5  and M 6  for grazing incidence therefore have practically no optical power, i.e. practically no overall beam-forming effect like a concave or convex mirror, but contribute to specific and, in particular, to local aberration correction. 
         [0088]    In order to characterize a deflecting effect of the mirrors of the projection optical unit  7 , a deflection direction is defined in the following text on the basis of the respectively depicted meridional sections. As is seen in the respectively incident beam direction in the meridional section, for example according to  FIG. 2 , a deflecting effect of the respective mirror in the clockwise direction, i.e. a deflection to the right, is denoted by the abbreviation “R”. By way of example, the mirror M 1  of the projection optical unit  7  has such an “R” deflecting effect. A deflecting effect of a mirror in the counterclockwise direction, i.e. to the left, as seen from the respective beam direction incident on this mirror, is denoted by the abbreviation “L”. The mirrors M 2  and M 3  of the projection optical unit  7  are examples for the “L” deflecting effect. A weakly deflecting effect or an entirely non-deflecting effect of a mirror with a fold angle f, for which −1°&lt;f&lt;1° applies, is denoted by the abbreviation “0”. The mirror M 7  of the projection optical unit  7  is an example for the “0” deflecting effect. Overall, the projection optical unit  7  for the mirrors M 1  to M 8  has the following sequence of deflecting effects: RLLLRROL. 
         [0089]    In principle, all described exemplary embodiments of the projection optical units can be mirrored about a plane extending parallel to the xz-plane, without basic imaging properties changing in this case. However, of course, this changes the sequence of the deflecting effects, which for example in the case of a projection optical unit emerging from the projection optical unit  7  by the corresponding mirroring has the following sequence: LRRRLLOR. 
         [0090]    A selection of the deflection effect, i.e. a selection of a direction of the respective incident beam, for example on the mirror M 4 , and a selection of a deflection direction of the mirror pairs M 2 , M 3  and M 5 , M 6  is selected in such a way in each case that an installation space available for the projection optical unit  7  is used efficiently. 
         [0091]    The mirrors M 1  to M 8  carry a coating optimizing the reflectivity of the mirrors M 1  to M 8  for the imaging light  3 . This can be a ruthenium coating, a molybdenum coating or a molybdenum coating with an uppermost layer of ruthenium. In the mirrors M 2 , M 3 , M 5  and M 6  for grazing incidence, use can be made of a coating with e.g. a ply made of molybdenum or ruthenium. These highly reflecting layers, in particular of mirrors M 1 , M 4 , M 7  and M 8  for normal incidence, can be embodied as multi-ply layers, wherein successive layers can be manufactured from different materials. Use can also be made of alternating material layers. A typical multi-ply layer can include 50 bi-plies made of in each case a layer of molybdenum and a layer of silicon. 
         [0092]    In order to calculate an overall reflectivity of the projection optical unit  7 , a system transmission is calculated as follows: a mirror reflectivity is determined on each mirror surface depending on the angle of incidence of a guide ray, i.e. a chief ray of a central object field point, and combined by multiplication to form the system transmission. 
         [0093]    Here, the reflectivity R M  on the mirror in percent emerges as: 
         [0000]        R   M   =c 0 x   4   +c 1 x   3   +c 2 x   2   +c 3 x+c 4, 
         [0000]    where x denotes the respective angle of incidence in degrees. The coefficients ci emerge from: 
         [0000]        ci= ½( ei   s-fit   +ci   P-fit ),
 
         [0000]    as mean values of the respective coefficients for S-polarization on the one hand and the P-polarization on the other hand. 
         [0094]    For an angle of incidence range between 60°&lt;x&lt;88°, the following coefficients emerge for a ruthenium layer, which is therefore impinged upon under grazing incidence angles: 
         [0000]    
       
         
               
               
               
               
               
               
             
               
               
               
               
               
               
             
           
               
                   
                   
               
               
                   
                 c0 
                 c1 
                 c2 
                 c3 
                 C4 
               
               
                   
                   
               
             
             
               
                   
               
             
          
           
               
                 S-Fit 
                 0 
                 1.59347283 × 10 −3   
                 −4.06503596 × 10 −1   
                 3.56423129 × 10 1   
                 −9.76664971 × 10 2   
               
               
                 P-Fit 
                 0 
                 1.88179657 × 10 −3   
                 −4.79626971 × 10 −1   
                 4.20429269 × 10 1   
                 −1.17059654 × 10 3   
               
               
                   
               
             
          
         
       
     
         [0095]    For NI mirrors, i.e. in the region of the perpendicular incidence, the following emerges for a molybdenum/silicon multi-ply stack: 
         [0000]    
       
         
               
               
               
               
               
               
             
               
               
               
               
               
               
             
           
               
                   
                   
               
               
                   
                 c0 
                 c1 
                 c2 
                 c3 
                 C4 
               
               
                   
                   
               
             
             
               
                   
               
             
          
           
               
                 S-Fit 
                 2.89135870 × 10 −6   
                 −3.90173053 × 10 −4   
                  1.04448085 × 10 −2   
                 −2.65742974 × 10 −2   
                 6.66009436 × 10 1   
               
               
                 P-Fit 
                 2.05886567 × 10 −5   
                  5.79240629 × 10 −4   
                 −3.37849733 × 10 −2   
                  3.92206533 × 10 −2   
                 6.65307365 × 10 1   
               
               
                   
               
             
          
         
       
     
         [0096]    Further information in respect of a reflection on a GI mirror (mirror for grazing incidence) is found in WO 2012/126867 A. Further information in respect of the reflectivity of NI mirrors (normal incidence mirrors) is found in DE 101 55 711 A. 
         [0097]    An overall reflectivity or system transmission of the projection optical unit  7 , emerging as a product of the reflectivities of all mirrors M 1  to M 8  of the projection optical unit  7 , is R=10.43%. 
         [0098]    The mirror M 8 , i.e. the last mirror in the imaging beam path in front of the image field  8 , has a passage opening  17  for the imaging light  3 , which is reflected from the antepenultimate mirror M 6  to the penultimate mirror M 7 , to pass through. The mirror M 8  is used in a reflective manner around the passage opening  17 . None of the other mirrors M 1  to M 7  have passage openings and the mirrors are used in a reflective manner in a continuous region without gaps. 
         [0099]    The mirrors M 1  to M 8  are embodied as free-form surfaces which cannot be described by a rotationally symmetric function. Other embodiments of the projection optical unit  7 , in which at least one of the mirrors M 1  to M 8  is embodied as a rotationally symmetric asphere, are also possible. It is also possible for all mirrors M 1  to M 8  to be embodied as such aspheres. 
         [0100]    A free-form surface can be described by the following free-form surface equation (Equation 1): 
         [0000]    
       
         
           
             
               
                 
                   Z 
                   = 
                   
                     
                       
                         
                           
                             c 
                             x 
                           
                            
                           
                             x 
                             2 
                           
                         
                         + 
                         
                           
                             c 
                             Y 
                           
                            
                           
                             y 
                             2 
                           
                         
                       
                       
                         1 
                         + 
                         
                           
                             1 
                             - 
                             
                               
                                 ( 
                                 
                                   1 
                                   + 
                                   
                                     k 
                                     x 
                                   
                                 
                                 ) 
                               
                                
                               
                                 
                                   ( 
                                   
                                     
                                       c 
                                       x 
                                     
                                      
                                     x 
                                   
                                   ) 
                                 
                                 2 
                               
                             
                             - 
                             
                               
                                 ( 
                                 
                                   1 
                                   + 
                                   
                                     k 
                                     y 
                                   
                                 
                                 ) 
                               
                                
                               
                                 
                                   ( 
                                   
                                     
                                       c 
                                       y 
                                     
                                      
                                     y 
                                   
                                   ) 
                                 
                                 2 
                               
                             
                           
                         
                       
                     
                     + 
                     
                       
                         C 
                         1 
                       
                        
                       x 
                     
                     + 
                     
                       
                         C 
                         2 
                       
                        
                       y 
                     
                     + 
                     
                       
                         C 
                         3 
                       
                        
                       
                         x 
                         2 
                       
                     
                     + 
                     
                       
                         C 
                         4 
                       
                        
                       xy 
                     
                     + 
                     
                       
                         C 
                         5 
                       
                        
                       
                         y 
                         2 
                       
                     
                     + 
                     
                       
                         C 
                         6 
                       
                        
                       
                         x 
                         3 
                       
                     
                     + 
                     … 
                     + 
                     
                       
                         C 
                         9 
                       
                        
                       
                         y 
                         3 
                       
                     
                     + 
                     
                       
                         C 
                         10 
                       
                        
                       
                         x 
                         4 
                       
                     
                     + 
                     … 
                     + 
                     
                       
                         C 
                         12 
                       
                        
                       
                         x 
                         2 
                       
                        
                       
                         y 
                         2 
                       
                     
                     + 
                     … 
                     + 
                     
                       
                         C 
                         14 
                       
                        
                       
                         y 
                         4 
                       
                     
                     + 
                     
                       
                         C 
                         15 
                       
                        
                       
                         x 
                         5 
                       
                     
                     + 
                     
                         
                     
                      
                     … 
                     + 
                     
                         
                       
                         
                           
                             C 
                             20 
                           
                            
                           
                             y 
                             5 
                           
                         
                         + 
                         
                           
                             C 
                             21 
                           
                            
                           
                             x 
                             6 
                           
                         
                         + 
                         … 
                         + 
                         
                           
                             C 
                             24 
                           
                            
                           
                             x 
                             3 
                           
                            
                           
                             y 
                             3 
                           
                         
                         + 
                         … 
                         + 
                         
                           
                             C 
                             27 
                           
                            
                           
                             y 
                             6 
                           
                         
                         + 
                         … 
                       
                     
                   
                 
               
               
                 
                   ( 
                   1 
                   ) 
                 
               
             
           
         
       
     
         [0101]    The following applies to the parameters of this Equation (1): 
         [0102]    Z is the sag of the free-form surface at the point x, y, where x 2 +y 2 =r 2 . Here, r is the distance from the reference axis of the free-form surface equation (x=0; y=0). 
         [0103]    In the free-form surface equation (1), C 1 , C 2 , C 3  . . . denote the coefficients of the free-form surface series expansion in powers of x and y. 
         [0104]    In the case of a conical base area, c x , c y  is a constant corresponding to the vertex curvature of a corresponding asphere. Thus, c x =1/R x  and c y =1/R y  applies. Here, k x  and k y  each corresponds to a conical constant of a corresponding asphere. Thus, Equation (1) describes a bi-conical free-form surface. 
         [0105]    An alternative possible free-form surface can be generated from a rotationally symmetric reference surface. Such free-form surfaces for reflection surfaces of the mirrors of projection optical units of microlithographic projection exposure apparatuses are known from US 2007-0058269 A1. 
         [0106]    Alternatively, free-form surfaces can also be described with the aid of two-dimensional spline surfaces. Examples for this are Bezier curves or non-uniform rational basis splines (NURBS). By way of example, two-dimensional spline surfaces can be described by a grid of points in an xy-plane and associated z-values, or by these points and the gradients associated therewith. Depending on the respective type of the spline surface, the complete surface is obtained by interpolation between the grid points using e.g. polynomials or functions which have specific properties in respect of the continuity and the differentiability thereof. Examples for this are analytical functions. 
         [0107]    The optical design data of the reflection surfaces of the mirrors M 1  to M 8  of the projection optical unit  7  can be gathered from the following tables. These optical design data in each case proceed from the image plane  9 , i.e. describe the respective projection optical unit in the reverse propagation direction of the imaging light  3  between the image plane  9  and the object plane  5 . 
         [0108]    The first one of these tables provides an overview of the design data of the projection optical unit  7  and summarizes the numerical aperture NA, the calculated design wavelength for the imaging light, the dimensions of the image field in the x- and y-direction, an image field curvature and a location of a stop. This curvature is defined as the inverse radius of curvature of the field. 
         [0109]    The second one of these tables specifies vertex radii (Radius_x=R x , Radius_y=R y ) and refractive power values (Power_x, Power_y) for the optical surfaces of the optical components. Negative values for the radius mean concave curves towards the incident illumination light  3  in the section of the respective surface with the observed plane (xz, yz), which is spanned by a surface normal at the vertex with the respective direction of curvature (x, y). The two radii Radius_x, Radius_y can explicitly have different signs. 
         [0110]    The vertices at each optical surface are defined as points of incidence of a guide ray which extends from an object field center to the image field  8  along a plane of symmetry x=0, i.e. the plane of the drawing of  FIG. 2  (meridional plane). 
         [0111]    The refractive powers Power_x(P x ), Power_y(P y ) at the vertices are defined as: 
         [0000]    
       
         
           
             
               P 
               x 
             
             = 
             
               - 
               
                 
                   2 
                    
                   
                       
                   
                    
                   cos 
                    
                   
                       
                   
                    
                   A 
                    
                   
                       
                   
                    
                   O 
                    
                   
                       
                   
                    
                   I 
                 
                 
                   R 
                   x 
                 
               
             
           
         
       
       
         
           
             
               P 
               y 
             
             = 
             
               - 
               
                 2 
                 
                   
                     R 
                     y 
                   
                    
                   cos 
                    
                   
                       
                   
                    
                   A 
                    
                   
                       
                   
                    
                   O 
                    
                   
                       
                   
                    
                   I 
                 
               
             
           
         
       
     
         [0112]    Here, AOI denotes an angle of incidence of the guide ray in relation to the surface normal. 
         [0113]    The third table specifies, for the mirrors M 1  to M 8  in mm, the conical constants k x  and k y , the vertex radius R x  (=Radius_x) and the free-form surface coefficients C n . Coefficients C n  not found in the table in each case have the value of 0. 
         [0114]    The fourth table still specifies the magnitude along which the respective mirror, proceeding from a reference surface, was decentered (DCY) in the y-direction, and displaced (DCZ) and tilted (TLA, TLC) in the z-direction. This corresponds to a parallel displacement and a tilt when carrying out the free-form surface design method. Here, a displacement is carried out in the y-direction and in the z-direction in mm, and tilting is carried out about the x-axis and about the z-axis. Here, the tilt angle is specified in degrees. Decentering is carried out first, followed by tilting. The reference surface during decentering is in each case the first surface of the specified optical design data. Decentering in the y-direction and in the z-direction is also specified for the object field  4 . In addition to the surfaces assigned to the individual mirrors, the fourth table also lists the image plane as first surface, the object plane as last surface and possibly a stop surface (denoted by “stop”). 
         [0115]    The fifth table still specifies the transmission data of the mirrors M 8  to M 1 , namely the reflectivity thereof for the angle of incidence of an illumination light ray incident centrally on the respective mirror. The overall transmission is specified as a proportional factor remaining from an incident intensity after reflection at all mirrors in the projection optical unit. 
         [0116]    The sixth table specifies an edge of the stop (surface M 8 ) as a polygonal chain in local xyz coordinates. This stop is arranged at the location of the mirror M 8 . The stop is, as is described above, decentered and tilted. 
         [0000]    
       
         
               
               
               
             
               
               
               
               
             
               
               
               
             
           
               
                 TABLE 1 for FIG. 2 
               
               
                   
               
               
                   
                 Exemplary embodiment 
                 FIG. 2 
               
               
                   
               
             
             
               
                   
                 NA 
                 0.45 
               
             
          
           
               
                   
                 Wavelength 
                 13.5 
                 nm 
               
               
                   
                 Field dimension x 
                 13.0 
                 mm 
               
               
                   
                 Field dimension y 
                 0.784 
                 mm 
               
               
                   
                 Feldkruemmung 
                 0.0 
                 1/mm 
               
             
          
           
               
                   
                 Stop 
                 M8 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
               
               
             
               
               
               
               
               
               
             
           
               
                 TABLE 2 for FIG. 2 
               
               
                   
               
               
                 Surface 
                 Radius x[mm] 
                 Power x[1/mm] 
                 Radius y[mm] 
                 Power y[1/mm] 
                 Operating 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 M8 
                 −837.70881927 
                 0.00236862 
                 −757.27364908 
                 0.00266207 
                 REFL 
               
               
                 M7 
                 2488.10131627 
                 −0.00080383 
                 283.66314157 
                 −0.00705062 
                 REFL 
               
               
                 M6 
                 4560.51860808 
                 −0.00007268 
                 18476.28162004 
                 −0.00065317 
                 REFL 
               
               
                 M5 
                 −2531.38864214 
                 0.00014365 
                 — 
                 0.00010672 
                 REFL 
               
               
                 M4 
                 −2528.42598018 
                 0.00077816 
                 −1442.81510027 
                 0.00140906 
                 REFL 
               
               
                 M3 
                 −3050.65046824 
                 0.00012933 
                 34435.31193357 
                 −0.00029442 
                 REFL 
               
               
                 M2 
                 — 
                 0.00000156 
                 −40926.79441369 
                 0.00032129 
                 REFL 
               
               
                 M1 
                 10833.49940461 
                 −0.00017328 
                 −2578.14093233 
                 0.00082650 
                 REFL 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
             
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 3A 
               
             
             
               
                   
               
               
                 for Figure 2 
               
             
          
           
               
                 Coefficient 
                 M8 
                 M7 
                 M6 
               
               
                   
               
             
          
           
               
                 KY 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 KX 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 RX 
                 −837.70881930 
                 2488.10131600  
                 4560.51860800 
               
               
                 C7  
                 −9.0132308e−09 
                 1.11394243e−06  
                 1.59114264e−07 
               
               
                 C9  
                 −1.00251209e−09 
                 2.8860992e−07  
                 5.59843391e−09 
               
               
                 C10 
                 −8.87226228e−12 
                 1.18917173e−09 
                 3.83909581e−10 
               
               
                 C12 
                 −5.08519375e−11 
                 5.23800849e−09 
                 2.11857784e−10 
               
               
                 C14 
                 −1.88200773e−11 
                 1.0734105e−08  
                 1.39463766e−11 
               
               
                 C16 
                 8.82521632e−15 
                 3.75808998e−12 
                 1.70877645e−12 
               
               
                 C18 
                 −4.19864966e−15 
                 1.85595295e−11 
                 2.66118623e−13 
               
               
                 C20 
                 −2.11360234e−16 
                 −1.72133449e−11 
                 −5.17043474e−14 
               
               
                 C21 
                 −3.19874264e−17 
                 3.00011227e−15  
                 9.63300464e−16 
               
               
                 C23 
                 −1.22217908e−16 
                 4.11542089e−14  
                 4.38089836e−15 
               
               
                 C25 
                 −1.30026191e−16 
                 1.11642164e−13  
                 1.61278968e−15 
               
               
                 C27 
                 −3.67400697e−17 
                 3.22598292e−13  
                 1.26838989e−16 
               
               
                 C29 
                 1.14026692e−20 
                 2.92869138e−17  
                 6.77960834e−18 
               
               
                 C31 
                 1.0918839e−20 
                 1.69415114e−16  
                 −5.39777251e−19 
               
               
                 C33 
                 −3.04462195e−21 
                 4.33073361e−16 
                 7.8861342e−19 
               
               
                 C35 
                 1.02259135e−22 
                 −7.37362073e−16 
                 8.03098684e−19 
               
               
                 C36 
                 −5.63440362e−23 
                 1.44942891e−20  
                 −3.90732961e−21 
               
               
                 C38 
                 −2.66622412e−22 
                 3.05621193e−19  
                 5.15318073e−20 
               
               
                 C40 
                 −4.32156525e−22 
                 1.34609812e−18  
                 −9.54272183e−21 
               
               
                 C42 
                 −2.89279412e−22 
                 2.45287597e−18  
                 −1.70492308e−20 
               
               
                 C44 
                 −5.99684085e−23 
                 2.12868884e−18 
                 −9.72311004e−22 
               
               
                 C46 
                 1.18076072e−26  
                 2.0799062e−22  
                 1.45427907e−22 
               
               
                 C48 
                 3.74881822e−26 
                 2.68414652e−21  
                 4.40689789e−22 
               
               
                 C50 
                 1.18386812e−26  
                 5.8670912e−21  
                 2.04987221e−22 
               
               
                 C52 
                 −1.00050188e−26 
                 −2.33431824e−20 
                 −7.75365541e−24 
               
               
                 C54 
                 −2.93462929e−27 
                 −9.59894302e−20 
                 −3.00655786e−24 
               
               
                 C55 
                 −7.12926517e−29 
                 3.05798066e−25 
                 2.33655571e−25 
               
               
                 C57 
                 −3.54266327e−28 
                 2.94896726e−24 
                 7.55277402e−25 
               
               
                 C59 
                 −7.81684172e−28 
                 2.54027973e−23 
                 1.26094736e−24 
               
               
                 C61 
                 −8.38095482e−28 
                 8.05342131e−23 
                 6.93792966e−25 
               
               
                 C63 
                 −4.13760156e−28 
                 1.24219439e−22 
                 9.28250781e−26 
               
               
                 C65 
                 −7.30815611e−29 
                 4.10221778e−22 
                 5.47302487e−27 
               
               
                 C67 
                 1.94837068e−32 
                 0 
                 0 
               
               
                 C69 
                 1.1397448e−31 
                 0 
                 0 
               
               
                 C71 
                 1.34382689e−31 
                 0 
                 0 
               
               
                 C73 
                 7.55966183e−32  
                 0 
                 0 
               
               
                 C75  
                 1.56253375e−32  
                 0 
                 0 
               
               
                 C77  
                 6.40963088e−33  
                 0 
                 0 
               
               
                 C78  
                 −2.56297737e−34 
                 0 
                 0 
               
               
                 C80  
                 −1.60836013e−33 
                 0 
                 0 
               
               
                 C82  
                 −4.69716941e−33 
                 0 
                 0 
               
               
                 C84  
                 −7.07121378e−33 
                 0 
                 0 
               
               
                 C86  
                 −5.64664272e−33 
                 0 
                 0 
               
               
                 C88  
                 −2.27265225e−33 
                 0 
                 0 
               
               
                 C90  
                 −3.58207435e−34 
                 0 
                 0 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
             
               
               
               
               
             
           
               
                 TABLE 3b 
               
             
             
               
                   
               
               
                 for FIG. 2 
               
             
          
           
               
                 Coefficient 
                 M5 
                 M4 
                 M3 
               
               
                   
               
               
                 KY 
                   0.00000000 
                   0.00000000 
                   0.00000000 
               
               
                 KX 
                   0.00000000 
                   0.00000000 
                   0.00000000 
               
               
                 RX 
                 −2531.38864200 
                 −2528.42598000  
                 −3050.65046800 
               
               
                 C7 
                  1.72781637e−07 
                  5.8018765e−08 
                 −1.17466046e−07 
               
               
                 C9 
                  2.14254527e−08 
                  8.64375408e−09 
                  9.52322648e−09 
               
               
                 C10 
                  1.91545596e−10 
                 −1.94203172e−11 
                  6.38336565e−11 
               
               
                 C12 
                 −1.30545965e−10 
                  7.93780161e−11 
                 −6.09437242e−11 
               
               
                 C14 
                  2.29647138e−11 
                 −4.96311207e−10 
                 −8.46825762e−11 
               
               
                 C16 
                 −2.76920045e−13 
                  −4.9519671e−14 
                  2.46570227e−13 
               
               
                 C18 
                  6.31392082e−14 
                  1.46606283e−12 
                  1.83720452e−13 
               
               
                 C20 
                  5.5820243e−14 
                  1.34097025e−11 
                 −5.79539787e−14 
               
               
                 C21 
                 −7.00730308e−18  
                  8.53806243e−18 
                 −1.75797003e−16 
               
               
                 C23 
                  3.41967082e−16 
                 −9.95579358e−16 
                  6.08596054e−16 
               
               
                 C25 
                 −7.70078483e−17 
                  −1.1212914e−14 
                  3.41532358e−16 
               
               
                 C27 
                  1.30566647e−16 
                 −5.35527612e−14 
                  9.88490631e−17 
               
               
                 C29 
                  1.16112452e−19 
                  2.57671697e−19 
                 −1.20254031e−18 
               
               
                 C31 
                 −1.62253585e−19 
                 −3.25217486e−18 
                  6.21318065e−19 
               
               
                 C33 
                 −1.22964972e−19 
                 −2.40795277e−16 
                  1.66737236e−19 
               
               
                 C35 
                  1.96436668e−19 
                 −4.04068886e−15 
                  1.33042899e−18 
               
               
                 C36 
                  5.2349042e−22 
                  −3.5496978e−23 
                  6.42079101e−22 
               
               
                 C38 
                 −3.65302727e−22 
                  1.66117198e−21 
                 −2.85312334e−21 
               
               
                 C40 
                  6.2340516e−23 
                  3.47327568e−20 
                  −6.3375684e−22 
               
               
                 C42 
                  9.80519303e−22 
                  −1.2946755e−18 
                 −2.67858747e−21 
               
               
                 C44 
                  −7.581399e−22 
                  −4.6332565e−17 
                  1.89160718e−21 
               
               
                 C46 
                  −2.8051662e−24 
                 −2.53096392e−25 
                  2.79819801e−24 
               
               
                 C48 
                 −8.01335569e−25 
                  3.13587836e−24 
                 −1.95559965e−24 
               
               
                 C50 
                 −2.19615172e−24 
                  5.29262773e−22 
                 −3.25009825e−24 
               
               
                 C52 
                  2.6523186e−24 
                  8.72077688e−21 
                 −1.69895932e−23 
               
               
                 C54 
                 −3.17905172e−24 
                 −1.40950195e−19 
                 −1.24591949e−23 
               
               
                 C55 
                  1.31200881e−28 
                  6.31299438e−31 
                  2.44903332e−28 
               
               
                 C57 
                  6.46975253e−27 
                 −1.44337304e−27 
                  5.45604256e−27 
               
               
                 C59 
                  4.4689247e−27 
                  −9.7439448e−26 
                  2.50408571e−27 
               
               
                 C61 
                 −1.34855282e−27 
                 −4.38554687e−25 
                 −5.44576542e−27 
               
               
                 C63 
                 −6.32570305e−27 
                  4.90510476e−23 
                 −3.43807004e−26 
               
               
                 C65 
                 −2.36233819e−27 
                  1.11019478e−22 
                 −3.46588884e−26 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
             
               
               
               
               
             
           
               
                 TABLE 3c 
               
             
             
               
                   
               
               
                 for FIG. 2 
               
             
          
           
               
                   
                 Coefficient 
                 M2 
                 M1 
               
               
                   
                   
               
               
                   
                 KY 
                    0.00000000 
                   0.00000000 
               
               
                   
                 KX 
                    0.00000000 
                   0.00000000 
               
               
                   
                 RX 
                 −194394.06400000 
                 10833.49940000 
               
               
                   
                 C7 
                  −8.67070075e−09 
                  1.48981967e−09 
               
               
                   
                 C9 
                  −1.03403364e−08 
                  4.14892815e−09 
               
               
                   
                 C10 
                  −8.56886085e−11  
                  3.38149986e−11 
               
               
                   
                 C12 
                  −2.01940344e−11 
                  3.90955095e−11 
               
               
                   
                 C14 
                  −7.15883437e−12 
                  1.45830047e−11 
               
               
                   
                 C16 
                  −9.60210917e−14 
                 −6.21111216e−14 
               
               
                   
                 C18 
                  −2.38815926e−14 
                  9.39500532e−14 
               
               
                   
                 C20 
                  −6.65065222e−16 
                  1.68138883e−13 
               
               
                   
                 C21 
                  −2.55749187e−16 
                  1.57821571e−17 
               
               
                   
                 C23 
                  −1.09151386e−16 
                 −3.38914384e−17 
               
               
                   
                 C25 
                  −1.97294475e−17 
                  7.9460803e−18 
               
               
                   
                 C27 
                  5.70404899e−18 
                  1.16530683e−15 
               
               
                   
                 C29 
                  1.06431723e−19 
                  5.16374316e−19 
               
               
                   
                 C31 
                  −1.64115075e−19 
                 −1.22836084e−19 
               
               
                   
                 C33 
                  −1.35411374e−20 
                 −1.90495661e−18 
               
               
                   
                 C35 
                   7.628521e−21 
                  4.76002684e−18 
               
               
                   
                 C36 
                  7.25331258e−22 
                  1.07417031e−21 
               
               
                   
                 C38 
                  −4.73496575e−22 
                  4.76896118e−22 
               
               
                   
                 C40 
                  −2.11297656e−22 
                 −1.10250035e−21 
               
               
                   
                 C42 
                  −1.02753056e−23 
                 −8.66116391e−21 
               
               
                   
                 C44 
                  5.07988503e−24 
                 −1.22722218e−20 
               
               
                   
                 C46 
                  −9.35932524e−25 
                 −6.27142618e−24 
               
               
                   
                 C48 
                  −2.7783366e−25 
                 −8.01178971e−24 
               
               
                   
                 C50 
                  −1.59026041e−25 
                 −3.05243873e−23 
               
               
                   
                 C52 
                  −6.53452661e−27 
                  2.93392122e−23 
               
               
                   
                 C54 
                   1.824705e−27 
                 −8.82506065e−23 
               
               
                   
                 C55 
                  2.29320351e−27 
                 −6.20705864e−26 
               
               
                   
                 C57 
                  4.07644119e−27 
                 −1.36210254e−26 
               
               
                   
                 C59 
                  −1.98759397e−28 
                 −6.17708439e−26 
               
               
                   
                 C61 
                  −4.48732119e−29 
                 −1.10303922e−25 
               
               
                   
                 C63 
                  −1.85722793e−30 
                  1.36969417e−25 
               
               
                   
                 C65 
                  2.81372879e−31 
                 −1.05691239e−25 
               
               
                   
                   
               
             
          
         
       
     
         [0000]    
       
         
               
             
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 4a 
               
             
             
               
                   
               
               
                 for FIG. 2 
               
             
          
           
               
                 Surface 
                 DCX 
                 DCY 
                 DCZ 
               
               
                   
               
             
          
           
               
                 Image plane 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 M8 
                 0.00000000 
                 0.00000000 
                 724.00020000 
               
               
                 M7 
                 0.00000000  
                 −156.29867133 
                 95.23660203 
               
               
                 M6 
                 0.00000000 
                 69.24296301 
                 1002.51687199 
               
               
                 M5 
                 0.00000000 
                 376.70486973  
                 1458.55105482 
               
               
                 M4 
                 0.00000000 
                 768.07202185 
                 1679.06041506 
               
               
                 M3 
                 0.00000000 
                 −418.87445828 
                 1388.75512246 
               
               
                 M2 
                 −0.00000000 
                 −951.87794696 
                 999.51576030 
               
               
                 M1 
                 −0.00000000 
                 −1732.87150302 
                 29.24804987 
               
               
                 Object plane 
                 −0.00000000 
                 −1870.89265468 
                 1987.57585464 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
             
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 4b 
               
             
             
               
                   
               
               
                 for FIG. 2 
               
             
          
           
               
                 Surface 
                 TLA[deg] 
                 TLB[deg] 
                 TLC[deg] 
               
               
                   
               
             
          
           
               
                 Image plane 
                 −0.00000000 
                 0.00000000 
                 −0.00000000 
               
               
                 M8 
                 −7.20360764 
                 0.00000000 
                 −0.00000000 
               
               
                 M7 
                 164.56899679 
                 0.00000000 
                 −0.00000000 
               
               
                 M6 
                 66.01183481 
                 −0.00000000  
                 180.00000000 
               
               
                 M5 
                 46.01183481 
                 0.00000000 
                 0.00000000 
               
               
                 M4 
                 −66.46601090 
                 0.00000000 
                 −0.00000000 
               
               
                 M3 
                 26.13973836 
                 −0.00000000 
                 180.00000000 
               
               
                 M2 
                 46.13973836 
                 0.00000000 
                 −0.00000000 
               
               
                 M1 
                 164.11964399 
                 0.00000000 
                 0.00000000 
               
               
                 Object plane 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 5 for FIG. 2 
               
               
                   
               
               
                   
                 Surface 
                 Angle of incidence [deg] 
                 Reflectivity 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                   
                 M8 
                 7.20360764 
                 0.66017316 
               
               
                   
                 M7 
                 0.00000627 
                 0.66565840 
               
               
                   
                 M6 
                 80.46059205 
                 0.88430204 
               
               
                   
                 M5 
                 79.52462332 
                 0.87198912 
               
               
                   
                 M4 
                 10.34002306 
                 0.65386862 
               
               
                   
                 M3 
                 78.62259485 
                 0.85965098 
               
               
                   
                 M2 
                 81.25157420 
                 0.89438137 
               
               
                   
                 M1 
                 20.18260294 
                 0.61248770 
               
               
                   
                 Overall transmission 
                   
                 0.1043 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
             
               
               
               
             
           
               
                 TABLE 6 for FIG. 2 
               
               
                   
               
               
                 X[mm] 
                 Y[mm] 
                 Z[mm] 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 0.00000000 
                 320.37449215 
                 −71.38743287 
               
               
                 48.36574379 
                 316.80745936 
                 −71.27476399 
               
               
                 95.79913948 
                 306.15249000 
                 −70.94768730 
               
               
                 141.36313519 
                 288.55110075 
                 −70.43891500 
               
               
                 184.11362993 
                 264.24936742 
                 −69.80243066 
               
               
                 223.10205565 
                 233.61232523 
                 −69.11179911 
               
               
                 257.38560926 
                 197.14179980 
                 −68.45633706 
               
               
                 286.04752607 
                 155.49451794 
                 −67.93434999 
               
               
                 308.22857191 
                 109.49597859 
                 −67.64324197 
               
               
                 323.16872022 
                 60.14481518 
                 −67.66726101 
               
               
                 330.25516914 
                 8.60292360 
                 −68.06468586 
               
               
                 329.07035438 
                 −43.83122398 
                 −68.85697088 
               
               
                 319.43251774 
                 −95.76530795 
                 −70.02235741 
               
               
                 301.42236387 
                 −145.76769643 
                 −71.49560404 
               
               
                 275.39215543 
                 −192.42726762 
                 −73.17404386 
               
               
                 241.95716406 
                 −234.41168219 
                 −74.92871123 
               
               
                 201.97236169 
                 −270.51874890 
                 −76.61837302 
               
               
                 156.49875437 
                 −299.71790154 
                 −78.10418339 
               
               
                 106.76380494 
                 −321.18109072 
                 −79.26314903 
               
               
                 54.11946362 
                 −334.30400997 
                 −79.99924341 
               
               
                 0.00000000 
                 −338.71937192 
                 −80.25155891 
               
               
                 −54.11946362 
                 −334.30400997 
                 −79.99924341 
               
               
                 −106.76380494 
                 −321.18109072 
                 −79.26314903 
               
               
                 −156.49875437 
                 −299.71790154 
                 −78.10418339 
               
               
                 −201.97236169 
                 −270.51874890 
                 −76.61837302 
               
               
                 −241.95716406 
                 −234.41168219 
                 −74.92871123 
               
               
                 −275.39215543 
                 −192.42726762 
                 −73.17404386 
               
               
                 −301.42236387 
                 −145.76769643 
                 −71.49560404 
               
               
                 −319.43251774 
                 −95.76530795 
                 −70.02235741 
               
               
                 −329.07035438 
                 −43.83122398 
                 −68.85697088 
               
               
                 −330.25516914 
                 8.60292360 
                 −68.06468586 
               
               
                 −323.16872022 
                 60.14481518 
                 −67.66726101 
               
               
                 −308.22857191 
                 109.49597859 
                 −67.64324197 
               
               
                 −286.04752607 
                 155.49451794 
                 −67.93434999 
               
               
                 −257.38560926 
                 197.14179980 
                 −68.45633706 
               
               
                 −223.10205565 
                 233.61232523 
                 −69.11179911 
               
               
                 −184.11362993 
                 264.24936742 
                 −69.80243066 
               
               
                 −141.36313519 
                 288.55110075 
                 −70.43891500 
               
               
                 −95.79913948 
                 306.15249000 
                 −70.94768730 
               
               
                 −48.36574379 
                 316.80745936 
                 −71.27476399 
               
               
                   
               
             
          
         
       
     
         [0117]    An overall reflectivity of the projection optical unit  7  is 10.43%. 
         [0118]    The mirrors M 1  to M 7  are free-form surfaces, in which the free-from surface expansion goes at most to the tenth power of x and y. In the mirror M 8 , this expansion continues to the twelfth power of x and y. 
         [0119]    The axes of rotation symmetry of the aspherical mirrors are generally tilted with respect to a normal of the image plane  9 , as is made clear by the tilt values in the tables. 
         [0120]    The mirrors M 1 , M 2 , M 4 , M 5  and M 8  have negative values for the radius, i.e. are, in principle, concave mirrors. The mirrors M 3 , M 6  and M 7  have positive values for the radius, i.e. are, in principle, convex mirrors. The mirrors M 2 , M 3 , M 5  and M 6  have very large absolute radii, i.e. only constitute small deviations from plane reflection surfaces. The image field  8  has an x-extent of two times 6.5 mm and a y-extent of 1 mm. The projection optical unit  7  is optimized for an operating wavelength of the illumination light  3  of 13.5 nm. 
         [0121]    A first pupil plane  18  is arranged between the mirrors M 2  and M 3  in the beam path of the imaging light  3 . Unlike what is schematically depicted in  FIG. 2 , the first pupil plane  18  is tilted relative to the chief ray of a central field point, i.e. it includes an angle of 90° with this chief ray. The whole beam of the imaging light  3  is accessible from all sides in the region of the pupil plane  18  between the mirrors M 2  and M 3 . Therefore, an aperture stop can be arranged in the region of the pupil plane  18 . In the following text, this stop is also denoted by the reference sign  18 . Alternatively or additionally, it is possible, as explained above in conjunction with Table 6 for  FIG. 2 , for the stop also to be arranged on the mirror M 8 . 
         [0122]    An edge of a stop surface of the stop (cf —also Table 6 for  FIG. 2 ) emerges from intersection points on the stop surface of all rays of the illumination light  3  which, on the image side, propagate at the field center point in the direction of the stop surface with a complete image-side telecentric aperture. When the stop  18  is embodied as an aperture stop, the edge is an inner edge. 
         [0123]    The stop  18  can lie in a plane or else have a three-dimensional embodiment. The extent of the stop  18  can be smaller in the scanning direction (y) than in the cross-scanning direction (x). 
         [0124]    An intermediate image  19  of the projection optical unit  7  is arranged in the imaging beam path between the mirrors M 3  and M 4 . 
         [0125]    A further pupil plane of the projection optical unit  7  is arranged in the region of the reflection of the imaging light  3  on the mirrors M 7  and M 8 . Aperture stops in the region of the mirrors M 7  and M 8  can be arranged distributed for the x-dimension, on the one hand, and for the y-direction, on the other hand, at two positions in the imaging beam path, for example there can be an aperture stop for primarily providing a restriction along the y-dimension on the mirror M 8  and an aperture stop primarily providing a restriction along the x-dimension on the mirror M 7 . 
         [0126]    An installation length of the projection optical unit  7  in the z-direction, i.e. a distance between the object plane  5  and the image plane  9 , is approximately 2000 mm. The mirror M 8  has a diameter lying in the region of 650 mm. A y-distance d OIS  between a central object field point and a central image field point is 1870 mm. 
         [0127]    The projection optical unit  7  has a scanned RMS value of the wavefront aberration which is less than 5 to 10 mλ. The distortion of the projection optical unit  7  is less than 0.12 nm. A telecentricity value of the projection optical unit  7 , measured in the x-direction over the image field  8 , is less than 6 mrad. A telecentricity value of the projection optical unit  7 , measured in the y-direction over the image field  8 , is less than 0.4 mrad. 
         [0128]    The projection optical unit  7  is approximately telecentric on the image side. 
         [0129]    A working distance between the mirror M 7  closest to the image field and the image field  8  is 78 mm. 
         [0130]    Less than 15% of the numerical aperture is obscured due to the passage opening  17 . The obscuration edge is constructed analogously to the way the stop edge is constructed, as explained above in conjunction with the stop  18 . When embodied as an obscuration stop, the edge is an outer edge of the stop. In a system pupil of the projection optical unit  7 , a surface which cannot be illuminated due to the obscuration is less than 0.15 2  of the surface of the overall system pupil. The non-illuminated surface within the system pupil can have a different extent in the x-direction than in the y-direction. The non-illuminated surface in the system pupil can be round, elliptical, square or rectangular. Moreover, this surface in the system pupil which cannot be illuminated can be decentered in the x-direction and/or in the y-direction in relation to a center of the system pupil. 
         [0131]    A further embodiment of a projection optical unit  20 , which can be used in the projection exposure apparatus  1  according to  FIG. 1  instead of the projection optical unit  7 , is explained in the following text on the basis of  FIG. 3 . Components and functions which were already explained above in the context of  FIGS. 1 and 2  are appropriately denoted by the same reference signs and are not discussed again in detail. 
         [0132]    The mirrors M 1  to M 6  are once again embodied as free-form surface mirrors, for which the free-form surface equation (1) specified above applies. The optical design data of the projection optical unit  20  can be gathered from the following tables, which in terms of their design correspond to the tables in respect of the projection optical unit  7  according to  FIG. 2 . 
         [0000]    
       
         
               
               
               
             
               
               
               
               
             
               
               
               
             
           
               
                 TABLE 1 for FIG. 3 
               
               
                   
               
               
                   
                 Exemplary embodiment 
                 FIG. 3 
               
               
                   
               
             
             
               
                   
                 NA 
                 0.45 
               
             
          
           
               
                   
                 Wavelength 
                 13.5 
                 nm 
               
               
                   
                 Field dimension x 
                 13.0 
                 mm 
               
               
                   
                 Field dimension y 
                 0.784 
                 mm 
               
               
                   
                 Feldkruemmung 
                 0.0 
                 1/mm 
               
             
          
           
               
                   
                 Stop 
                 M6 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
               
               
             
               
               
               
               
               
               
             
           
               
                 TABLE 2 for FIG. 3 
               
               
                   
               
               
                 Surface 
                 Radius_x[mm] 
                 Power_x[1/mm] 
                 Radius_y[mm] 
                 Power_y[1/mm] 
                 Operating 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 M6 
                 −1404.14350601 
                 0.00142436 
                 −1309.12297977 
                 0.00152774 
                 REFL 
               
               
                 M5 
                 5382.39322209 
                 −0.00037158 
                 2573.23597524 
                 −0.00077723 
                 REFL 
               
               
                 M4 
                 1869.70984553 
                 −0.00105007 
                 1245.12728595 
                 −0.00163626 
                 REFL 
               
               
                 M3 
                 −5275.63794156 
                 0.00036040 
                 −2876.86701766 
                 0.00073127 
                 REFL 
               
               
                 M2 
                 — 
                 0.00002889 
                 117297.48607361 
                 −0.00007065 
                 REFL 
               
               
                 M1 
                 — 
                 0.00000889 
                 −59894.00868988 
                 0.00018903 
                 REFL 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
             
               
               
               
               
             
           
               
                 TABLE 3a 
               
             
             
               
                   
               
               
                 for FIG. 3 
               
             
          
           
               
                 Coefficient 
                 M6 
                 M5 
                 M4 
               
               
                   
               
               
                 KY 
                   0.00000000 
                   0.00000000 
                   0.00000000 
               
               
                 KX 
                   0.00000000 
                   0.00000000 
                   0.00000000 
               
               
                 RX 
                 −1404.14350600 
                 5382.39322200 
                 1869.70984600 
               
               
                 C7 
                  2.03330045e−08 
                  2.3344482e−07 
                  7.23054695e−07 
               
               
                 C9 
                  4.65863782e−09 
                  1.18051932e−07 
                  1.24097017e−06 
               
               
                 C10 
                 −7.84668249e−12 
                  1.62577951e−10 
                  1.87744351e−10 
               
               
                 C12 
                  −1.7637487e−11 
                  5.87834308e−10 
                  8.29505595e−10 
               
               
                 C14 
                 −6.18838343e−12 
                  2.5617744e−10 
                  3.12998874e−09 
               
               
                 C16 
                  9.06006234e−15 
                  2.50004118e−13 
                  9.06901063e−13 
               
               
                 C18 
                  1.02692539e−14 
                  4.14837589e−13 
                  1.32517565e−12 
               
               
                 C20 
                  4.29131815e−15 
                  2.84090337e−13 
                  1.73975885e−11 
               
               
                 C21 
                 −5.55421623e−18 
                  1.40965954e−16 
                  5.47388002e−16 
               
               
                 C23 
                 −1.88026398e−17 
                  9.40416055e−16 
                  1.58311459e−15 
               
               
                 C25 
                 −1.54749472e−17 
                  8.25709315e−16 
                  2.17853503e−14 
               
               
                 C27 
                 −4.79448181e−18 
                  5.01235176e−16 
                  8.48825036e−14 
               
               
                 C29 
                  4.15266197e−21 
                  3.91907237e−19 
                  2.95779995e−18 
               
               
                 C31 
                  8.9008726e−21 
                  1.24932564e−18 
                 −9.00584397e−18 
               
               
                 C33 
                  8.90593911e−21 
                  1.73719878e−18 
                  1.70412678e−16 
               
               
                 C35 
                  3.09195946e−21 
                  9.75392684e−19 
                  3.3318325e−16 
               
               
                 C36 
                 −3.35220532e−24 
                  1.95464646e−22 
                 −2.10907241e−21 
               
               
                 C38 
                 −1.54416412e−23 
                  1.95489479e−21 
                 −3.54137492e−20 
               
               
                 C40 
                  −2.0112602e−23 
                  2.59845192e−21 
                  7.5377104e−20 
               
               
                 C42 
                 −1.26210611e−23 
                  3.18819744e−21 
                  1.25792108e−18 
               
               
                 C44 
                 −3.17245779e−24 
                  1.20046993e−21 
                  2.21018136e−18 
               
               
                 C46 
                  2.57983572e−27 
                  1.17913803e−24 
                 −1.59573436e−23 
               
               
                 C48 
                  9.18263006e−27 
                  6.27728863e−24 
                  7.54265613e−23 
               
               
                 C50 
                  1.41039202e−26 
                  1.17489615e−23 
                  3.92042663e−21 
               
               
                 C52 
                  6.68942097e−27 
                  5.23414869e−24 
                  9.85615328e−21 
               
               
                 C54 
                  1.98073687e−28 
                 −3.40518909e−24 
                  1.56979448e−20 
               
               
                 C55 
                 −1.54418379e−30 
                  2.82069597e−28 
                  7.73972202e−26 
               
               
                 C57 
                 −7.38488366e−30 
                   4.3385682e−27 
                  1.18049046e−24 
               
               
                 C59 
                 −1.24334052e−29 
                  1.31986693e−26 
                  7.47854689e−24 
               
               
                 C61 
                 −1.45721166e−29 
                  2.79892262e−26 
                  2.8778736e−23 
               
               
                 C63 
                 −8.46049004e−30 
                  1.43392203e−26 
                  4.2065804e−23 
               
               
                 C65 
                 −1.46997251e−30 
                  2.39797376e−27 
                  5.84041106e−23 
               
               
                 C67 
                  1.37077767e−33 
                   0 
                   0 
               
               
                 C69 
                  5.96198912e−33 
                   0 
                   0 
               
               
                 C71 
                  1.01109499e−32 
                   0 
                   0 
               
               
                 C73 
                  6.86378346e−33 
                   0 
                   0 
               
               
                 C75 
                  1.49095714e−33 
                   0 
                   0 
               
               
                 C77 
                 −9.91986177e−34 
                   0 
                   0 
               
               
                 C78 
                 −1.55332549e−36 
                   0 
                   0 
               
               
                 C80 
                 −1.18750127e−35 
                   0 
                   0 
               
               
                 C82 
                  −3.4522721e−35 
                   0 
                   0 
               
               
                 C84 
                 −4.95083176e−35 
                   0 
                   0 
               
               
                 C86 
                  −3.9770171e−35 
                   0 
                   0 
               
               
                 C88 
                 −1.77881031e−35 
                   0 
                   0 
               
               
                 C90 
                  −4.7556972e−36 
                   0 
                   0 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
             
               
               
               
               
             
           
               
                 TABLE 3b 
               
             
             
               
                   
               
               
                 for FIG. 3 
               
             
          
           
               
                 Coefficient 
                 M3 
                 M2 
                 M1 
               
               
                   
               
               
                 KY 
                   0.00000000 
                    0.00000000 
                    0.00000000 
               
               
                 KX 
                   0.00000000 
                    0.00000000 
                    0.00000000 
               
               
                 RX 
                 −5275.63794200 
                 −16708.20815000 
                 −39723.46084000 
               
               
                 C7 
                  8.64742859e−08 
                 −8.48534383e−09 
                 −2.08763509e−08 
               
               
                 C9 
                  3.58476501e−07 
                  3.56008272e−08 
                  4.00254821e−09 
               
               
                 C10 
                 −9.89224446e−12 
                  7.79106894e−12  
                  6.10160158e−12 
               
               
                 C12 
                  1.89327581e−10 
                 −3.72471221e−11 
                  2.5509318e−11 
               
               
                 C14 
                 −2.20258778e−11 
                  8.74900994e−12  
                  −2.0034758e−12 
               
               
                 C16 
                  3.36193204e−14 
                 −9.31983872e−15 
                 −3.37582455e−14 
               
               
                 C18 
                 −2.12152315e−14 
                 −1.05001591e−14 
                 −2.60298094e−15 
               
               
                 C20 
                  1.59066226e−12 
                  4.18135526e−14  
                  1.5188487e−14 
               
               
                 C21 
                 −3.57227533e−17 
                  2.48094952e−16 
                 −2.46535966e−18 
               
               
                 C23 
                  3.58646429e−16 
                 −5.00075703e−16 
                  4.78079643e−16 
               
               
                 C25 
                 −1.15198491e−15 
                  4.51130937e−17 
                 −3.26758719e−17 
               
               
                 C27 
                  2.69000089e−15 
                 −9.86544399e−17 
                  1.98569101e−17 
               
               
                 C29 
                  2.41625825e−19  
                  9.76505015e−19 
                 −7.87248278e−19 
               
               
                 C31 
                 −2.87191946e−18 
                  −2.8203702e−19 
                 −2.06138283e−19 
               
               
                 C33 
                  6.65153055e−18 
                  5.40607111e−19 
                  7.02649602e−19 
               
               
                 C35 
                 −5.72207985e−19 
                  2.31901108e−19 
                 −1.87549676e−19 
               
               
                 C36 
                  6.83729655e−22 
                 −1.00234103e−20 
                 −8.03851852e−20 
               
               
                 C38 
                  1.73175943e−21 
                  1.71755837e−21 
                  1.11388044e−20 
               
               
                 C40 
                 −2.72288684e−20  
                  1.22332554e−20 
                 −1.96231837e−20 
               
               
                 C42 
                 −2.97819086e−21 
                 −1.20581608e−21 
                  1.6679562e−22 
               
               
                 C44 
                 −6.38720395e−20 
                  −5.106798e−22 
                  6.16920305e−22 
               
               
                 C46 
                 −5.68914983e−24 
                 −5.45078584e−23 
                  2.3674629e−22 
               
               
                 C48 
                 −2.84889707e−23 
                 −6.64895561e−23 
                 −3.49242868e−22 
               
               
                 C50 
                  3.83000613e−23 
                 −4.29346478e−23 
                 −1.19854415e−24 
               
               
                 C52 
                 −4.35843617e−22 
                 −4.88783101e−24 
                 −2.79173067e−24 
               
               
                 C54 
                 −3.75443641e−22  
                  5.45348307e−25 
                 −3.58898078e−24 
               
               
                 C55 
                 −1.91069212e−26 
                  5.17580849e−25 
                   1.20339e−23 
               
               
                 C57 
                 −1.72210512e−25 
                  7.20583842e−25 
                  −3.2258403e−24 
               
               
                 C59 
                 −1.79738954e−25 
                  1.20881577e−25 
                  1.09042629e−24 
               
               
                 C61 
                  4.86608652e−25 
                  5.18691604e−26 
                 −1.64197128e−26 
               
               
                 C63 
                 −1.43412851e−24  
                  1.31385226e−26 
                 −2.52495238e−26 
               
               
                 C65 
                 −1.41254772e−24 
                  1.87401871e−28 
                  9.47040406e−27 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
             
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 4a 
               
             
             
               
                   
               
               
                 for FIG. 3 
               
             
          
           
               
                 Surface 
                 DCX 
                 DCY 
                 DCZ 
               
               
                   
               
             
          
           
               
                 Image plane  
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 M6 
                 0.00000000 
                 0.00000000 
                 1074.41519438 
               
               
                 M5 
                 0.00000000 
                 0.00000000 
                 99.48354955 
               
               
                 M4 
                 0.00000000 
                 −18.05249415 
                 1035.70751868 
               
               
                 M3 
                 0.00000000 
                 354.51020937 
                 138.41973030 
               
               
                 M2 
                 0.00000000 
                 583.20780276 
                 1031.25041556 
               
               
                 M1 
                 0.00000000 
                 480.41270702 
                 1449.24921820 
               
               
                 Object plane 
                 0.00000000 
                 285.24003154 
                 1740.57897606 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
             
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 4b 
               
             
             
               
                   
               
               
                 for FIG. 3 
               
             
          
           
               
                 Surface 
                 TLA[deg] 
                 TLB[deg] 
                 TLC[deg] 
               
               
                   
               
             
          
           
               
                 Image plane 
                 −0.00000000 
                 0.00000000 
                 −0.00000000 
               
               
                 M6 
                 −0.00000000 
                 0.00000000 
                 −0.00000000 
               
               
                 M5 
                 180.10113984 
                 0.00000000 
                 −0.00000000 
               
               
                 M4 
                 10.44914510 
                 0.00000000 
                 −0.00000000 
               
               
                 M3 
                 183.92725161 
                 0.00000000 
                 −0.00000000 
               
               
                 M2 
                 −90.00000000 
                 0.00000000 
                 −0.00000000 
               
               
                 M1 
                 −65.87304931 
                 0.00000000 
                 −0.00000000 
               
               
                 Object plane 
                 219.81806502 
                 0.00000000 
                 −0.00000000 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 5 for FIG. 3 
               
               
                   
               
               
                   
                 Surface 
                 AOI[deg] 
                 Reflectivity 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                   
                 M6 
                 0.00000000 
                 0.66565840 
               
               
                   
                 M5 
                 0.10113984 
                 0.66566360 
               
               
                   
                 M4 
                 10.98797784 
                 0.65222749 
               
               
                   
                 M3 
                 18.06949355 
                 0.62484145 
               
               
                   
                 M2 
                 76.03503185 
                 0.82099428 
               
               
                   
                 M1 
                 79.82551612 
                 0.87599782 
               
               
                   
                 Overall transmission 
                   
                 0.1299 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
             
               
               
               
             
           
               
                 TABLE 6 for FIG. 3 
               
               
                   
               
               
                 X[mm] 
                 Y[mm] 
                 Z[mm] 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 0.00000000 
                 492.97220996 
                 −96.10794925 
               
               
                 77.13108081 
                 486.98647828 
                 −95.94002807 
               
               
                 152.43816471 
                 469.15642998 
                 −95.45692466 
               
               
                 224.12261559 
                 439.86539988 
                 −94.71825918 
               
               
                 290.44072269 
                 399.75735967 
                 −93.81572137 
               
               
                 349.74050124 
                 349.74050124 
                 −92.86218695 
               
               
                 400.50664890 
                 290.98511318 
                 −91.97772489 
               
               
                 441.41186799 
                 224.91058045 
                 −91.27386447 
               
               
                 471.36993312 
                 153.15737548 
                 −90.83815133 
               
               
                 489.58364884 
                 77.54243221 
                 −90.72167600 
               
               
                 495.58014901 
                 0.00000000 
                 −90.93247362 
               
               
                 489.22770728 
                 −77.48605661 
                 −91.43684982 
               
               
                 470.73236324 
                 −152.95021647 
                 −92.16852700 
               
               
                 440.61763177 
                 −224.50589688 
                 −93.04283923 
               
               
                 399.69380564 
                 −290.39454798 
                 −93.97161858 
               
               
                 349.02334931 
                 −349.02334931 
                 −94.87488676 
               
               
                 289.88633185 
                 −398.99430615 
                 −95.68748150 
               
               
                 223.74683115 
                 −439.12788139 
                 −96.36090853 
               
               
                 152.21937846 
                 −468.48307512 
                 −96.86197052 
               
               
                 77.03412861 
                 −486.37434617 
                 −97.16995149 
               
               
                 0.00000000 
                 −492.38475170 
                 −97.27376481 
               
               
                 −77.03412861 
                 −486.37434617 
                 −97.16995149 
               
               
                 −152.21937846 
                 −468.48307512 
                 −96.86197052 
               
               
                 −223.74683115 
                 −439.12788139 
                 −96.36090853 
               
               
                 −289.88633185 
                 −398.99430615 
                 −95.68748150 
               
               
                 −349.02334931 
                 −349.02334931 
                 −94.87488676 
               
               
                 −399.69380564 
                 −290.39454798 
                 −93.97161858 
               
               
                 −440.61763177 
                 −224.50589688 
                 −93.04283923 
               
               
                 −470.73236324 
                 −152.95021647 
                 −92.16852700 
               
               
                 −489.22770728 
                 −77.48605661 
                 −91.43684982 
               
               
                 −495.58014901 
                 −0.00000000 
                 −90.93247362 
               
               
                 −489.58364884 
                 77.54243221 
                 −90.72167600 
               
               
                 −471.36993312 
                 153.15737548 
                 −90.83815133 
               
               
                 −441.41186799 
                 224.91058045 
                 −91.27386447 
               
               
                 −400.50664890 
                 290.98511318 
                 −91.97772489 
               
               
                 −349.74050124 
                 349.74050124 
                 −92.86218695 
               
               
                 −290.44072269 
                 399.75735967 
                 −93.81572137 
               
               
                 −224.12261559 
                 439.86539988 
                 −94.71825918 
               
               
                 −152.43816471 
                 469.15642998 
                 −95.45692466 
               
               
                 −77.13108081 
                 486.98647828 
                 −95.94002807 
               
               
                   
               
             
          
         
       
     
         [0133]    An overall reflectivity of the projection optical unit  20  is 12.99%. 
         [0134]    The projection optical unit  20  has an image-side numerical aperture of 0.45. The image field  8  has an x-extent of two times 6.5 mm and a y-extent of 1 mm. The projection optical unit  20  is optimized for an operating wavelength of the illumination light  3  of 13.5 nm. 
         [0135]    The projection optical unit  20  has a reducing imaging scale of 8×(β=8). 
         [0136]    The projection optical unit  20  has exactly six mirrors M 1  to M 6 . The mirrors M 1  and M 2  are once again embodied as mirrors for grazing incidence and, as a mirror pair, are arranged directly behind one another in the imaging beam path. The projection optical unit  20  has exactly two mirrors for grazing incidence, namely the mirrors M 1  and M 2 . The mirrors M 3  to M 6  are embodied as mirrors for normal incidence. 
         [0137]    The projection optical unit  20  has an overall reflectivity which is greater than 11.97%. 
         [0138]    In absolute terms, the object plane  5  is tilted with respect to the image plane  9  by an angle of approximately 39° about the x-axis. Accordingly, a value TLA of approximately 219° is specified for the object field in the last table above (Table 3b for  FIG. 3 ). 
         [0139]    A z-distance between the object field  4  and the image field  8  is approximately 1740 mm. The mirror with the largest diameter is the mirror M 6  with a diameter value of 1000 mm. A y-distance between the object field  4  and the image field  8 , i.e. the value d OIS , is 285 mm at the object field  4 . Just as in the projection optical unit  7 , an object field-side chief ray angle CRAO is 5.5° in the projection optical unit  20 . A scanned RMS value for the wavefront aberration is less than 10.5 mλ in the projection optical unit  20 . A distortion value in the projection optical unit  20  is less than 0.1 nm. A telecentricity value of the projection optical unit  20 , in the x-direction, is less than 5 mrad on the image field side. A telecentricity value of the projection optical unit  20 , in the y-direction, is less than 0.45 mrad on the image field side. 
         [0140]    In the projection optical unit  20 , a pupil plane is arranged in the region of a reflection of the imaging light  3  on the penultimate mirror M 5  in the beam path upstream of the image field  8 . Therefore, an aperture stop can be arranged on the mirror M 5 , or else on the mirror M 6 . The polygonal edge in accordance with preceding Table 6 for  FIG. 3  relates to a stop on the mirror M 6 . 
         [0141]    The projection optical unit  20  is substantially telecentric on the image side. A working distance between the mirror M 5  closest to the image field and the image field  8  is approximately 90 mm. 
         [0142]    The image field  8  lies in the first image plane of the projection optical unit  20  downstream of the object field  4 . Therefore, the projection optical unit  20  does not generate an intermediate image in the imaging beam path between the object field  4  and the image field  8 . 
         [0143]    A pupil obscuration of the projection optical unit  20  is caused by an arrangement of the antepenultimate mirror M 4  in the imaging beam path directly in front of a center of the last mirror M 6 . This obscuration is less than 26% of the image-side numerical aperture of the projection optical unit  20 . 
         [0144]    Only the penultimate mirror M 5  in the imaging beam path has a passage opening  17  for the imaging light  3 . All other mirrors M 1  to M 4  and M 6  have a continuous reflection surface. 
         [0145]    The reflection surface of the mirror M 5  is used around the passage opening  17  of the latter. The reflection surface of the mirror M 6  is not used continuously but only where there is no obscuration by the mirror M 4  arranged in front of the reflection surface of the mirror M 6 . 
         [0146]    The two mirrors M 1  and M 2  for grazing incidence deflect the imaging light  3  laterally past the last mirror M 6  and around the reflection surface thereof. 
         [0147]    The mirror M 2  is rotated by 90° about the x-axis in relation to the image plane  9 , i.e. it is practically perpendicular to the image plane  9 . 
         [0148]    The mirrors M 1 , M 3  and M 6  have negative values for the radius, i.e., are, in principle, concave mirrors. The mirrors M 2 , M 4  and M 5  have a positive value for the radius, i.e. are, in principle, convex mirrors. The mirrors M 1  and M 2  for grazing incidence once again have very large radii, i.e. only constitute small deviations from plane reflection surfaces. 
         [0149]    A further embodiment of a projection optical unit  21 , which can be used in the projection exposure apparatus  1  according to  FIG. 1  instead of the projection optical unit  7 , is explained in the following text on the basis of  FIG. 4 . Components and functions which were already explained above in the context of  FIGS. 1 to 3  are appropriately denoted by the same reference signs and are not discussed in detail again. 
         [0150]    The mirrors M 1  to M 6  are once again embodied as free-form surfaces, for which the free-form surface equation (1), specified above, applies. The optical design data of the projection optical unit  21  can be gathered from the following tables which, in terms of their design, correspond to the tables in relation to the projection optical unit  7  according to  FIG. 2 . 
         [0000]    
       
         
               
               
               
             
               
               
               
               
             
               
               
               
             
           
               
                 TABLE 1 for FIG. 4 
               
               
                   
               
               
                   
                 Exemplary embodiment 
                 FIG. 4 
               
               
                   
               
             
             
               
                   
                 NA 
                 0.45 
               
             
          
           
               
                   
                 Wavelength 
                 13.5 
                 nm 
               
               
                   
                 Field dimension x 
                 13.0 
                 mm 
               
               
                   
                 Field dimension y 
                 0.72 
                 mm 
               
               
                   
                 Feldkruemmung 
                 0.0 
                 1/mm 
               
             
          
           
               
                   
                 Stop 
                 M6 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
               
               
             
               
               
               
               
               
               
             
           
               
                 TABLE 2 for FIG. 4 
               
               
                   
               
               
                 Surface 
                 Radius x [mm] 
                 Power x[1/mm] 
                 Radius y[mm] 
                 Power y[1/mm] 
                 Operating 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 M6 
                 −1833.09710653 
                 0.00109040 
                 −1385.57542302 
                 0.00144431 
                 REFL 
               
               
                 M5 
                 18877.49637144 
                 −0.00010594 
                 277.21693985 
                 −0.00721519 
                 REFL 
               
               
                 M4 
                 1438.66217038 
                 −0.00136186 
                 2430.30119114 
                 −0.00084006 
                 REFL 
               
               
                 M3 
                 −5662.42216724 
                 0.00034243 
                 −2106.61551667 
                 0.00097927 
                 REFL 
               
               
                 M2 
                 −2969.78461968 
                 0.00015377 
                 6812.60965389 
                 −0.00128573 
                 REFL 
               
               
                 M1 
                 −2412.85320295 
                 0.00015904 
                 — 
                 0.00054720 
                 REFL 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
             
               
               
               
               
             
           
               
                 TABLE 3a 
               
             
             
               
                   
               
               
                 for FIG. 4 
               
             
          
           
               
                 Coefficient 
                 M6 
                 M5 
                 M4 
               
               
                   
               
               
                 KY 
                   0.00000000 
                   0.00000000 
                   0.00000000 
               
               
                 KX 
                   0.00000000 
                   0.00000000 
                   0.00000000 
               
               
                 RX 
                 −1833.09710700 
                 18877.49637000 
                 1438.66217000 
               
               
                 C7 
                  7.14702547e−09 
                  1.33000904e−07 
                   2.160143e−07 
               
               
                 C9 
                  1.45748065e−09 
                   1.5551429e−06 
                  1.9750259e−07 
               
               
                 C10 
                 −1.34433863e−12 
                  3.23052512e−11 
                  5.21219354e−10 
               
               
                 C12 
                 −8.65246158e−12 
                  5.51908435e−10 
                  1.38068278e−09 
               
               
                 C14 
                 −1.26897363e−12 
                   8.494392e−09 
                  2.47542622e−09 
               
               
                 C16 
                  2.49155269e−15 
                  7.83281848e−14 
                  1.30801781e−12 
               
               
                 C18 
                  2.81581124e−15 
                  2.59073558e−12 
                  2.75791629e−12 
               
               
                 C20 
                  2.0590302e−16 
                 −3.40842288e−12 
                 −8.77664173e−13 
               
               
                 C21 
                 −8.77508671e−19 
                  1.53250792e−17 
                  1.64959774e−15 
               
               
                 C23 
                 −5.17996772e−18 
                  9.13281795e−16 
                  6.92468226e−15 
               
               
                 C25 
                 −5.66728016e−18 
                  2.13183138e−14 
                  1.40378342e−14 
               
               
                 C27 
                 −7.76369168e−19 
                  1.54890141e−13 
                 −1.72019847e−15 
               
               
                 C29 
                  7.88863678e−22 
                  6.55771751e−20 
                  7.43041791e−18 
               
               
                 C31 
                  1.75672504e−21 
                  3.84581458e−18 
                  2.35894363e−17 
               
               
                 C33 
                  1.18814584e−21 
                  1.39333507e−16 
                  9.97718923e−18 
               
               
                 C35 
                  1.7493548e−22 
                  9.81761115e−16 
                 −8.01499171e−17 
               
               
                 C36 
                 −3.26021342e−25 
                  4.67363491e−24 
                  8.85753541e−21 
               
               
                 C38 
                 −2.46229027e−24 
                   7.7058017e−22 
                  4.5880821e−20 
               
               
                 C40 
                 −4.93976866e−24 
                  4.33147562e−20 
                  9.06865917e−20 
               
               
                 C42 
                 −3.29404362e−24 
                  1.02682561e−18 
                  2.64402588e−20 
               
               
                 C44 
                 −2.40295612e−25 
                 −5.42295264e−18 
                 −1.60806374e−19 
               
               
                 C46 
                  2.57227242e−28 
                  7.65609824e−26 
                  4.63076076e−23 
               
               
                 C48 
                  9.19738739e−28 
                  9.96764671e−24 
                  1.91012714e−22 
               
               
                 C50 
                  1.09743754e−27 
                  3.12974539e−22 
                  1.20398721e−22 
               
               
                 C52 
                  6.66432955e−28 
                  4.91785424e−21 
                 −6.82880718e−22 
               
               
                 C54 
                   4.73076e−29 
                 −1.02818878e−19 
                 −1.43891315e−22 
               
               
                 C55 
                 −1.11030431e−31 
                  1.20361818e−29 
                  5.11515109e−27 
               
               
                 C57 
                 −8.81991592e−31 
                  1.86280552e−27 
                  7.24559338e−26 
               
               
                 C59 
                 −2.38622966e−30 
                  9.47962857e−26 
                  6.67407339e−25 
               
               
                 C61 
                 −2.66847543e−30 
                  1.96385049e−24 
                  4.01261999e−25 
               
               
                 C63 
                 −1.24137091e−30 
                  3.77800757e−23 
                  1.66791629e−24 
               
               
                 C65 
                  −2.2904696e−31 
                  1.60420604e−22 
                  1.13771785e−23 
               
               
                 C67 
                  7.25951889e−35 
                   0 
                   0 
               
               
                 C69 
                  4.78438869e−34 
                   0 
                   0 
               
               
                 C71 
                  1.10917899e−33 
                   0 
                   0 
               
               
                 C73 
                  1.07566223e−33 
                   0 
                   0 
               
               
                 C75 
                  3.02812827e−34 
                   0 
                   0 
               
               
                 C77 
                 −3.25579859e−35 
                   0 
                   0 
               
               
                 C78 
                 −6.82496446e−38 
                   0 
                   0 
               
               
                 C80 
                  −7.3260874e−37 
                   0 
                   0 
               
               
                 C82 
                 −2.69415965e−36 
                   0 
                   0 
               
               
                 C84 
                 −4.80262328e−36 
                   0 
                   0 
               
               
                 C86 
                  −4.4443622e−36 
                   0 
                   0 
               
               
                 C88  
                  −1.8807898e−36 
                   0 
                   0 
               
               
                 C90 
                 −1.49017219e−37 
                   0 
                   0 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
             
               
               
               
               
             
           
               
                 TABLE 3b 
               
             
             
               
                   
               
               
                 for FIG. 4 
               
             
          
           
               
                 Coefficient 
                 M3 
                 M2 
                 M1 
               
               
                   
               
               
                 KY 
                   0.00000000 
                   0.00000000 
                   0.00000000 
               
               
                 KX 
                   0.00000000 
                   0.00000000 
                   0.00000000 
               
               
                 RX 
                 −5662.42216700  
                 −2969.78462000 
                 −2412.85320300 
               
               
                 C7 
                 −2.05061152e−08 
                 −9.01491023e−09 
                  3.75760309e−08 
               
               
                 C9 
                 −2.38681532e−08 
                 −1.07722528e−08 
                 −1.82353448e−08 
               
               
                 C10 
                 −4.85387951e−11 
                  4.11164421e−11 
                  5.36007066e−11 
               
               
                 C12 
                 −7.98597183e−11 
                  4.52376364e−11 
                  6.33402678e−11 
               
               
                 C14 
                 −1.11064223e−10 
                  5.55561647e−11 
                 −2.21093738e−11 
               
               
                 C16 
                  3.94476467e−14 
                 −6.11601685e−15 
                  4.38538416e−14 
               
               
                 C18 
                  3.00776935e−15 
                  3.77778718e−14 
                  5.55251888e−14 
               
               
                 C20 
                 −3.12244022e−14 
                  8.99013939e−14 
                  3.83809162e−14 
               
               
                 C21 
                 −3.00816505e−18 
                  1.02603871e−16 
                  5.41186271e−17 
               
               
                 C23 
                 −1.21678874e−17 
                  8.68697433e−17 
                 −5.28283589e−17 
               
               
                 C25 
                  7.00694254e−17 
                 −2.96767637e−17 
                  1.22856285e−16 
               
               
                 C27 
                  1.94317927e−16 
                  7.96011589e−17 
                  1.88629304e−16 
               
               
                 C29 
                  1.8490636e−20 
                  5.54481729e−19 
                  1.47830311e−18 
               
               
                 C31 
                 −4.13981835e−20 
                 −1.54413661e−19 
                  2.63725411e−20 
               
               
                 C33 
                 −7.30655263e−20 
                 −5.09614703e−19 
                 −1.57531897e−18 
               
               
                 C35 
                 −1.01967973e−19 
                  2.01225435e−19 
                  8.95399962e−19 
               
               
                 C36 
                  −1.7395787e−22 
                  6.68694592e−21 
                 −3.03140695e−20 
               
               
                 C38 
                 −4.94707313e−23 
                  2.32782668e−21 
                 −4.39942988e−21 
               
               
                 C40 
                  1.78489699e−23 
                 −5.19392946e−22 
                  5.04820517e−21 
               
               
                 C42 
                  −6.0518318e−22 
                 −1.28561877e−21 
                 −5.75788873e−21 
               
               
                 C44 
                 −6.16746237e−22 
                  2.31456185e−22 
                  2.29885486e−21 
               
               
                 C46 
                 −4.02009642e−25 
                 −1.74361335e−23 
                  3.84621986e−23 
               
               
                 C48 
                 −3.28096057e−25 
                 −2.28128679e−24 
                 −3.25886796e−23 
               
               
                 C50 
                  3.55844765e−27 
                 −1.29996778e−24 
                  2.31874654e−23 
               
               
                 C52 
                  2.77737882e−25 
                 −3.09482301e−24 
                 −3.60029308e−24 
               
               
                 C54 
                  7.20889308e−26 
                 −3.20584144e−25 
                  1.90845046e−24 
               
               
                 C55 
                  2.93653556e−27 
                 −2.73182908e−25 
                  2.44630793e−24 
               
               
                 C57 
                  3.4262361e−27 
                  −1.1889464e−25 
                  5.67957006e−25 
               
               
                 C59 
                  1.45309977e−28 
                  −8.784571e−27 
                 −1.36102401e−25 
               
               
                 C61 
                  6.41931285e−28 
                 −3.29041198e−27 
                  3.37050556e−26 
               
               
                 C63 
                  9.79557956e−28 
                 −3.38378135e−27 
                  8.90781735e−27 
               
               
                 C65 
                  7.94905548e−28 
                 −6.28588637e−28 
                 −9.66111645e−28 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
             
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 4a 
               
             
             
               
                   
               
               
                 for FIG. 4 
               
             
          
           
               
                 Surface 
                 DCX 
                 DCY 
                 DCZ 
               
               
                   
               
             
          
           
               
                 Image plane 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 M6 
                 0.00000000 
                 0.00000000 
                 1336.04673264 
               
               
                 M5 
                 0.00000000 
                 88.98262746 
                 49.91664546 
               
               
                 M4 
                 0.00000000 
                 34.16051206 
                 1290.78810464 
               
               
                 M3 
                 0.00000000 
                 536.44795589 
                 234.08633307 
               
               
                 M2 
                 0.00000000 
                 −715.74434374 
                 1150.16573744 
               
               
                 M1 
                 0.00000000 
                 −995.94799367 
                 1693.10641178 
               
               
                 Object plane 
                 0.00000000 
                 −1039.51678260 
                 2186.05270414 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
             
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 4b 
               
             
             
               
                   
               
               
                 for FIG. 4 
               
             
          
           
               
                 Surface 
                 TLA[deg] 
                 TLB[deg] 
                 TLC[deg] 
               
               
                   
               
             
          
           
               
                 Image plane 
                 −0.00000000 
                 0.00000000 
                 −0.00000000 
               
               
                 M6 
                 1.98476664 
                 0.00000000 
                 −0.00000000 
               
               
                 M5 
                 183.27217830 
                 0.00000000 
                 −0.00000000 
               
               
                 M4 
                 14.01024317 
                 0.00000000 
                 −0.00000000 
               
               
                 M3 
                 219.65811514 
                 0.00000000 
                 −0.00000000 
               
               
                 M2 
                 130.80142743 
                 0.00000000 
                 −0.00000000 
               
               
                 M1 
                 106.49725896 
                 0.00000000 
                 −0.00000000 
               
               
                 Object plane 
                 −0.00000000 
                 0.00000000 
                 −0.00000000 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 5 for FIG. 4 
               
               
                   
               
               
                   
                 Surface 
                 Angle of incidence [deg] 
                 Reflectivity 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                   
                 M6 
                 1.98476664 
                 0.66533020 
               
               
                   
                 M5 
                 0.75200847 
                 0.66564033 
               
               
                   
                 M4 
                 11.58467514 
                 0.65060513 
               
               
                   
                 M3 
                 14.19064083 
                 0.64216831 
               
               
                   
                 M2 
                 76.80106420 
                 0.83300871 
               
               
                   
                 M1 
                 78.93793736 
                 0.86402184 
               
               
                   
                 Overall transmission 
                   
                 0.1332 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
             
               
               
               
             
           
               
                 TABLE 6 for FIG. 4 
               
               
                   
               
               
                 X[mm] 
                 Y[mm] 
                 Z[mm] 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 0.00000000 
                 608.52234041 
                 −140.64683575 
               
               
                 95.94023321 
                 601.25931900 
                 −139.86882799 
               
               
                 189.75379987 
                 579.58413919 
                 −137.60310659 
               
               
                 279.30462104 
                 543.84975389 
                 −134.05121860 
               
               
                 362.44987510 
                 494.67987297 
                 −129.53696039 
               
               
                 437.06577774 
                 433.01415623 
                 −124.48536770 
               
               
                 501.10457736 
                 360.15495964 
                 −119.38904049 
               
               
                 552.68495125 
                 277.79910686 
                 −114.76081019 
               
               
                 590.20868666 
                 188.03626648 
                 −111.07562152 
               
               
                 612.48557340 
                 93.29913092 
                 −108.70965207 
               
               
                 618.84016352 
                 −3.73883968 
                 −107.88877482 
               
               
                 609.17368855 
                 −100.30707275 
                 −108.65869405 
               
               
                 583.96436539 
                 −193.69806970 
                 −110.88422162 
               
               
                 544.20637659 
                 −281.41366860 
                 −114.27689980 
               
               
                 491.30439984 
                 −361.27238788 
                 −118.44241764 
               
               
                 426.94956472 
                 −431.46613730 
                 −122.93554700 
               
               
                 353.00187334 
                 −490.56898267 
                 −127.31151102 
               
               
                 271.39634739 
                 −537.51059935 
                 −131.16696091 
               
               
                 184.08035860 
                 −571.53072807 
                 −134.16843492 
               
               
                 92.98146093 
                 −592.12968050 
                 −136.06958267 
               
               
                 0.00000000 
                 −599.02618416 
                 −136.72010822 
               
               
                 −92.98146093 
                 −592.12968050 
                 −136.06958267 
               
               
                 −184.08035860 
                 −571.53072807 
                 −134.16843492 
               
               
                 −271.39634739 
                 −537.51059935 
                 −131.16696091 
               
               
                 −353.00187334 
                 −490.56898267 
                 −127.31151102 
               
               
                 −426.94956472 
                 −431.46613730 
                 −122.93554700 
               
               
                 −491.30439984 
                 −361.27238788 
                 −118.44241764 
               
               
                 −544.20637659 
                 −281.41366860 
                 −114.27689980 
               
               
                 −583.96436539 
                 −193.69806970 
                 −110.88422162 
               
               
                 −609.17368855 
                 −100.30707275 
                 −108.65869405 
               
               
                 −618.84016352 
                 −3.73883968 
                 −107.88877482 
               
               
                 −612.48557340 
                 93.29913092 
                 −108.70965207 
               
               
                 −590.20868666 
                 188.03626648 
                 −111.07562152 
               
               
                 −552.68495125 
                 277.79910686 
                 −114.76081019 
               
               
                 −501.10457736 
                 360.15495964 
                 −119.38904049 
               
               
                 −437.06577774 
                 433.01415623 
                 −124.48536770 
               
               
                 −362.44987510 
                 494.67987297 
                 −129.53696039 
               
               
                 −279.30462104 
                 543.84975389 
                 −134.05121860 
               
               
                 −189.75379987 
                 579.58413919 
                 −137.60310659 
               
               
                 −95.94023321 
                 601.25931900 
                 −139.86882799 
               
               
                   
               
             
          
         
       
     
         [0151]    An overall reflectivity of the projection optical unit  21  is 13.32%. 
         [0152]    The projection optical unit  21  has a reducing imaging scale of 8×(β=8). 
         [0153]    The image field  8  has an x-extent of two times 6.5 mm and a y-extent of 0.8 mm. The projection optical unit  21  is optimized for an operating wavelength of the illumination light  3  of 13.5 nm. 
         [0154]    Like the projection optical unit  20 , the projection optical unit  21  is also a purely catoptric projection optical unit with exactly six mirrors M 1  to M 6 . Like in the projection optical unit  20 , the first two mirrors M 1  and M 2  of the projection optical unit  21  in the imaging beam path downstream of the object field  4  are embodied as mirrors for grazing incidence. The further mirrors M 3  to M 6  are embodied as mirrors for normal incidence. 
         [0155]    Unlike the beam guidance of the projection optical units  7  and  20 , the chief rays cross in the beam guidance of the projection optical unit  21 . This crossing occurs between the partial imaging beam paths between the mirrors M 2  and M 3  on the one hand and between M 4  and M 5  on the other hand, where a crossing region K 1  is indicated. A further crossing of the chief rays of the imaging partial beam between the mirrors M 2  and M 3  occurs with the chief rays of the imaging partial beams on the one hand between the mirrors M 5  and M 6  and between the mirror M 6  and the image field on the other hand, which is indicated by further crossing regions K 2  and K 3 . 
         [0156]    In the projection optical unit  21 , the object plane  5  and the image plane  9  extend parallel to one another. 
         [0157]    The mirrors M 1 , M 3  and M 6  have negative values for the radius, i.e. are, in principle, concave mirrors. The mirrors M 2 , M 4  and M 5  have positive values for the radius, i.e. are, in principle, convex mirrors. The mirrors M 1  and M 2  once again have very large absolute radii, i.e. only constitute small deviations from plane reflection surfaces. 
         [0158]    Like in the projection optical unit  20 , the antepenultimate mirror M 4  of the projection optical unit  21  is arranged in front of a center of a reflection surface of the last mirror M 6  and therefore causes a pupil obscuration of the projection optical unit  21 . 
         [0159]    In the projection optical unit  21 , none of the mirrors M 1  to M 6  have a passage opening for the imaging light  3 . Except for in the case of the mirror M 6 , all reflection surfaces of the projection optical unit  21 , i.e. the reflection surfaces of the mirrors M 1  to M 5 , can be used without gaps. The reflection surface of the mirror M 6  is used were no obscuration due to the mirror M 4  occurs. 
         [0160]    In the projection optical unit  21 , a z-distance between the object plane  5  and the image plane  9  is approximately 2200 mm. 
         [0161]    A typical diameter of the largest mirror M 6  is approximately 1200 mm. 
         [0162]    An object/image offset d OIS  is approximately 1100 mm in the projection optical unit  21 . In the projection optical unit  21 , the object field-side chief rays  16  also include an angle CRAO of 5.5° with a normal of the object plane  5 . 
         [0163]    The projection optical unit  21  has a scanned RMS value of the image field-side wavefront which is less than 11 mλ. In the projection optical unit  21 , an image field-side distortion value is less than 0.1 nm. In the projection optical unit  21 , an image-side telecentricity value in the x-direction is less than 4 mrad. In the projection optical unit  21 , an image-side telecentricity value in the y-direction is less than 0.3 mrad. 
         [0164]    In the projection optical unit  21 , a pupil plane is arranged in the region of a reflection of the imaging light  3  on the mirror M 6 . Therefore, an aperture stop can be provided on the mirror M 6 . The polygonal edge in accordance with preceding Table 6 for  FIG. 4  relates to this stop position on the mirror M 6 . Like the projection optical unit  20 , the projection optical unit  21  does not have an intermediate image either. 
         [0165]    The projection optical unit  21  is substantially telecentric on the image side. 
         [0166]    A working distance between the mirror closest to the image field, the penultimate mirror M 5  in the imaging beam path, and the image field  8  is 36 mm. 
         [0167]    The mirror M 4  defines an image-side obscuration, which is less than 23% of the image-side numerical aperture of the projection optical unit  21 . 
         [0168]    A further embodiment of a projection optical unit  22 , which can be used in the projection exposure apparatus  1  according to  FIG. 1  instead of e.g. the projection optical unit  7 , is explained in the following text on the basis of  FIG. 5 . Components and functions which were already explained above in the context of  FIGS. 1 to 4  are appropriately denoted by the same reference signs and are not discussed again in detail. 
         [0169]    Overall, the projection optical unit  22  has seven mirrors M 1  to M 7 . The projection optical unit  22  has three mirrors for grazing incidence, namely the mirrors M 1  to M 3 , and four mirrors for normal incidence, namely the mirrors M 4  to M 7 . These mirrors M 1  to M 7  are once again configured as free-form surfaces, for which the free-form surface equation (1), specified above, applies. The optical design data from the projection optical unit  22  can be gathered from the following tables, which, in terms of their design, correspond to the tables in relation to the projection optical unit  7  according to  FIG. 2 . 
         [0000]    
       
         
               
               
               
             
               
               
               
               
             
               
               
               
             
           
               
                 TABLE 1 for FIG. 5 
               
               
                   
               
               
                   
                 Exemplary embodiment 
                 FIG. 5 
               
               
                   
               
             
             
               
                   
                 NA 
                 0.45 
               
             
          
           
               
                   
                 Wavelength 
                 13.5 
                 nm 
               
               
                   
                 Field dimension x 
                 13.0 
                 mm 
               
               
                   
                 Field dimension y 
                 0.98 
                 mm 
               
               
                   
                 Feldkruemmung 
                 0.0 
                 1/mm 
               
             
          
           
               
                   
                 Stop 
                 M7 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
               
               
             
               
               
               
               
               
               
             
           
               
                 TABLE 2 for FIG. 5 
               
               
                   
               
               
                 Surface 
                 Radius_x[mm] 
                 Power_x[1/mm] 
                 Radius_y[mm] 
                 Power_y[1/mm] 
                 Operating 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 M7 
                 — 
                 0.00117460 
                 — 
                 0.00125545 
                 REFL 
               
               
                 M6 
                 7360.39271982 
                 −0.00027172 
                 3417.65341930 
                 −0.00058520 
                 REFL 
               
               
                 M5 
                 2115.61242515 
                 −0.00092738 
                 1567.72388388 
                 −0.00130046 
                 REFL 
               
               
                 M4 
                 — 
                 0.00031874 
                 — 
                 0.00057981 
                 REFL 
               
               
                 M3 
                 0.00000000 
                 −inf 
                 0.00000000 
                 −inf 
                 REFL 
               
               
                 M2 
                 0.00000000 
                 −inf 
                 0.00000000 
                 −inf 
                 REFL 
               
               
                 M1 
                 0.00000000 
                  inf 
                 0.00000000 
                  inf 
                 REFL 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
             
               
               
               
               
             
           
               
                 TABLE 3a 
               
             
             
               
                   
               
               
                 for FIG. 5 
               
             
          
           
               
                 Coefficient 
                 M7 
                 M6 
                 M5 
               
               
                   
               
               
                 KY 
                   0.00000000 
                   0.00000000 
                   0.00000000 
               
               
                 KX 
                   0.00000000 
                   0.00000000 
                   0.00000000 
               
               
                 RX 
                 −1702.70024300 
                 7360.39272000  
                 2115.61242500 
               
               
                 C7 
                  1.79847891e−08 
                  1.92019811e−07 
                  6.09839447e−07 
               
               
                 C9 
                  3.08103036e−09 
                  7.1188267e−08 
                  7.08555971e−07 
               
               
                 C10 
                 −4.24845893e−12 
                  8.96360067e−11  
                  1.42628939e−10 
               
               
                 C12 
                 −9.53203499e−12 
                  3.27897349e−10  
                  6.15654836e−10 
               
               
                 C14 
                 −3.56696766e−12 
                  1.32008619e−10  
                  1.24698071e−09 
               
               
                 C16 
                  5.53144807e−15 
                  1.36194158e−13 
                  6.05714405e−13 
               
               
                 C18 
                  6.34539803e−15 
                  2.34455978e−13 
                  1.21593408e−12 
               
               
                 C20 
                  1.81140787e−15 
                  9.69419966e−14 
                  5.15369198e−12 
               
               
                 C21 
                 −2.11810311e−18 
                  5.15348174e−17 
                  2.91434391e−16 
               
               
                 C23 
                 −7.16043548e−18 
                  3.75752681e−16 
                  1.25156571e−15 
               
               
                 C25 
                 −5.88402712e−18 
                  3.19181834e−16 
                  8.70563351e−15 
               
               
                 C27 
                 −1.92557933e−18 
                  1.53807396e−16 
                  1.63908034e−14 
               
               
                 C29 
                  1.70059672e−21 
                  1.40780709e−19 
                  1.39069823e−18 
               
               
                 C31 
                  3.75540269e−21 
                  4.85996976e−19 
                 −1.28410259e−18 
               
               
                 C33 
                  3.28133541e−21 
                  5.1910323e−19 
                  4.8095941e−17 
               
               
                 C35 
                  8.57809825e−22 
                  2.15178451e−19  
                  4.41927219e−17 
               
               
                 C36 
                 −8.85938941e−25 
                  4.80137725e−23 
                 −6.58463052e−22 
               
               
                 C38 
                 −4.20002708e−24 
                  5.52918171e−22  
                 −1.31151539e−20 
               
               
                 C40 
                 −5.24288951e−24 
                  7.37589979e−22 
                  3.29070838e−20 
               
               
                 C42 
                 −3.32443155e−24 
                  7.62607475e−22 
                  2.45737341e−19 
               
               
                 C44 
                 −8.41638073e−25 
                  2.11429097e−22 
                  1.98567595e−19 
               
               
                 C46 
                  7.40583899e−28 
                  2.94044566e−25 
                  −2.1351782e−24 
               
               
                 C48 
                  2.7860108e−27 
                  1.65594542e−24  
                  5.42339274e−23 
               
               
                 C50 
                  4.05802066e−27  
                  2.67363596e−24 
                  9.40249237e−22 
               
               
                 C52 
                  1.8873941e−27 
                  1.45438443e−24  
                  1.40511532e−21 
               
               
                 C54 
                  1.32906947e−28 
                 −1.74731802e−25 
                  8.67008547e−22 
               
               
                 C55 
                 −2.72625411e−31 
                  4.57055919e−29 
                   1.975511e−26 
               
               
                 C57 
                 −1.09517773e−30 
                  8.24315234e−28 
                   3.5245026e−25 
               
               
                 C59 
                 −1.54140059e−30 
                  2.7846066e−27  
                  1.86064293e−24 
               
               
                 C61 
                 −2.03920564e−30 
                  5.04844296e−27  
                  5.56594105e−24 
               
               
                 C63 
                 −1.39151659e−30 
                  2.65275439e−27 
                  4.93123257e−24 
               
               
                 C65 
                 −3.04302425e−31 
                  4.47315051e−28  
                  2.25513424e−24 
               
               
                 C67 
                  2.65932555e−34 
                   0 
                   0 
               
               
                 C69 
                  1.07192285e−33 
                   0 
                   0 
               
               
                 C71 
                  1.59913365e−33 
                   0 
                   0 
               
               
                 C73 
                  9.28830744e−34 
                   0 
                   0 
               
               
                 C75 
                  2.99613864e−34 
                   0 
                   0 
               
               
                 C77 
                 −2.87821803e−35 
                   0 
                   0 
               
               
                 C78 
                 −1.91467081e−37 
                   0 
                   0 
               
               
                 C80 
                 −1.59911782e−36 
                   0 
                   0 
               
               
                 C82 
                 −4.94780249e−36 
                   0 
                   0 
               
               
                 C84 
                 −7.14686431e−36 
                   0 
                   0 
               
               
                 C86 
                 −5.51076275e−36 
                   0 
                   0 
               
               
                 C88 
                 −2.16822816e−36 
                   0 
                   0 
               
               
                 C90 
                 −4.19310084e−37 
                   0 
                   0 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
             
               
               
               
               
               
             
           
               
                 TABLE 3b 
               
             
             
               
                   
               
               
                 for FIG. 5 
               
             
          
           
               
                   
                 Coefficient 
                 M4 
                 M3 
                 M2 
               
               
                   
                   
               
               
                   
                 KY 
                   0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                   
                 KX 
                   0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                   
                 RX 
                 −5959.73835900 
                 0.00000000 
                 0.00000000 
               
               
                   
                 C7 
                  7.09371063e−08 
                 0 
                 0 
               
               
                   
                 C9 
                  1.9620957e−07 
                 0 
                 0 
               
               
                   
                 C10 
                 −5.80501996e−12 
                 0 
                 0 
               
               
                   
                 C12 
                  1.02443869e−10 
                 0 
                 0 
               
               
                   
                 C14 
                 −1.92463151e−11 
                 0 
                 0 
               
               
                   
                 C16 
                  1.52210927e−14 
                 0 
                 0 
               
               
                   
                 C18 
                  1.53632928e−14 
                 0 
                 0 
               
               
                   
                 C20 
                  5.26048968e−13 
                 0 
                 0 
               
               
                   
                 C21 
                 −1.12436683e−17 
                 0 
                 0 
               
               
                   
                 C23 
                  1.73824765e−16 
                 0 
                 0 
               
               
                   
                 C25 
                 −2.15389944e−16 
                 0 
                 0 
               
               
                   
                 C27 
                  6.93749405e−16 
                 0 
                 0 
               
               
                   
                 C29 
                  7.32299538e−20 
                 0 
                 0 
               
               
                   
                 C31 
                 −8.96220063e−19 
                 0 
                 0 
               
               
                   
                 C33 
                  2.89314095e−18 
                 0 
                 0 
               
               
                   
                 C35 
                  3.66266246e−19 
                 0 
                 0 
               
               
                   
                 C36 
                  1.37832263e−22 
                 0 
                 0 
               
               
                   
                 C38 
                  4.81965046e−22 
                 0 
                 0 
               
               
                   
                 C40 
                 −7.84784597e−21 
                 0 
                 0 
               
               
                   
                 C42 
                 −4.14050678e−22 
                 0 
                 0 
               
               
                   
                 C44 
                 −6.21735194e−21 
                 0 
                 0 
               
               
                   
                 C46 
                 −8.56329267e−25 
                 0 
                 0 
               
               
                   
                 C48 
                 −5.86480301e−24 
                 0 
                 0 
               
               
                   
                 C50 
                  7.86836679e−24 
                 0 
                 0 
               
               
                   
                 C52 
                 −7.38234303e−23 
                 0 
                 0 
               
               
                   
                 C54 
                 −1.90896327e−23 
                 0 
                 0 
               
               
                   
                 C55 
                 −3.44134447e−27 
                 0 
                 0 
               
               
                   
                 C57 
                 −4.07630281e−26 
                 0 
                 0 
               
               
                   
                 C59 
                 −2.05268913e−26 
                 0 
                 0 
               
               
                   
                 C61 
                  7.40916254e−26 
                 0 
                 0 
               
               
                   
                 C63 
                 −1.66787506e−25 
                 0 
                 0 
               
               
                   
                 C65 
                 −9.99341642e−26 
                 0 
                 0 
               
               
                   
                   
               
             
          
         
       
     
         [0000]    
       
         
               
             
               
               
               
             
           
               
                 TABLE 3c 
               
             
             
               
                   
               
               
                 for FIG. 5 
               
             
          
           
               
                   
                 Coefficient 
                 M1 
               
               
                   
                   
               
               
                   
                 KY 
                 0.00000000 
               
               
                   
                 KX 
                 0.00000000 
               
               
                   
                 RX 
                 0.00000000 
               
               
                   
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 4a for FIG. 5 
               
               
                   
               
               
                 Surface 
                 DCX 
                 DCY 
                 DCZ 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 Image plane 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 M7 
                 0.00000000 
                 0.00000000 
                 1294.60000000 
               
               
                 M6 
                 0.00000000 
                 0.00000000 
                 121.16860083 
               
               
                 M5 
                 0.00000000 
                 −23.39645080 
                 1255.70266623 
               
               
                 M4 
                 0.00000000 
                 428.84722309 
                 176.16839633 
               
               
                 M3 
                 0.00000000 
                 643.29322055 
                 973.30911463 
               
               
                 M2 
                 0.00000000 
                 877.39404910 
                 1272.63636377 
               
               
                 M1 
                 −0.00000000 
                 985.69698677 
                 1709.40915790 
               
               
                 Object plane 
                 −0.00000000 
                 972.97083537 
                 2079.13057086 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 4b for FIG. 5 
               
               
                   
               
               
                 Surface 
                 TLA[deg] 
                 TLB[deg] 
                 TLC[deg] 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 Image plane 
                 −0.00000000 
                 0.00000000 
                 −0.00000000 
               
               
                 M7 
                 −0.00000000 
                 0.00000000 
                 −0.00000000 
               
               
                 M6 
                 180.07648095 
                 0.00000000 
                 −0.00000000 
               
               
                 M5 
                 10.52960478 
                 0.00000000 
                 −0.00000000 
               
               
                 M4 
                 184.02255945 
                 0.00000000 
                 −0.00000000 
               
               
                 M3 
                 64.02255945 
                 0.00000000 
                 180.00000000 
               
               
                 M2 
                 244.02255945 
                 −0.00000000 
                 0.00000000 
               
               
                 M1 
                 84.02255945 
                 −0.00000000  
                 180.00000000 
               
               
                 Object plane 
                 −11.95488111 
                 0.00000000 
                 180.00000000 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 5 for FIG. 5 
               
               
                   
               
               
                   
                 Surface 
                 AOI[deg] 
                 Reflectivity 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                   
                 M7 
                 0.00000000 
                 0.66565840 
               
               
                   
                 M6 
                 0.07648095 
                 0.66566255 
               
               
                   
                 M5 
                 11.18955982 
                 0.65169152 
               
               
                   
                 M4 
                 18.22917890 
                 0.62398638 
               
               
                   
                 M3 
                 77.94883571 
                 0.85008675 
               
               
                   
                 M2 
                 77.94883571 
                 0.85008675 
               
               
                   
                 M1 
                 97.94883571 
                 1.13089334 
               
               
                   
                 Overall transmission 
                   
                 0.1473 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
             
               
               
               
             
           
               
                 TABLE 6 for FIG. 5 
               
               
                   
               
               
                 X[mm] 
                 Y[mm] 
                 Z[mm] 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 0.00000000 
                 594.49311802 
                 −114.82371082 
               
               
                 93.01621208 
                 587.28124992 
                 −114.60806119 
               
               
                 183.83820338 
                 565.79581204 
                 −113.99060454 
               
               
                 270.29866175 
                 530.49099318 
                 −113.05582694 
               
               
                 350.29086890 
                 482.13401886 
                 −111.93168041 
               
               
                 421.81384811 
                 421.81384811 
                 −110.77184822 
               
               
                 483.02993602 
                 350.94179082 
                 −109.73400756 
               
               
                 532.33125383 
                 271.23632139 
                 −108.95707827 
               
               
                 568.40749899 
                 184.68679191 
                 −108.54096691 
               
               
                 590.30508838 
                 93.49514104 
                 −108.53242876 
               
               
                 597.46792407 
                 0.00000000 
                 −108.92018472 
               
               
                 589.75339789 
                 −93.40776185 
                 −109.64091015 
               
               
                 567.42315516 
                 −184.36695921 
                 −110.59493328 
               
               
                 531.11439345 
                 −270.61630005 
                 −111.66734917 
               
               
                 481.80099693 
                 −350.04891430 
                 −112.74857877 
               
               
                 420.75295187 
                 −420.75295187 
                 −113.74927261 
               
               
                 349.49841703 
                 −481.04330244 
                 −114.60719325 
               
               
                 269.78833350 
                 −529.48941760 
                 −115.28660147 
               
               
                 183.56074169 
                 −564.94187277 
                 −115.77246418 
               
               
                 92.90157512 
                 −586.55746064 
                 −116.06233121 
               
               
                 0.00000000 
                 −593.82052455 
                 −116.15847788 
               
               
                 −92.90157512 
                 −586.55746064 
                 −116.06233121 
               
               
                 −183.56074169 
                 −564.94187277 
                 −115.77246418 
               
               
                 −269.78833350 
                 −529.48941760 
                 −115.28660147 
               
               
                 −349.49841703 
                 −481.04330244 
                 −114.60719325 
               
               
                 −420.75295187 
                 −420.75295187 
                 −113.74927261 
               
               
                 −481.80099693 
                 −350.04891430 
                 −112.74857877 
               
               
                 −531.11439345 
                 −270.61630005 
                 −111.66734917 
               
               
                 −567.42315516 
                 −184.36695921 
                 −110.59493328 
               
               
                 −589.75339789 
                 −93.40776185 
                 −109.64091015 
               
               
                 −597.46792407 
                 −0.00000000 
                 −108.92018472 
               
               
                 −590.30508838 
                 93.49514104 
                 −108.53242876 
               
               
                 −568.40749899 
                 184.68679191 
                 −108.54096691 
               
               
                 −532.33125383 
                 271.23632139 
                 −108.95707827 
               
               
                 −483.02993602 
                 350.94179082 
                 −109.73400756 
               
               
                 −421.81384811 
                 421.81384811 
                 −110.77184822 
               
               
                 −350.29086890 
                 482.13401886 
                 −111.93168041 
               
               
                 −270.29866175 
                 530.49099318 
                 −113.05582694 
               
               
                 −183.83820338 
                 565.79581204 
                 −113.99060454 
               
               
                 −93.01621208 
                 587.28124992 
                 −114.60806119 
               
               
                   
               
             
          
         
       
     
         [0170]    An overall reflectivity of the projection optical unit  22  is 11.89%. 
         [0171]    The projection optical unit  22  has a reducing imaging scale of 8×(β=8). 
         [0172]    The image field  8  has an x-extent of two times 6.5 mm and a y-extent of 1 mm. The projection optical unit  22  is optimized for an operating wavelength of the illumination light  3  of 13.5 nm. 
         [0173]    In the region of, on the one hand, the mirrors M 1  and M 2  and, on the other hand, the mirrors M 4  to M 7 , the beam path of the projection optical unit  22  corresponds qualitatively to that from the projection optical unit  20  according to  FIG. 3 . In contrast to the projection optical unit  20 , a further mirror M 3  for grazing incidence is arranged between the mirror M 2  for grazing incidence and the mirror M 4  for normal incidence in the projection optical unit  22 . Compared to the deflecting effect of the mirrors M 1  and M 2  for grazing incidence, this further mirror causes a reverse deflection of the imaging light  3  toward the mirror M 4  in such a way that, unlike in the case of the projection optical unit  20 , the object plane  5  in the projection optical unit  22  is not arranged with such a strong tilt with respect to the image plane  9 . Alternatively, the projection optical unit  22  can also be embodied in such a way that the object plane  5  is arranged parallel to the image plane  9 . The mirrors M 1  and M 2  once again form a pair of mirrors for grazing incidence, arranged directly behind one another in the beam path of the imaging light  3 . 
         [0174]    A further difference in the guidance of the imaging light  3  in the projection optical unit  22  compared to in the projection optical unit  20  lies in the fact that the mirror M 7  includes a passage opening  17  for the imaging light  3  between the mirrors M 4  and M 5  on the one hand and the mirrors M 5  and M 6  on the other hand. A reflection surface of the mirror M 5  is arranged recessed relative to this passage opening  17  in the mirror M 7 . 
         [0175]    The mirrors M 1 , M 3 , M 4  and M 7  have negative values for the radius, i.e. are, in principle, concave mirrors. The mirrors M 2 , M 5  and M 6  have positive values for the radius, i.e. are, in principle, convex mirrors. 
         [0176]    The mirrors M 6  and M 7  respectively have a passage opening  17  for the imaging light  3 . The other mirrors M 1  to M 5  do not have passage openings for the imaging light  3 . 
         [0177]    The reflection surfaces of the mirrors M 6  and M 7  are used around the respective passage opening  17  thereof. 
         [0178]    In the projection optical unit  22 , an aperture stop is arranged on the mirror M 7 . The polygon data in accordance with preceding Table 6 for  FIG. 5  relate thereto. 
         [0179]    In the projection optical unit  22 , a z-distance between the object plane and the image plane  9  is approximately 2200 mm. 
         [0180]    A typical diameter of the largest mirror M 7  is approximately 1350 mm. In the projection optical unit  22 , an object/image offset d OIS  is approximately 1050 mm. In the projection optical unit  22 , the object field-side chief rays  16  also include an angle CRAO of 5.5° with a normal of the object plane  5 . 
         [0181]    The projection optical unit  22  has a scanned RMS value of the image field-side wavefront which is approximately 100 mλ. An image field-side distortion value is approximately 2 nm in the projection optical unit  22 . In the projection optical unit  22 , an image-side telecentricity value in the x-direction is less than 2 mrad. In the projection optical unit  22 , an image-side telecentricity value in the y-direction is less than 0.5 mrad. 
         [0182]    In the projection optical unit  22 , the chief rays  16  propagate divergently with respect to one another between the object field  4  and the mirror M 1 . 
         [0183]    The mirror M 6  defines an image-side obscuration in the x-dimension which is less than 26% of the image-side numerical aperture of the projection optical unit  22 . In the y-direction, the obscuration is significantly smaller and moreover decentered. 
         [0184]    A further embodiment of a projection optical unit  23 , which can be used in the projection exposure apparatus  1  according to  FIG. 1  instead of e.g. the projection optical unit  7 , is explained in the following text on the basis of  FIG. 6 . Components and functions which were already explained above in the context of  FIGS. 1 to 5  are appropriately denoted by the same reference signs and are not discussed again in detail. 
         [0185]    Overall, the projection optical unit  23  has eight mirrors M 1  to M 8 . Of these, the mirrors M 1 , M 4 , M 7  and M 8  are embodied as mirrors for normal incidence and the mirrors M 2 , M 3  as well as M 5  and M 6  are embodied as mirrors for grazing incidence. The mirrors M 1  to M 8  are configured as free-form surfaces, for which the free-form surface equation (1), specified above, applies. The optical design data from the projection optical unit  23  can be gathered from the following tables, which, in terms of their design, correspond to the tables for the projection optical unit  7  according to  FIG. 2 . The specification “stop S 8 ” in Table 1 for  FIG. 6  means that the stop is arranged at the location of the eighth surface of the design surfaces, counted including the image plane (cf. in this respect Tables 4a, 4b for  FIG. 6 ). Corresponding specifications concerning the location of the stop can also be found in the described embodiments of the projection optical unit still to follow. 
         [0000]    
       
         
               
               
               
             
               
               
               
               
             
               
               
               
             
           
               
                 TABLE 1 for FIG. 6 
               
               
                   
               
               
                   
                 Exemplary embodiment 
                 FIG. 6 
               
               
                   
               
             
             
               
                   
                 NA 
                 0.45 
               
             
          
           
               
                   
                 Wavelength 
                 13.5 
                 nm 
               
               
                   
                 Field dimension x 
                 13.0 
                 mm 
               
               
                   
                 Field dimension y 
                 0.784 
                 mm 
               
               
                   
                 Feldkruemmung 
                 0.0 
                 1/mm 
               
             
          
           
               
                   
                 Stop 
                 S8 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
               
               
             
               
               
               
               
               
               
             
           
               
                 TABLE 2 for FIG. 6 
               
               
                   
               
               
                 Surface 
                 Radius_x[mm] 
                 Power_x[1/mm] 
                 Radius_y[mm] 
                 Power_y[1/mm] 
                 Operating 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 M8 
                 −958.97089575 
                 0.00207686 
                 −961.85646760 
                 0.00208803 
                 REFL 
               
               
                 M7 
                 781.70184576 
                 −0.00255743 
                 800.14521302 
                 −0.00250061 
                 REFL 
               
               
                 M6 
                 2530.53650030 
                 −0.00017248 
                 1099.72037229 
                 −0.00833342 
                 REFL 
               
               
                 M5 
                 −959.51707616 
                 0.00053343 
                 −5824.08776793 
                 0.00134184 
                 REFL 
               
               
                 M4 
                 −1015.89947977 
                 0.00190347 
                 −1037.47638976 
                 0.00199381 
                 REFL 
               
               
                 M3 
                 −1396.79419984 
                 0.00025079 
                 5530.47714724 
                 −0.00206466 
                 REFL 
               
               
                 M2 
                 453.37653174 
                 −0.00134551 
                 3069.00502651 
                 −0.00213656 
                 REFL 
               
               
                 M1 
                 −1105.89546966 
                 0.00175044 
                 −898.04924515 
                 0.00230091 
                 REFL 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 3a for FIG.6 
               
               
                   
               
               
                 Coefficient 
                 M8 
                 M7 
                 M6 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 KY 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 KX 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 RX 
                 −958.97089570 
                 781.70184580 
                 2530.53650000 
               
               
                 C7 
                 −6.24261885e−09 
                 −4.79337518e−07 
                  −7.1009777e−07 
               
               
                 C9 
                   3.40176704e−09 
                  −2.2271152e−08 
                  −8.2763755e−07 
               
               
                 C10 
                 −9.52920854e−12 
                   1.39847445e−09 
                 −5.28790727e−09 
               
               
                 C12 
                 −2.17138503e−11 
                   2.59902235e−09 
                 −5.83047016e−09 
               
               
                 C14 
                 −5.53794085e−12 
                   3.82503297e−10 
                   3.85928616e−09 
               
               
                 C16 
                 −4.89194598e−15 
                  −7.5682079e−13 
                   4.16412253e−11 
               
               
                 C18 
                 −5.31097983e−15 
                    2.0123627e−13 
                   3.27030642e−11 
               
               
                 C20 
                   3.35556271e−15 
                   1.18707056e−12 
                 −1.69195332e−11 
               
               
                 C21 
                 −1.29683082e−17 
                   6.50353918e−15 
                 −1.04672087e−14 
               
               
                 C23 
                  −4.0507372e−17 
                   1.51137687e−14 
                 −2.41277384e−14 
               
               
                 C25 
                 −3.91228171e−17 
                   1.36743637e−14 
                 −2.38109022e−13 
               
               
                 C27 
                 −8.22368178e−18 
                   2.04416547e−15 
                   9.07489874e−14 
               
               
                 C29 
                 −4.09694624e−21 
                 −2.41814134e−18 
                   4.54711839e−16 
               
               
                 C31 
                 −8.94104942e−21 
                 −2.23789497e−19 
                 −8.11985983e−16 
               
               
                 C33 
                 −2.65451858e−21 
                   1.31365906e−17 
                   1.31994251e−15 
               
               
                 C35 
                   3.82604616e−21 
                   1.24161702e−17 
                 −6.01734444e−16 
               
               
                 C36 
                 −1.25909252e−23 
                   5.60405318e−20 
                  −1.9034482e−18 
               
               
                 C38 
                 −5.04636427e−23 
                    1.727638e−19 
                 −1.29641861e−17 
               
               
                 C40 
                 −7.58006457e−23 
                   2.38455591e−19 
                   6.23929199e−18 
               
               
                 C42 
                 −4.61626479e−23 
                   9.83846873e−20 
                  −1.3014572e−17 
               
               
                 C44 
                 −8.32692765e−24 
                   3.34129348e−20 
                   5.06711727e−18 
               
               
                 C46 
                 −8.53689744e−27 
                 0 
                 0 
               
               
                 C48 
                 −2.77252948e−26 
                 0 
                 0 
               
               
                 C50 
                 −2.88379308e−26 
                 0 
                 0 
               
               
                 C52 
                 −3.62035322e−27 
                 0 
                 0 
               
               
                 C54 
                    6.3984309e−27 
                 0 
                 0 
               
               
                 C55 
                 −2.76049035e−29 
                 0 
                 0 
               
               
                 C57 
                 −1.41544439e−28 
                 0 
                 0 
               
               
                 C59 
                 −2.85021143e−28 
                 0 
                 0 
               
               
                 C61 
                 −2.76943917e−28 
                 0 
                 0 
               
               
                 C63 
                 −1.24085088e−28 
                 0 
                 0 
               
               
                 C65 
                 −1.81757986e−29 
                 0 
                 0 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 3b for FIG. 6 
               
               
                   
               
               
                 Coefficient 
                 M5 
                 M4 
                 M3 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 KY 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 KX 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 RX 
                 −959.51707620 
                 −1015.89948000  
                 −1396.79420000 
               
               
                 C7 
                 −4.08359998e−07 
                 −2.15395805e−07 
                 −2.38764091e−07 
               
               
                 C9 
                    3.4748349e−08 
                   1.36820595e−07 
                   4.64016378e−08 
               
               
                 C10 
                 −9.13196608e−10 
                 −4.36123019e−11 
                 −4.14715679e−09 
               
               
                 C12 
                   9.44559924e−11 
                   1.25327362e−09 
                 −9.81520016e−10 
               
               
                 C14 
                 −5.88672435e−11 
                 −1.25208732e−10 
                   2.37258013e−11 
               
               
                 C16 
                 −1.87521812e−12 
                 −2.06101634e−12 
                   9.14454531e−12 
               
               
                 C18 
                 −1.37465885e−12 
                 −6.89740416e−12 
                   2.95923304e−12 
               
               
                 C20 
                    1.1992969e−13 
                   1.04902531e−12 
                   3.68847523e−13 
               
               
                 C21 
                 −4.39551393e−14 
                 −5.27163213e−17 
                 −2.48685307e−13 
               
               
                 C23 
                 −6.94239353e−15 
                   2.41662997e−14 
                 −1.22998777e−13 
               
               
                 C25 
                   1.42589153e−15 
                   4.92614883e−14 
                 −1.38722747e−14 
               
               
                 C27 
                   4.24263352e−17 
                 −2.58241283e−14 
                   1.75833705e−17 
               
               
                 C29 
                   1.63548588e−16 
                 −3.62334861e−17 
                    1.422768e−15 
               
               
                 C31 
                   9.81035253e−17 
                 −3.34821808e−16 
                   5.43158823e−16 
               
               
                 C33 
                 −7.95045663e−18 
                 −1.33308143e−16 
                   6.79918691e−17 
               
               
                 C35 
                 −5.12592669e−19 
                 −4.92438934e−16 
                   6.81835572e−19 
               
               
                 C36 
                    6.9842749e−19 
                   2.51610148e−21 
                  −5.8931813e−18 
               
               
                 C38 
                 −1.66279358e−19 
                    7.3298455e−19  
                 −6.55610075e−18 
               
               
                 C40 
                 −6.28447234e−19 
                   1.69443664e−18  
                 −1.55271887e−18 
               
               
                 C42 
                   2.04767376e−20 
                 −3.36811757e−19 
                 −1.30349519e−19 
               
               
                 C44 
                   2.18932434e−21 
                 −1.74132521e−17 
                   1.24548926e−20 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
             
               
               
               
             
           
               
                 TABLE 3c for FIG. 6 
               
               
                   
               
               
                 Coefficient 
                 M2 
                 M1 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 KY 
                 0.00000000 
                 0.00000000 
               
               
                 KX 
                 0.00000000 
                 0.00000000 
               
               
                 RX 
                 453.37653170 
                 −1105.89547000 
               
               
                 C7 
                 −3.64021023e−06 
                 −1.53061966e−08 
               
               
                 C9 
                  −4.1440416e−07 
                   2.02696728e−07 
               
               
                 C10 
                   1.73428138e−10  
                    5.3320966e−11 
               
               
                 C12 
                   1.50361672e−08  
                   3.69218174e−10 
               
               
                 C14 
                   8.05092825e−11 
                 −4.33240146e−11 
               
               
                 C16 
                   3.86788386e−11 
                   6.58986798e−14 
               
               
                 C18 
                 −6.30736684e−11 
                 −9.56533957e−13 
               
               
                 C20 
                   3.23174009e−12 
                   1.76624492e−15 
               
               
                 C21 
                   1.06689208e−13 
                 −2.93652599e−17 
               
               
                 C23 
                  −9.8827162e−14 
                 −1.44343666e−15 
               
               
                 C25 
                   2.53626119e−13 
                   4.60503135e−15 
               
               
                 C27 
                 −6.71346795e−17  
                   3.22197521e−15 
               
               
                 C29 
                 −3.85691883e−16  
                    7.4131948e−19 
               
               
                 C31 
                 −8.34354289e−17  
                   1.97074044e−17 
               
               
                 C33 
                 −1.00493209e−15 
                 −4.84993134e−19 
               
               
                 C35 
                 −9.32551743e−18 
                    1.5674206e−18 
               
               
                 C36 
                   3.32160664e−18 
                 −2.75117422e−22 
               
               
                 C38 
                   2.42658882e−18 
                   1.69392814e−21 
               
               
                 C40 
                   8.35990203e−19 
                 −9.62768209e−20 
               
               
                 C42 
                   2.82957021e−18 
                 −4.99071337e−20 
               
               
                 C44 
                 −2.18809094e−19 
                 −2.52307032e−19 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 4a for FIG. 6 
               
               
                   
               
               
                 Surface 
                 DCX 
                 DCY 
                 DCZ 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 Image plane 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 M8 
                 0.00000000 
                 0.00000000 
                 857.25842051 
               
               
                 M7 
                 0.00000000 
                 143.72846278 
                 78.92107486 
               
               
                 M6 
                 0.00000000 
                 −97.73260418 
                 1061.22710854 
               
               
                 M5 
                 0.00000000 
                 −310.85339013 
                 1324.12983099 
               
               
                 M4 
                 0.00000000 
                 −415.10458760 
                 1955.31068719 
               
               
                 M3 
                 0.00000000 
                 −109.21713535  
                 1576.99752720 
               
               
                 Stop 
                 0.00000000 
                 53.83767037 
                 1451.75625757 
               
               
                 M2 
                 0.00000000 
                 233.83461505 
                 1371.94162077 
               
               
                 M1 
                 0.00000000 
                 434.90609681 
                 911.92780520 
               
               
                 Object plane 
                 0.00000000  
                 524.23007379 
                 1839.29231153 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
               
             
               
               
               
               
               
             
           
               
                   
                 TABLE 4b for FIG. 6 
               
               
                   
                   
               
               
                   
                 Surface 
                 TLA[deg] 
                 TLB[deg] 
                 TLC[deg] 
               
               
                   
                   
               
             
             
               
                   
               
             
          
           
               
                   
                 Image plane 
                 −0.00000000 
                 0.00000000 
                 −0.00000000 
               
               
                   
                 M8 
                 5.23773203 
                 0.00000000 
                 −0.00000000 
               
               
                   
                 M7 
                 192.16152597 
                 0.00000000 
                 −0.00000000 
               
               
                   
                 M6 
                 −63.56651549 
                 0.00000000 
                 −0.00000000 
               
               
                   
                 M5 
                 114.20489964 
                 0.00000000 
                 −0.00000000 
               
               
                   
                 M4 
                 24.16726666 
                 0.00000000 
                 −0.00000000 
               
               
                   
                 M3 
                 139.04415820 
                 0.00000000 
                 −0.00000000 
               
               
                   
                 Stop 
                 238.00000000 
                 0.00000000 
                 −0.00000000 
               
               
                   
                 M2 
                 −48.62779604 
                 0.00000000 
                 −0.00000000 
               
               
                   
                 M1 
                 189.05463777 
                 0.00000000 
                 −0.00000000 
               
               
                   
                 Object plane 
                 −0.00000000 
                 0.00000000 
                 −0.00000000 
               
               
                   
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 5 for FIG. 6 
               
               
                   
               
               
                   
                 Surface 
                 Angle of incidence 
                 Reflectivity 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                   
                 M8 
                 5.23773203 
                 0.66285728 
               
               
                   
                 M7 
                 1.67316319 
                 0.66544123 
               
               
                   
                 M6 
                 77.39460590 
                 0.84197074 
               
               
                   
                 M5 
                 75.17194229 
                 0.80679858 
               
               
                   
                 M4 
                 14.78988644 
                 0.63989082 
               
               
                   
                 M3 
                 79.91239948 
                 0.87714614 
               
               
                   
                 M2 
                 72.24113995 
                 0.75250143 
               
               
                   
                 M1 
                 14.55657686 
                 0.64079353 
               
               
                   
                 Overall transmission 
                   
                 0.0811 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
             
               
               
               
             
           
               
                 TABLE 6 for FIG. 6 
               
               
                   
               
               
                 X[mm] 
                 Y[mm] 
                 Z[mm] 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 0.00000000 
                 −42.55550630 
                 0.00000000 
               
               
                 −5.71360072 
                 −42.41904079 
                 0.00000000 
               
               
                 −11.28570917 
                 −42.00337327 
                 0.00000000 
               
               
                 −16.57923089 
                 −41.29199297 
                 0.00000000 
               
               
                 −21.46534853 
                 −40.26432853 
                 0.00000000 
               
               
                 −25.82651690 
                 −38.90419369 
                 0.00000000 
               
               
                 −29.55850056 
                 −37.20856137 
                 0.00000000 
               
               
                 −32.57173218 
                 −35.19456381 
                 0.00000000 
               
               
                 −34.79247198 
                 −32.90306161 
                 0.00000000 
               
               
                 −36.16417382 
                 −30.39803509 
                 0.00000000 
               
               
                 −36.64920435 
                 −27.76194540 
                 0.00000000 
               
               
                 −36.23077173 
                 −25.08805998 
                 0.00000000 
               
               
                 −34.91468027 
                 −22.47140643 
                 0.00000000 
               
               
                 −32.73039949 
                 −20.00022495 
                 0.00000000 
               
               
                 −29.73098648 
                 −17.74953050 
                 0.00000000 
               
               
                 −25.99165105 
                 −15.77778545 
                 0.00000000 
               
               
                 −21.60711600 
                 −14.12677772 
                 0.00000000 
               
               
                 −16.68821822 
                 −12.82386652 
                 0.00000000 
               
               
                 −11.35826608 
                 −11.88531994 
                 0.00000000 
               
               
                 −5.74952640 
                 −11.31971544 
                 0.00000000 
               
               
                 −0.00000000 
                 −11.13084157 
                 0.00000000 
               
               
                 5.74952640 
                 −11.31971544 
                 0.00000000 
               
               
                 11.35826608 
                 −11.88531994 
                 0.00000000 
               
               
                 16.68821822 
                 −12.82386652 
                 0.00000000 
               
               
                 21.60711600 
                 −14.12677772 
                 0.00000000 
               
               
                 25.99165105 
                 −15.77778545 
                 0.00000000 
               
               
                 29.73098648 
                 −17.74953050 
                 0.00000000 
               
               
                 32.73039949 
                 −20.00022495 
                 0.00000000 
               
               
                 34.91468027 
                 −22.47140643 
                 0.00000000 
               
               
                 36.23077173 
                 −25.08805998 
                 0.00000000 
               
               
                 36.64920435 
                 −27.76194540 
                 0.00000000 
               
               
                 36.16417382 
                 −30.39803509 
                 0.00000000 
               
               
                 34.79247198 
                 −32.90306161 
                 0.00000000 
               
               
                 32.57173218 
                 −35.19456381 
                 0.00000000 
               
               
                 29.55850056 
                 −37.20856137 
                 0.00000000 
               
               
                 25.82651690 
                 −38.90419369 
                 0.00000000 
               
               
                 21.46534853 
                 −40.26432853 
                 0.00000000 
               
               
                 16.57923089 
                 −41.29199297 
                 0.00000000 
               
               
                 11.28570917 
                 −42.00337327 
                 0.00000000 
               
               
                 5.71360072 
                 −42.41904079 
                 0.00000000 
               
               
                   
               
             
          
         
       
     
         [0186]    An overall reflectivity of the projection optical unit  23  is 8.11%. 
         [0187]    The projection optical unit  23  has a reducing imaging scale of 8×(β=8). 
         [0188]    The image field  8  has an x-extent of two times 6.5 mm and a y-extent of 1 mm. The projection optical unit  23  is optimized for an operating wavelength of the illumination light  3  of 13.5 nm. 
         [0189]    Deviating from the other projection optical units, the projection optical unit  23  has an image-side numerical aperture of 0.45. 
         [0190]    A beam path of the imaging light  3  through the projection optical unit  23  between the mirror M 6  and the image field  8  corresponds qualitatively to the beam path between the mirror M 6  and the image field  8  in the projection optical unit  7  according to  FIG. 2 , albeit mirrored about a plane parallel to the xz-plane. 
         [0191]    The mirrors M 2  and M 3 , on the one hand, and the mirrors M 5  and M 6 , on the other hand, for grazing incidence are arranged in such a way that they have a respective reverse deflecting effect, that is to say that the deflecting effect of the respective second mirror M 3  and M 6  of these mirror pairs M 2 , M 3  and M 5 , M 6  is subtracted from the deflecting effect of the respective first mirror M 2  and M 5 . In respect of in each case one of the mirrors M 2  and M 3 , the mirrors M 5  and M 6  have a reverse dependence on the reflectivity for respective individual rays  15  of the imaging light  3 , i.e. these represent compensation mirrors such that the four mirrors M 2 , M 3 , M 5  and M 6  for grazing incidence do not have an undesired overall dependence on the reflectivity over the image field  8  or over the illumination angle distribution thereof. 
         [0192]    A pupil plane of the projection optical unit  23  lies in the region of the deflection on the mirror M 2 . An aperture stop effective for the x-dimension can be arranged in the beam path of the imaging light  3  between the mirrors M 1  and M 2 , adjacent to M 2 . An aperture stop acting in the y-dimension can be arranged in the beam path of the imaging light  3  between the mirrors M 2  and M 3 , once again adjacent to the mirror M 2 . An intermediate image plane of the projection optical unit  23  lies in the region of the deflection on the mirror M 5 . A further pupil plane lies in the beam path of the imaging light  3  between the mirrors M 7  and M 8 . There, an aperture stop effective for the x-dimension can likewise be arranged. 
         [0193]    In sections, the mirrors M 1  and M 8  are embodied back-to-back. 
         [0194]    Only the mirror M 8  has a passage opening  17  for the passage of imaging light  3  in the imaging beam path between the mirrors M 6  and M 7 . 
         [0195]    The mirrors M 1 , M 4 , M 5  and M 8  have negative values for the radius, i.e. are, in principle, concave mirrors. The mirrors M 2 , M 3 , M 6  and M 7  have positive values for the radius, i.e. are, in principle, convex mirrors. The mirrors M 2 , M 3  and M 5  have very large absolute radii, i.e. only constitute small deviations from plane reflection surfaces. 
         [0196]    A z-distance between the object plane  5  and the image plane  9  is approximately 1840 mm in the projection optical unit  23 . 
         [0197]    A typical diameter of the largest mirror M 8  is approximately 800 mm. 
         [0198]    In the projection optical unit  23 , an object/image offset d OIS  is approximately 520 mm. In the projection optical unit  23 , the object field-side chief rays  16  also include an angle CRAO of 5.5° with a normal of the object plane  5 . 
         [0199]    The projection optical unit  23  has a scanned RMS value of the image field-side wavefront which is less than 70 mλ. An image field-side distortion value is approximately 1.2 nm in the projection optical unit  23 . 
         [0200]    In the projection optical unit  23 , the chief rays  16  propagate divergently with respect to one another between the object field  4  and the mirror M 1 . 
         [0201]    The mirror M 8  defines an image-side obscuration in the x-dimension which is less than 20% of the image-side numerical aperture of the projection optical unit  23 . In the y-direction, the obscuration is significantly smaller and moreover decentered. 
         [0202]    A further embodiment of a projection optical unit  24 , which can be used in the projection exposure apparatus  1  according to  FIG. 1  instead of e.g. the projection optical unit  7 , is explained in the following text on the basis of  FIG. 7 . Components and functions which were already explained above in the context of  FIGS. 1 to 6  are appropriately denoted by the same reference signs and are not discussed again in detail. 
         [0203]    The imaging beam path of the projection optical unit  24  corresponds qualitatively to that of the projection optical unit  23  according to  FIG. 6 . The projection optical unit  24  also includes eight mirrors M 1  to M 8 , of which the mirrors M 1 , M 4 , M 7  and M 8  are embodied as mirrors for normal incidence and the mirrors M 2 , M 3 , M 5  and M 6  are embodied as mirrors for grazing incidence. The deflecting effects of the mirrors M 2  and M 3  on the one hand, and M 5  and M 6  on the other hand are subtracted from one another. 
         [0204]    The mirrors M 1  to M 8  are configured as free-form surfaces, for which the free-form surface equation (1), specified above, applies. The optical design data from the projection optical unit  24  can be gathered from the following tables, which, in terms of their design, correspond to the tables for the projection optical unit  7  according to  FIG. 2 . 
         [0000]    
       
         
               
               
               
             
               
               
               
               
             
               
               
               
             
           
               
                 TABLE 1 for FIG. 7 
               
               
                   
               
               
                   
                 Exemplary embodiment 
                 FIG. 7 
               
               
                   
               
             
             
               
                   
                 NA 
                 0.45 
               
             
          
           
               
                   
                 Wavelength 
                 13.5 
                 nm 
               
               
                   
                 Field dimension x 
                 13.0 
                 mm 
               
               
                   
                 Field dimension y 
                 0.784 
                 mm 
               
               
                   
                 Field curvature 
                 0.0 
                 1/mm 
               
             
          
           
               
                   
                 Stop 
                 S7 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
               
               
             
               
               
               
               
               
               
             
           
               
                 TABLE 2 for FIG. 7 
               
               
                   
               
               
                 Surface 
                 Radius x[mm] 
                 Power x[1/mm] 
                 Radius y[mm] 
                 Power y[1/mm] 
                 Operating 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 M8 
                 −828.90624658 
                 0.00240718 
                 −813.73184215 
                 0.00246356 
                 REFL 
               
               
                 M7 
                 452.59444650 
                 −0.00441888 
                 343.07524055 
                 −0.00582974 
                 REFL 
               
               
                 M6 
                 1112.77153576 
                 −0.00035436 
                 −8434.60343947 
                 0.00120266 
                 REFL 
               
               
                 M5 
                 −743.46091318 
                 0.00053356 
                 10280.07421667 
                 −0.00098089 
                 REFL 
               
               
                 M4 
                 −835.77975524 
                 0.00235223 
                 −929.01694099 
                 0.00219010 
                 REFL 
               
               
                 M3 
                 — 
                 0.00007233 
                 −4677.48375823 
                 0.00212963 
                 REFL 
               
               
                 M2 
                 — 
                 0.00023122 
                 1872.02689047 
                 −0.00534493 
                 REFL 
               
               
                 M1 
                 −880.94474613 
                 0.00217245 
                 −929.96827744 
                 0.00224746 
                 REFL 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 3a for FIG. 7 
               
               
                   
               
               
                 Coefficient 
                 M8 
                 M7 
                 M6 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 KY 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 KX 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 RX 
                 −828.90624660 
                 452.59444650 
                 1112.77153600 
               
               
                 C7 
                   6.74198948e−09 
                   1.8198381e−07 
                   4.73297971e−07 
               
               
                 C9 
                   3.90647354e−09 
                 −1.03077896e−07 
                   5.71100371e−08 
               
               
                 C10 
                 −1.60344671e−11 
                   5.15323975e−09 
                   2.05867386e−09 
               
               
                 C12 
                 −2.86549213e−11 
                    1.1999558e−08 
                 −8.29784809e−10 
               
               
                 C14 
                 −1.26862354e−11 
                   7.63575592e−09 
                 −9.58970523e−11 
               
               
                 C16 
                   4.78369091e−15 
                   1.39254302e−12 
                 −2.17825923e−11 
               
               
                 C18 
                   8.51266815e−15 
                   7.38520647e−12 
                    6.3635415e−13 
               
               
                 C20 
                   2.82358426e−15 
                 −2.36224044e−12 
                   1.31296379e−13 
               
               
                 C21 
                 −2.65461735e−17 
                   6.84835025e−14 
                 −1.01503317e−13 
               
               
                 C23 
                 −7.72188599e−17 
                   2.86517775e−13 
                   4.04729312e−14 
               
               
                 C25 
                 −7.21196735e−17 
                   3.43322922e−13 
                   5.59417154e−16 
               
               
                 C27 
                 −1.90211316e−17 
                   7.51227642e−14 
                 −1.51792851e−16 
               
               
                 C29 
                   4.92227907e−21 
                   4.09353362e−17 
                   2.54136872e−16 
               
               
                 C31 
                   1.20218531e−20 
                   1.27335094e−16 
                 −5.10416424e−17 
               
               
                 C33 
                   8.40798497e−21 
                   1.22660287e−16 
                 −2.15218211e−18 
               
               
                 C35 
                   3.23694092e−21 
                 −4.21844295e−17 
                   1.02982467e−19 
               
               
                 C36 
                 −3.28705775e−23 
                   1.68544205e−18 
                 −2.64826102e−19 
               
               
                 C38 
                  −1.3081706e−22 
                   9.48378409e−18 
                 −4.72935253e−19 
               
               
                 C40 
                 −1.91271179e−22 
                   1.93084784e−17 
                   1.36626279e−20 
               
               
                 C42 
                 −1.20985451e−22 
                   1.51684275e−17 
                   1.50910444e−21 
               
               
                 C44 
                 −2.87133882e−23 
                   5.71789768e−18 
                 −1.52076385e−23 
               
               
                 C46 
                   9.04401197e−27 
                 0 
                 0 
               
               
                 C48 
                   3.06652794e−26 
                 0 
                 0 
               
               
                 C50 
                   3.95339353e−26 
                 0 
                 0 
               
               
                 C52 
                   2.12427278e−26 
                 0 
                 0 
               
               
                 C54 
                   6.19479308e−27 
                 0 
                 0 
               
               
                 C55 
                 −9.56418704e−29 
                 0 
                 0 
               
               
                 C57 
                 −4.73070844e−28 
                 0 
                 0 
               
               
                 C59 
                 −9.34446589e−28 
                 0 
                 0 
               
               
                 C61 
                 −9.13157935e−28 
                 0 
                 0 
               
               
                 C63 
                 −4.41677071e−28 
                 0 
                 0 
               
               
                 C65 
                 −7.86181975e−29 
                 0 
                 0 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 3b for FIG. 7 
               
               
                   
               
               
                 Coefficient 
                 M5 
                 M4 
                 M3 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 KY 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 KX 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 RX 
                 −743.46091320 
                 −835.77975520 
                 −5551.96069600 
               
               
                 C7 
                   8.15313049e−07 
                   1.08411968e−06 
                    8.1725158e−08 
               
               
                 C9 
                   1.15936905e−07 
                   2.66713006e−07 
                   2.11082779e−08 
               
               
                 C10 
                 −2.17231701e−09 
                   1.97364815e−09 
                 −7.51877121e−09 
               
               
                 C12 
                   2.45410579e−09  
                   1.29311988e−09 
                   9.83512366e−10 
               
               
                 C14 
                   8.78996519e−10  
                   1.55808687e−08  
                 −1.39425604e−10 
               
               
                 C16 
                  −1.4388317e−11 
                 −7.24177347e−12 
                   1.61763526e−11 
               
               
                 C18 
                   2.43340771e−12  
                   3.70702943e−12 
                   1.05071826e−12 
               
               
                 C20 
                   8.01706893e−12 
                 −2.73262347e−10 
                 −1.62527109e−13 
               
               
                 C21 
                   2.02931387e−14 
                  −9.2131432e−15 
                   3.04337357e−13 
               
               
                 C23 
                 −2.63254556e−14 
                   5.85039506e−14  
                 −7.58462902e−14 
               
               
                 C25 
                 −5.41315246e−15 
                 −3.84690423e−13  
                 −1.81428849e−15 
               
               
                 C27 
                   6.80497633e−14  
                   4.35189326e−12  
                 −7.18902516e−16 
               
               
                 C29 
                 −7.38761627e−18 
                   4.09273025e−17 
                 −1.95967055e−15 
               
               
                 C31 
                  −1.6406802e−16 
                 −1.32466527e−15 
                   2.23232144e−16 
               
               
                 C33 
                    4.6161003e−17  
                   1.11389945e−14 
                   1.45669424e−17 
               
               
                 C35 
                   3.46981394e−16 
                 −8.00414961e−14 
                  −5.3737245e−19 
               
               
                 C36 
                   6.56861624e−19 
                   3.51522585e−21 
                 −3.51163866e−17 
               
               
                 C38 
                   2.53098962e−19 
                   5.30473647e−20 
                    8.4177008e−18 
               
               
                 C40 
                 −1.17789383e−18 
                   1.14555302e−17 
                   4.49375372e−19 
               
               
                 C42 
                   7.13915336e−19 
                 −1.10798161e−16 
                 −2.61682976e−20 
               
               
                 C44 
                   6.00248794e−19 
                   6.75342377e−16 
                   2.31069209e−21 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
             
               
               
               
             
           
               
                 TABLE 3c for FIG. 7 
               
               
                   
               
               
                 Coefficient 
                 M2 
                 M1 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 KY 
                 0.00000000 
                 0.00000000 
               
               
                 KX 
                 0.00000000 
                 0.00000000 
               
               
                 RX 
                 −1728.90769600  
                 −880.94474610 
               
               
                 C7 
                   3.08450816e−06 
                 −4.70279039e−08 
               
               
                 C9 
                 −2.17253795e−08 
                   1.08990881e−07 
               
               
                 C10 
                 −3.75473915e−08 
                 −3.45672808e−11 
               
               
                 C12 
                 −1.81552974e−08 
                   2.73887057e−11 
               
               
                 C14 
                   7.96803985e−11 
                 −4.28414412e−10 
               
               
                 C16 
                    2.0647621e−10 
                   2.40236171e−14 
               
               
                 C18 
                   7.22424709e−11 
                 −6.19613419e−13 
               
               
                 C20 
                   1.47510283e−12 
                   1.08423073e−12 
               
               
                 C21 
                   1.77572753e−12 
                 −1.52199951e−17 
               
               
                 C23 
                 −6.59234699e−14 
                  −1.8034018e−15 
               
               
                 C25 
                 −2.26260751e−13 
                 −3.76723043e−15 
               
               
                 C27 
                  −5.706268e−15 
                 −5.40832792e−15 
               
               
                 C29 
                 −2.77294786e−14 
                 −2.49126053e−19 
               
               
                 C31 
                 −4.84971158e−15 
                 −3.60876052e−18 
               
               
                 C33 
                   3.35099874e−16 
                   1.99785264e−18 
               
               
                 C35 
                   2.39450375e−17 
                   8.80558903e−18 
               
               
                 C36 
                   2.21806273e−16 
                 −5.44564635e−22 
               
               
                 C38 
                   1.36037517e−16 
                 −4.37847046e−20 
               
               
                 C40 
                   2.00582463e−17 
                 −7.42210048e−20 
               
               
                 C42 
                   1.83054058e−19 
                 −1.69927808e−19 
               
               
                 C44 
                 −5.75280548e−20 
                   1.02060681e−19 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 4a for FIG. 7 
               
               
                   
               
               
                 Surface 
                 DCX 
                 DCY 
                 DCZ 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 Image plane 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 M8 
                 0.00000000 
                 0.00000000 
                 764.50361369 
               
               
                 M7 
                 0.00000000 
                 96.82652457 
                 64.27191627 
               
               
                 M6 
                 0.00000000 
                 −27.92847503 
                 1058.54662453 
               
               
                 M5 
                 0.00000000 
                 −219.64054559 
                 1392.20908570 
               
               
                 M4 
                 0.00000000 
                 −271.24388131 
                 1813.78075704 
               
               
                 Stop 
                 0.00000000 
                 −198.32156886 
                 1677.53219215 
               
               
                 M3 
                 0.00000000 
                 −128.24179216 
                 1546.81115682 
               
               
                 M2 
                 0.00000000 
                 16.78357234 
                 1430.95006703 
               
               
                 10 
                 0.00000000 
                 8791.56176690 
                 −7122.00998575 
               
               
                 M1 
                 0.00000000 
                 272.34233418 
                 956.66066528 
               
               
                 Object plane 
                 0.00000000 
                 362.68180636 
                 1900.18311637 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
               
             
               
               
               
               
               
             
           
               
                   
                 TABLE 4b for FIG. 7 
               
               
                   
                   
               
               
                   
                 Surface 
                 TLA[deg] 
                 TLB[deg] 
                 TLC[deg] 
               
               
                   
                   
               
             
             
               
                   
               
             
          
           
               
                   
                 Image plane 
                 −0.00000000 
                 0.00000000 
                 −0.00000000 
               
               
                   
                 M8 
                 3.91596926 
                 0.00000000 
                 −0.00000000 
               
               
                   
                 M7 
                 187.39186836 
                 0.00000000 
                 −0.00000000 
               
               
                   
                 M6 
                 −71.50714996 
                 0.00000000 
                 −0.00000000 
               
               
                   
                 M5 
                 108.42016373 
                 0.00000000 
                 −0.00000000 
               
               
                   
                 M4 
                 17.56397197 
                 0.00000000 
                 −0.00000000 
               
               
                   
                 Stop 
                 −36.24096693 
                 0.00000000 
                 −0.00000000 
               
               
                   
                 M3 
                 129.75252018 
                 0.00000000 
                 −0.00000000 
               
               
                   
                 M2 
                 −50.20499466 
                 0.00000000 
                 −0.00000000 
               
               
                   
                 10 
                 135.94318124 
                 0.00000000 
                 −0.00000000 
               
               
                   
                 M1 
                 191.41461048 
                 0.00000000 
                 −0.00000000 
               
               
                   
                 Object plane 
                 −0.00000000 
                 0.00000000 
                 −0.00000000 
               
               
                   
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 5 for FIG. 7 
               
               
                   
               
               
                   
                 Surface 
                 Angle of incidence [deg] 
                 Reflectivity 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                   
                 M8 
                 3.91596926 
                 0.66415239 
               
               
                   
                 M7 
                 0.35585461 
                 0.66566616 
               
               
                   
                 M6 
                 78.62897953 
                 0.85974012 
               
               
                   
                 M5 
                 78.56000002 
                 0.85877563 
               
               
                   
                 M4 
                 10.58806423 
                 0.65325493 
               
               
                   
                 M3 
                 78.41763467 
                 0.85677489 
               
               
                   
                 M2 
                 78.46987638 
                 0.85751067 
               
               
                   
                 M1 
                 16.88179312 
                 0.63082790 
               
               
                   
                 Overall transmission 
                   
                 0.0988 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
             
               
               
               
             
           
               
                 TABLE 6 for FIG. 7 
               
               
                   
               
               
                 X[mm] 
                 Y[mm] 
                 Z[mm] 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 0.00000000 
                 −47.76389383 
                 0.00000000 
               
               
                 0.75722478 
                 −47.21490944 
                 0.00000000 
               
               
                 1.44466231 
                 −45.56440865 
                 0.00000000 
               
               
                 1.99925630 
                 −42.80616853 
                 0.00000000 
               
               
                 2.37083821 
                 −38.94314949 
                 0.00000000 
               
               
                 2.52737588 
                 −34.00299920 
                 0.00000000 
               
               
                 2.45862703 
                 −28.05153657 
                 0.00000000 
               
               
                 2.17710208 
                 −21.19917906 
                 0.00000000 
               
               
                 1.71593988 
                 −13.59913606 
                 0.00000000 
               
               
                 1.12445586 
                 −5.43943918 
                 0.00000000 
               
               
                 0.46249291 
                 3.06794966 
                 0.00000000 
               
               
                 −0.20557575 
                 11.69767212 
                 0.00000000 
               
               
                 −0.81666564 
                 20.21943325 
                 0.00000000 
               
               
                 −1.31433675 
                 28.40487722 
                 0.00000000 
               
               
                 −1.65354402 
                 36.03372730 
                 0.00000000 
               
               
                 −1.80460322 
                 42.89898816 
                 0.00000000 
               
               
                 −1.75605283 
                 48.81111176 
                 0.00000000 
               
               
                 −1.51602869 
                 53.60229092 
                 0.00000000 
               
               
                 −1.11184253 
                 57.13213052 
                 0.00000000 
               
               
                 −0.58761247 
                 59.29431617 
                 0.00000000 
               
               
                 −0.00000000 
                 60.02254886 
                 0.00000000 
               
               
                 0.58761247 
                 59.29431617 
                 0.00000000 
               
               
                 1.11184253 
                 57.13213052 
                 0.00000000 
               
               
                 1.51602869 
                 53.60229092 
                 0.00000000 
               
               
                 1.75605283 
                 48.81111176 
                 0.00000000 
               
               
                 1.80460322 
                 42.89898816 
                 0.00000000 
               
               
                 1.65354402 
                 36.03372730 
                 0.00000000 
               
               
                 1.31433675 
                 28.40487722 
                 0.00000000 
               
               
                 0.81666564 
                 20.21943325 
                 0.00000000 
               
               
                 0.20557575 
                 11.69767212 
                 0.00000000 
               
               
                 −0.46249291 
                 3.06794966 
                 0.00000000 
               
               
                 −1.12445586 
                 −5.43943918 
                 0.00000000 
               
               
                 −1.71593988 
                 −13.59913606 
                 0.00000000 
               
               
                 −2.17710208 
                 −21.19917906 
                 0.00000000 
               
               
                 −2.45862703 
                 −28.05153657 
                 0.00000000 
               
               
                 −2.52737588 
                 −34.00299920 
                 0.00000000 
               
               
                 −2.37083821 
                 −38.94314949 
                 0.00000000 
               
               
                 −1.99925630 
                 −42.80616853 
                 0.00000000 
               
               
                 −1.44466231 
                 −45.56440865 
                 0.00000000 
               
               
                 −0.75722478 
                 −47.21490944 
                 0.00000000 
               
               
                   
               
             
          
         
       
     
         [0205]    An overall reflectivity of the projection optical unit  24  is 9.88%. 
         [0206]    The projection optical unit  24  has a reducing imaging scale of 8×(β=8). 
         [0207]    The image field  8  has an x-extent of two times 6.5 mm and a y-extent of 0.8 mm. The projection optical unit  24  is optimized for an operating wavelength of the illumination light  3  of 13.5 nm. 
         [0208]    In the projection optical unit  24 , a pupil plane  18  is arranged in the beam path of the imaging light  3  between the mirrors M 2  and M 3 . An intermediate image plane  19  is arranged in the imaging beam path between the mirrors M 4  and M 5 . 
         [0209]    The mirrors M 1 , M 3 , M 4 , M 6  and M 8  have negative values for the radius, i.e. are, in principle, concave mirrors. The mirrors M 2 , M 5  and M 7  have positive values for the radius, i.e. are, in principle, convex mirrors. The mirrors M 3 , M 5  and M 6  have very large absolute radii, i.e. only constitute small deviations from plane reflection surfaces. 
         [0210]    It is also the case in the projection optical unit  24  that only the last mirror M 8  includes a passage opening  17  in the imaging beam path for the imaging light  3  guided between the mirrors M 6  and M 7 . 
         [0211]    An installation length of the projection optical unit  24  in the z-direction, i.e. a distance between the object plane  5  and the image plane  9 , is 1900 mm. The mirror M 8  has the largest diameter of all mirrors in the projection optical unit  24 , the diameter lying in the region of 700 mm. 
         [0212]    In the projection optical unit  24 , an object/image offset d OIS  is approximately 360 mm. In the projection optical unit  24 , the object field-side chief rays  16  also include an angle CRAO of 5.5° with a normal of the object plane  5 . 
         [0213]    The projection optical unit  24  has a scanned RMS value of the image field-side wavefront which is in the region of 100 mλ. An image field-side distortion value is in the region of 0.6 nm in the projection optical unit  24 . 
         [0214]    An aperture stop effective for the y-dimension can be arranged in the beam path of the imaging light  3  between the mirrors M 2  and M 3 . 
         [0215]    In the projection optical unit  24 , the chief rays  16  of the imaging light  3  propagate divergently between the object field  4  and the mirror M 1 . 
         [0216]    The mirror M 8  defines an image-side obscuration which in the x-dimension is less than 24% of the image-side numerical aperture of the projection optical unit  24 . 
         [0217]    In the y-direction, the obscuration is significantly smaller and moreover decentered. 
         [0218]    A further embodiment of a projection optical unit  25 , which can be used in the projection exposure apparatus  1  according to  FIG. 1  instead of e.g. the projection optical unit  7 , is explained in the following text on the basis of  FIG. 8 . Components and functions which were already explained above in the context of  FIGS. 1 to 7  are appropriately denoted by the same reference signs and are not discussed again in detail. 
         [0219]    The imaging beam path of the projection optical unit  25  corresponds qualitatively to that of the projection optical units  23  and  24  according to  FIGS. 6 and 7 . The projection optical unit  25  also includes eight mirrors M 1  to M 8 , of which the mirrors M 1 , M 4 , M 7  and M 8  are embodied as mirrors for normal incidence and the mirrors M 2 , M 3 , M 5  and M 6  are embodied as mirrors for grazing incidence. The deflecting effects of the mirrors M 2  and M 3  on the one hand, and M 5  and M 6  on the other hand are subtracted from one another. 
         [0220]    The mirrors M 1  to M 8  are configured as free-form surfaces, for which the free-form surface equation (1), specified above, applies. The optical design data from the projection optical unit  25  can be gathered from the following tables, which, in terms of their design, correspond to the tables for the projection optical unit  7  according to  FIG. 2 . 
         [0000]    
       
         
               
               
               
             
               
               
               
               
             
               
               
               
             
           
               
                 TABLE 1 for FIG. 8 
               
               
                   
               
               
                   
                 Exemplary embodiment 
                 FIG. 8 
               
               
                   
               
             
             
               
                   
                 NA 
                 0.45 
               
             
          
           
               
                   
                 Wavelength 
                 13.5 
                 nm 
               
               
                   
                 Field dimension x 
                 13.0 
                 mm 
               
               
                   
                 Field dimension y 
                 0.784 
                 mm 
               
               
                   
                 Field curvature 
                 0.0 
                 1/mm 
               
             
          
           
               
                   
                 Stop 
                 S9 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
               
               
             
               
               
               
               
               
               
             
           
               
                 TABLE 2 for FIG. 8 
               
               
                   
               
               
                 Surface 
                 Radius x[mm] 
                 Power x[1/mm] 
                 Radius y[mm] 
                 Power y[1/mm] 
                 Operating 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 M8 
                 −1049.60389641 
                 0.00189993 
                 −986.01437231 
                 0.00203430 
                 REFL 
               
               
                 M7 
                 1052.05094258 
                 −0.00190085 
                 516.30074958 
                 −0.00387413 
                 REFL 
               
               
                 M6 
                 672.07102892 
                 −0.00059408 
                 6476.96591445 
                 −0.00154677 
                 REFL 
               
               
                 M5 
                 −799.22989968 
                 0.00049907 
                 −9635.87145309 
                 0.00104073 
                 REFL 
               
               
                 M4 
                 −655.82100664 
                 0.00302260 
                 −1132.34738046 
                 0.00178202 
                 REFL 
               
               
                 M3 
                 2083.13733086 
                 −0.00019163 
                 −8161.78002389 
                 0.00122769 
                 REFL 
               
               
                 M2 
                 — 
                 0.00001224 
                 2513.72027155 
                 −0.00398819 
                 REFL 
               
               
                 M1 
                 −1124.77927352 
                 0.00171284 
                 −993.83277453 
                 0.00208912 
                 REFL 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 3a for FIG. 8 
               
               
                   
               
               
                 Coefficient 
                 M8 
                 M7 
                 M6 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 KY 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 KX 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 RX 
                 −1049.60389600 
                 1052.05094300 
                 672.07102890 
               
               
                 C7 
                   8.94830424e−09 
                   6.82707408e−08 
                   5.39977203e−07 
               
               
                 C9 
                   3.00569958e−09 
                    5.0133583e−08 
                    5.0463779e−08 
               
               
                 C10 
                  −1.0205043e−11 
                   9.13305341e−10 
                   2.96374987e−09 
               
               
                 C12 
                 −1.78212052e−11 
                   2.88849001e−09 
                   3.61953024e−09 
               
               
                 C14 
                 −6.16611869e−12 
                   1.70930306e−09 
                    9.8625888e−11 
               
               
                 C16 
                   5.53369586e−15 
                   6.46391137e−13 
                   1.62428612e−11 
               
               
                 C18 
                   7.14785588e−15 
                   1.61691667e−12 
                   6.55853805e−12 
               
               
                 C20 
                    1.2952174e−15 
                 −1.12568271e−13 
                   9.89173718e−14 
               
               
                 C21 
                 −1.15962082e−17 
                    3.2230907e−15 
                   2.17786681e−14 
               
               
                 C23 
                 −3.29641744e−17 
                   1.94684249e−14 
                   7.78862843e−14 
               
               
                 C25 
                 −2.88253574e−17 
                    2.8363428e−14 
                   2.06500061e−14 
               
               
                 C27 
                 −7.61491275e−18 
                   9.96975622e−15 
                   5.79706038e−17 
               
               
                 C29 
                   3.95947425e−21 
                   4.40316043e−18 
                   1.76578906e−16 
               
               
                 C31 
                     9.59189e−21 
                   3.61186907e−17 
                   1.59804916e−16 
               
               
                 C33 
                    5.9075341e−21 
                   2.40890432e−17 
                   4.63612518e−17 
               
               
                 C35 
                   4.91436138e−22 
                 −2.08227139e−17 
                 −1.15451621e−18 
               
               
                 C36 
                 −9.78221988e−24 
                   2.17340086e−20 
                   4.62607032e−20 
               
               
                 C38 
                 −3.80396711e−23 
                    1.769269e−19 
                   2.36610599e−19 
               
               
                 C40 
                  −5.3008359e−23 
                   5.27416888e−19 
                   3.60474258e−19 
               
               
                 C42 
                 −3.05920471e−23 
                   3.79026666e−19 
                    8.8347498e−20 
               
               
                 C44 
                 −6.20613311e−24 
                 −4.57440157e−20 
                 −2.35018949e−21 
               
               
                 C46 
                   4.59926677e−27 
                 0 
                 0 
               
               
                 C48 
                   1.58065492e−26 
                 0 
                 0 
               
               
                 C50 
                   1.76803708e−26 
                 0 
                 0 
               
               
                 C52 
                   7.68522982e−27 
                 0 
                 0 
               
               
                 C54 
                   5.34537619e−28 
                 0 
                 0 
               
               
                 C55 
                  −1.6671251e−29 
                 0 
                 0 
               
               
                 C57 
                 −8.60661791e−29 
                 0 
                 0 
               
               
                 C59 
                 −1.74742916e−28 
                 0 
                 0 
               
               
                 C61 
                 −1.71631988e−28 
                 0 
                 0 
               
               
                 C63 
                 −7.97461918e−29 
                 0 
                 0 
               
               
                 C65 
                 −1.37837693e−29 
                 0 
                 0 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 3b for FIG. 8 
               
               
                   
               
               
                 Coefficient 
                 M5 
                 M4 
                 M3 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 KY 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 KX 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 RX 
                 −799.22989970 
                 −655.82100660 
                 2083.13733100 
               
               
                 C7 
                 −2.06359045e−07 
                   1.79769856e−06 
                 −1.23888727e−06 
               
               
                 C9 
                   4.53272901e−08 
                   2.37465306e−06 
                   8.86422249e−08 
               
               
                 C10 
                   4.98518606e−10 
                 −1.48557245e−09 
                 −3.40006344e−09 
               
               
                 C12 
                 −1.31134892e−09 
                 −2.80514774e−10 
                   2.03241635e−09 
               
               
                 C14 
                   2.98465492e−12 
                   3.01097166e−09 
                 −3.36768492e−11 
               
               
                 C16 
                   4.49053513e−12 
                   3.15577912e−11 
                 −1.66141091e−11 
               
               
                 C18 
                   1.64207121e−12 
                   7.30259248e−11 
                 −7.13724906e−12 
               
               
                 C20 
                  −1.0335036e−12 
                   3.09731752e−10 
                    5.4031591e−13 
               
               
                 C21 
                 −2.93206259e−14 
                 −2.05672375e−14 
                 −4.18881657e−13 
               
               
                 C23 
                 −5.92456689e−14 
                   2.22350106e−14 
                 −6.83276534e−14 
               
               
                 C25 
                 −5.80080861e−14 
                   1.08931865e−12 
                 −7.07864185e−15 
               
               
                 C27 
                    2.2172926e−14  
                 −1.42234054e−12 
                   5.63121269e−16 
               
               
                 C29 
                   1.40438563e−17 
                   8.53769578e−16 
                 −8.08308771e−16 
               
               
                 C31 
                 −6.66032602e−17 
                   2.70533891e−15 
                   2.67861368e−16 
               
               
                 C33 
                   7.30170261e−16 
                 −1.62676517e−15 
                 −3.42472444e−17 
               
               
                 C35 
                   3.16423462e−16 
                   4.49594522e−14 
                   1.66873362e−18 
               
               
                 C36 
                 −1.81264397e−18 
                 −3.66571047e−19 
                 −6.54742071e−17 
               
               
                 C38 
                 −5.39055928e−20 
                 −3.12546568e−18 
                   4.62927488e−18 
               
               
                 C40 
                 −2.02947052e−18 
                   7.95440303e−17 
                  −4.8710506e−18 
               
               
                 C42 
                 −2.24011839e−18 
                   6.67587526e−16 
                 −2.67955705e−19 
               
               
                 C44 
                 −7.82360967e−18 
                   3.07878704e−16 
                   2.12454918e−22 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
             
               
               
               
             
           
               
                 TABLE 3c for FIG. 8 
               
               
                   
               
               
                 Coefficient 
                 M2 
                 M1 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 KY 
                 0.00000000 
                 0.00000000 
               
               
                 KX 
                 0.00000000 
                 0.00000000 
               
               
                 RX 
                 −32587.82702000 
                 −1124.77927400 
               
               
                 C7 
                 −4.74483513e−07 
                   2.20095584e−09 
               
               
                 C9 
                   3.93556671e−08 
                    1.960322e−07 
               
               
                 C10 
                 −2.66024165e−09 
                 −2.88589459e−11 
               
               
                 C12 
                 −2.10042981e−09 
                 −1.13714912e−11 
               
               
                 C14 
                 −4.96647358e−11 
                 −1.87229835e−10 
               
               
                 C16 
                   3.63968975e−11  
                 −1.00857126e−13 
               
               
                 C18 
                 −6.32882695e−12 
                 −1.48327939e−14 
               
               
                 C20 
                   1.40830966e−12 
                   1.42850505e−12 
               
               
                 C21 
                 −3.43617167e−13 
                 −3.03067897e−17 
               
               
                 C23 
                   2.78640456e−15  
                 −3.68437637e−16 
               
               
                 C25 
                 −2.10521417e−14 
                   2.77481379e−15 
               
               
                 C27 
                 −3.31782506e−16 
                 −2.91734364e−15 
               
               
                 C29 
                   3.53276862e−15 
                   5.08698618e−19 
               
               
                 C31 
                 −7.40107603e−16 
                   7.73915869e−18 
               
               
                 C33 
                   2.47602209e−17 
                 −6.54164067e−19 
               
               
                 C35 
                   3.81467272e−18 
                   1.85860304e−17 
               
               
                 C36 
                 −5.81173248e−18 
                   1.22184892e−21 
               
               
                 C38 
                 −1.24881103e−17 
                   1.12627739e−20 
               
               
                 C40 
                   6.79836244e−18 
                   3.74180742e−20 
               
               
                 C42 
                 −6.71427793e−19 
                   3.54376196e−20 
               
               
                 C44 
                    2.7467903e−20  
                 −9.46214624e−20 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 4a for FIG. 8 
               
               
                   
               
               
                 Surface 
                 DCX 
                 DCY 
                 DCZ 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 Image plane 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 M8 
                 0.00000000 
                 0.00000000 
                 921.48007420 
               
               
                 M7 
                 0.00000000  
                 127.69651360 
                 91.87626879 
               
               
                 M6 
                 0.00000000  
                 −54.51524583 
                 1081.95671536 
               
               
                 M5 
                 0.00000000 
                 20.29114222 
                 1416.57838942 
               
               
                 M4 
                 0.00000000  
                 −58.31889420 
                 1844.49683317 
               
               
                 M3 
                 0.00000000 
                 59.41629968 
                 1599.41318117 
               
               
                 M2 
                 0.00000000  
                 224.00188768 
                 1454.69416858 
               
               
                 Stop 
                 0.00000000  
                 273.52466623 
                 1404.16528501 
               
               
                 M1 
                 0.00000000  
                 493.26104418 
                 894.61377093 
               
               
                 Object plane 
                 0.00000000 
                 589.57009799 
                 1900.28701404 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 4b for FIG. 8 
               
               
                   
               
               
                 Surface 
                 TLA [deg] 
                 TLB [deg] 
                 TLC [deg] 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 Image plane 
                 −0.00000000 
                 0.00000000 
                 −0.00000000 
               
               
                 M8 
                 4.37615932 
                 0.00000000 
                 −0.00000000 
               
               
                 M7 
                 189.59363600 
                 0.00000000 
                 −0.00000000 
               
               
                 M6 
                 88.91365207 
                 0.00000000 
                 −0.00000000 
               
               
                 M5 
                 268.90218087 
                 0.00000000 
                 −0.00000000 
               
               
                 M4 
                 18.03860636 
                 0.00000000 
                 −0.00000000 
               
               
                 M3 
                 127.17947272 
                 0.00000000 
                 −0.00000000 
               
               
                 M2 
                 −52.81127402 
                 0.00000000 
                 −0.00000000 
               
               
                 Stop 
                 206.02771128 
                 0.00000000 
                 −0.00000000 
               
               
                 M1 
                 190.10376344 
                 0.00000000 
                 −0.00000000 
               
               
                 Object plane 
                 −0.00000000 
                 0.00000000 
                 −0.00000000 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 5 for FIG. 8 
               
               
                   
               
               
                   
                 Surface 
                 Angle of incidence [deg] 
                 Reflectivity 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                   
                 M8 
                 4.37615932 
                 0.66374698 
               
               
                   
                 M7 
                 0.83845517 
                 0.66562989 
               
               
                   
                 M6 
                 78.48451336 
                 0.85771648 
               
               
                   
                 M5 
                 78.49604650 
                 0.85787855 
               
               
                   
                 M4 
                 7.63115384 
                 0.65946494 
               
               
                   
                 M3 
                 78.48653632 
                 0.85774492 
               
               
                   
                 M2 
                 78.49242558 
                 0.85782768 
               
               
                   
                 M1 
                 15.57417594 
                 0.63670200 
               
               
                   
                 Overall transmission 
                   
                 0.1004 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
             
               
               
               
             
           
               
                 TABLE 6 for FIG. 8 
               
               
                   
               
               
                 X[mm] 
                 Y[mm] 
                 Z[mm] 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 0.00000000 
                 47.81303970 
                 0.00000000 
               
               
                 −5.44429277 
                 47.46175497 
                 0.00000000 
               
               
                 −10.74517286 
                 46.42220229 
                 0.00000000 
               
               
                 −15.76391160 
                 44.73636357 
                 0.00000000 
               
               
                 −20.37088960 
                 42.47121905 
                 0.00000000 
               
               
                 −24.44946621 
                 39.71451489 
                 0.00000000 
               
               
                 −27.89907302 
                 36.56933710 
                 0.00000000 
               
               
                 −30.63749814 
                 33.14808875 
                 0.00000000 
               
               
                 −32.60243065 
                 29.56653666 
                 0.00000000 
               
               
                 −33.75231387 
                 25.93835392 
                 0.00000000 
               
               
                 −34.06656777 
                 22.37033180 
                 0.00000000 
               
               
                 −33.54529452 
                 18.95837628 
                 0.00000000 
               
               
                 −32.20854890 
                 15.78438787 
                 0.00000000 
               
               
                 −30.09518802 
                 12.91406977 
                 0.00000000 
               
               
                 −27.26136068 
                 10.39574244 
                 0.00000000 
               
               
                 −23.77878796 
                 8.26036180 
                 0.00000000 
               
               
                 −19.73295948 
                 6.52296509 
                 0.00000000 
               
               
                 −15.22125595 
                 5.18562681 
                 0.00000000 
               
               
                 −10.35095305 
                 4.24175823 
                 0.00000000 
               
               
                 −5.23706775 
                 3.68124886 
                 0.00000000 
               
               
                 −0.00000000 
                 3.49551844 
                 0.00000000 
               
               
                 5.23706775 
                 3.68124886 
                 0.00000000 
               
               
                 10.35095305 
                 4.24175823 
                 0.00000000 
               
               
                 15.22125595 
                 5.18562681 
                 0.00000000 
               
               
                 19.73295948 
                 6.52296509 
                 0.00000000 
               
               
                 23.77878796 
                 8.26036180 
                 0.00000000 
               
               
                 27.26136068 
                 10.39574244 
                 0.00000000 
               
               
                 30.09518802 
                 12.91406977 
                 0.00000000 
               
               
                 32.20854890 
                 15.78438787 
                 0.00000000 
               
               
                 33.54529452 
                 18.95837628 
                 0.00000000 
               
               
                 34.06656777 
                 22.37033180 
                 0.00000000 
               
               
                 33.75231387 
                 25.93835392 
                 0.00000000 
               
               
                 32.60243065 
                 29.56653666 
                 0.00000000 
               
               
                 30.63749814 
                 33.14808875 
                 0.00000000 
               
               
                 27.89907302 
                 36.56933710 
                 0.00000000 
               
               
                 24.44946621 
                 39.71451489 
                 0.00000000 
               
               
                 20.37088960 
                 42.47121905 
                 0.00000000 
               
               
                 15.76391160 
                 44.73636357 
                 0.00000000 
               
               
                 10.74517286 
                 46.42220229 
                 0.00000000 
               
               
                 5.44429277 
                 47.46175497 
                 0.00000000 
               
               
                   
               
             
          
         
       
     
         [0221]    An overall reflectivity of the projection optical unit  25  is 10.04%. 
         [0222]    The projection optical unit  25  has a reducing imaging scale of 8×(β=8). 
         [0223]    The image field  8  has an x-extent of two times 6.5 mm and a y-extent of 1 mm. The projection optical unit  25  is optimized for an operating wavelength of the illumination light  3  of 13.5 nm. 
         [0224]    The mirrors M 1 , M 3 , M 4 , M 5  and M 8  have negative values for the radius, i.e. are, in principle, concave mirrors. The mirrors M 2 , M 6  and M 7  have positive values for the radius, i.e. are, in principle, convex mirrors. The mirrors M 3 , M 5  and M 6  have very large absolute radii, i.e. only constitute small deviations from plane reflection surfaces. 
         [0225]    It is also the case in the projection optical unit  25  that only the last mirror M 8  includes a passage opening  17  for the imaging light  3  guided between the mirrors M 6  and M 7 . 
         [0226]    In the projection optical unit  25 , a pupil plane  18  is arranged between the mirror M 2  and the mirror M 3 . In the projection optical unit  25 , an intermediate image plane  19  is arranged in the region of the reflection on the mirror M 5  for grazing incidence. 
         [0227]    In the projection optical unit  25 , a z-distance between the object plane  5  and the image plane  9  is 1900 mm. 
         [0228]    In the projection optical unit  25 , a typical diameter of the largest mirror M 8  is approximately 800 mm. 
         [0229]    In the projection optical unit  25 , an object/image offset d OIS  is approximately 600 mm. In the projection optical unit  25 , the object field-side chief rays  16  also include an angle CRAO of 5.5° with a normal of the object plane  5 . 
         [0230]    The projection optical unit  25  has a scanned RMS value of the image field-side wavefront which is approximately 70 mλ. An image field-side distortion value is approximately 3 nm in the projection optical unit  25 . 
         [0231]    In the projection optical unit  25 , an aperture stop can be arranged in the beam path of the imaging light  3  between the mirrors M 2  and M 3 . 
         [0232]    In the projection optical unit  25 , the chief rays  16  propagate divergently between the object field  4  and the mirror M 1 . 
         [0233]    The mirror M 8  defines an image-side obscuration which in the x-dimension is less than 20% of the image-side numerical aperture of the projection optical unit  25 . In the y-direction, the obscuration is significantly smaller and moreover decentered. 
         [0234]    A further embodiment of a projection optical unit  26 , which can be used in the projection exposure apparatus  1  according to  FIG. 1  instead of e.g. the projection optical unit  7 , is explained in the following text on the basis of  FIG. 9 . Components and functions which were already explained above in the context of  FIGS. 1 to 8  are appropriately denoted by the same reference signs and are not discussed again in detail. 
         [0235]    The projection optical unit  26  has a total of eight mirrors M 1  to M 8 . These are configured as free-form surfaces, for which the free-form surface equation (1), specified above, applies. The imaging beam path of the projection optical unit  26  corresponds qualitatively to that of the projection optical unit  7 , mirrored about a plane parallel to the xz-plane. 
         [0236]    The mirrors M 2  and M 3  on the one hand, and M 5  and M 6  on the other hand once again constitute pairs of mirrors for grazing incidence, the deflecting effect of which for the imaging light adds up. The other mirrors M 1 , M 4 , M 7  and M 8  are mirrors for normal incidence. 
         [0237]    The optical design data from the projection optical unit  26  can be gathered from the following tables, which, in terms of their design, correspond to the tables for the projection optical unit  7  according to  FIG. 2 . 
         [0000]    
       
         
               
               
               
             
               
               
               
               
             
               
               
               
             
           
               
                 TABLE 1 for FIG. 9 
               
               
                   
               
               
                   
                 Exemplary embodiment 
                 FIG. 9 
               
               
                   
               
             
             
               
                   
                 NA 
                 0.45 
               
             
          
           
               
                   
                 Wavelength 
                 13.5 
                 nm 
               
               
                   
                 Field dimension x 
                 13.0 
                 mm 
               
               
                   
                 Field dimension y 
                 0.784 
                 mm 
               
               
                   
                 Field curvature 
                 0.0 
                 1/mm 
               
             
          
           
               
                   
                 Stop 
                 S8 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
               
               
             
               
               
               
               
               
               
             
           
               
                 TABLE 2 for FIG. 9 
               
               
                   
               
               
                 Surface 
                 Radius x[mm] 
                 Power x[1/mm] 
                 Radius y[mm] 
                 Power y[1/mm] 
                 Operating 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 M8 
                 — 
                 0.00195413 
                 −933.33549787 
                 0.00214871 
                 REFL 
               
               
                 M7 
                 1354.53748928 
                 −0.00147651 
                 452.31842933 
                 −0.00442170 
                 REFL 
               
               
                 M6 
                 — 
                 0.00034472 
                 15664.51705589 
                 −0.00052721 
                 REFL 
               
               
                 M5 
                 3999.20552730 
                 −0.00007886 
                 7254.86511412 
                 −0.00174817 
                 REFL 
               
               
                 M4 
                 — 
                 0.00164064 
                 −894.72802928 
                 0.00230144 
                 REFL 
               
               
                 M3 
                 4681.74323636 
                 −0.00007653 
                 5171.50582521 
                 −0.00215877 
                 REFL 
               
               
                 M2 
                  852.69172547 
                 −0.00067816 
                 — 
                 0.00062397 
                 REFL 
               
               
                 M1 
                 — 
                 0.00097408 
                 −2270.56487894 
                 0.00092083 
                 REFL 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 3a for FIG. 9 
               
               
                   
               
               
                 Coefficient 
                 M8 
                 M7 
                 M6 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 KY 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 KX 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 RX 
                 −1020.68473900 
                 1354.53748900 
                 −1405.06283600 
               
               
                 C7 
                 −4.5731683e−10 
                 −3.41690693e−07 
                 −5.65649344e−08 
               
               
                 C9 
                 2.45996777e−09  
                 3.83206678e−08 
                 1.89544462e−09 
               
               
                 C10 
                 −9.85395846e−12 
                 6.44749036e−10 
                 −1.93920244e−10 
               
               
                 C12 
                 −2.34897758e−11 
                 2.85639184e−09 
                 −3.25598414e−11 
               
               
                 C14 
                 −8.72926178e−12 
                 3.07364292e−09 
                 −1.12164645e−13 
               
               
                 C16 
                 6.07361769e−16 
                 −3.09291494e−13  
                 3.36943064e−12 
               
               
                 C18 
                 2.41094328e−15  
                 2.31337277e−13  
                 6.29413154e−13 
               
               
                 C20 
                 1.32110071e−15 
                 1.3381722e−12  
                 1.29643368e−13 
               
               
                 C21 
                 −1.23303721e−17 
                 1.38415935e−15  
                 4.62316004e−14 
               
               
                 C23 
                 −4.20277144e−17 
                 1.20452307e−14  
                 8.27538418e−15 
               
               
                 C25 
                 −4.08488297e−17 
                 3.55373943e−14  
                 8.69367918e−16 
               
               
                 C27 
                 −1.08210387e−17 
                 1.90903669e−14  
                 9.15499041e−18 
               
               
                 C29 
                 1.07931282e−21 
                 −1.26240025e−19 
                 −1.09629551e−16 
               
               
                 C31 
                 3.53989366e−21  
                 7.87268568e−18 
                 −2.60340852e−19 
               
               
                 C33 
                 3.24535646e−21  
                 3.94705236e−17 
                 −1.56739759e−18 
               
               
                 C35 
                 1.50192167e−21 
                 6.62304e−17  
                 −1.72905085e−19 
               
               
                 C36 
                 −1.14892505e−23 
                 6.66100206e−21 
                 1.66079634e−18 
               
               
                 C38 
                 −5.06654961e−23 
                 8.27654198e−20  
                 8.50117627e−20 
               
               
                 C40 
                 −7.8424464e−23  
                 4.19476166e−19 
                 −1.05681234e−19 
               
               
                 C42 
                 −4.9856421e−23  
                 8.00362496e−19  
                 −5.2250027e−21 
               
               
                 C44 
                 −1.06579309e−23 
                 5.55709617e−19  
                 1.40460138e−22 
               
               
                 C46 
                 2.08122398e−27 
                 0 
                 0 
               
               
                 C48 
                 6.60530624e−27 
                 0 
                 0 
               
               
                 C50 
                 7.61977765e−27 
                 0 
                 0 
               
               
                 C52 
                 4.50302264e−27 
                 0 
                 0 
               
               
                 C54 
                 1.39426672e−27 
                 0 
                 0 
               
               
                 C55 
                 −2.0882185e−29 
                 0 
                 0 
               
               
                 C57 
                 −1.18627262e−28 
                 0 
                 0 
               
               
                 C59  
                 −2.58588211e−28 
                 0 
                 0 
               
               
                 C61  
                 −2.72003773e−28 
                 0 
                 0 
               
               
                 C63 
                 −1.3620868e−28 
                 0 
                 0 
               
               
                 C65  
                 −2.53756018e−29 
                 0 
                 0 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 3b for FIG. 9 
               
               
                   
               
               
                 Coefficient 
                 M5 
                 M4 
                 M3 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 KY 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 KX 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 RX 
                 3999.20552700 
                 −1184.01227800 
                 4681.74323600 
               
               
                 C7 
                 8.69357878e−08  
                 7.62650744e−09  
                 1.82926331e−07 
               
               
                 C9 
                 −2.20256023e−08 
                 −6.79819355e−07 
                 −2.74549952e−08 
               
               
                 C10 
                 6.23391082e−10 
                 −6.30875708e−11 
                 1.36557421e−10 
               
               
                 C12 
                 2.15155751e−10 
                 6.40787678e−12  
                 5.55467106e−10 
               
               
                 C14 
                 6.51961859e−11 
                 −3.52233076e−09  
                 1.76746757e−10 
               
               
                 C16 
                 8.39711467e−13 
                 −2.68662388e−14  
                 1.76890882e−12 
               
               
                 C18 
                 2.30182337e−13 
                 −1.32962452e−12 
                 −4.71589056e−13 
               
               
                 C20 
                 −4.46761962e−14 
                 −2.08675862e−11 
                 1.39910872e−13 
               
               
                 C21 
                 −4.34103393e−15 
                 −6.57999966e−17 
                 −1.21518032e−14 
               
               
                 C23 
                 3.68657946e−15 
                 −8.04594597e−16  
                 9.50534732e−15 
               
               
                 C25 
                 1.89166259e−16 
                 −3.29911674e−15 
                 −8.40961008e−15 
               
               
                 C27 
                 1.06520031e−16 
                 −1.32487137e−13 
                 −8.07445146e−15 
               
               
                 C29 
                 1.3373458e−17  
                 9.49001529e−19 
                 6.03691731e−18 
               
               
                 C31 
                 1.69029919e−17 
                 −8.32008838e−18  
                 9.40385193e−17 
               
               
                 C33 
                 2.62169884e−18  
                 8.1099079e−17 
                 1.1838444e−16 
               
               
                 C35 
                 −3.09635883e−19 
                 −1.03894539e−15  
                 9.19224029e−17 
               
               
                 C36 
                 3.39460047e−19 
                 −9.69222081e−22  
                 1.64007551e−19 
               
               
                 C38 
                 1.19302799e−19  
                 1.76179484e−21  
                 6.27204932e−20 
               
               
                 C40 
                 6.54223006e−20  
                 1.83258474e−20 
                 −4.59136703e−19 
               
               
                 C42 
                 −4.52075866e−21  
                 1.01522211e−18 
                 −4.92528089e−19 
               
               
                 C44 
                 7.14188701e−22 
                 −5.99497164e−18 
                 −3.46025607e−19 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
             
               
               
               
             
           
               
                 TABLE 3c for FIG. 9 
               
               
                   
               
               
                 Coefficient 
                 M2 
                 M1 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 KY 
                 0.00000000 
                 0.00000000 
               
               
                 KX 
                 0.00000000 
                 0.00000000 
               
               
                 RX 
                 852.69172550 
                 −1964.03237500 
               
               
                 C7 
                 −7.81658255e−07 
                 −4.55147095e−09 
               
               
                 C9 
                 1.56377907e−09 
                 −5.53517249e−08 
               
               
                 C10 
                 5.58543355e−10 
                 −6.87418275e−12 
               
               
                 C12 
                 1.03807562e−09  
                 −1.8936292e−11 
               
               
                 C14 
                 −7.16700901e−13  
                 2.34208295e−10 
               
               
                 C16 
                 −2.34728814e−12  
                 2.34056772e−14 
               
               
                 C18 
                 −1.28373035e−12 
                 1.87499703e−13 
               
               
                 C20 
                 −7.57748125e−15  
                 −8.87948384e−13 
               
               
                 C21 
                 −1.15979439e−15  
                 1.42512308e−18 
               
               
                 C23 
                 4.32890616e−15 
                 2.07491865e−17 
               
               
                 C25 
                 1.60432619e−15 
                 −9.62467925e−16 
               
               
                 C27 
                 2.85253744e−18 
                 2.00812e−15 
               
               
                 C29 
                 3.98866926e−18 
                 1.34308944e−20 
               
               
                 C31 
                 −4.89809284e−18  
                 −1.00614084e−19 
               
               
                 C33 
                 −1.71062114e−18  
                 4.24046777e−18 
               
               
                 C35 
                 7.20763643e−21 
                 −2.92886467e−18 
               
               
                 C36 
                 6.42255749e−21 
                 −3.18411183e−24 
               
               
                 C38 
                 −3.70862193e−21  
                 −1.94058082e−23 
               
               
                 C40 
                 3.05690863e−21 
                 9.71214773e−22 
               
               
                 C42 
                 1.05972674e−21 
                 −7.95009632e−21 
               
               
                 C44 
                 −1.21554754e−23  
                 6.09195055e−21 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 4a for FIG. 9 
               
               
                   
               
               
                 Surface 
                 DCX 
                 DCY 
                 DCZ 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 Image plane 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 M8 
                 0.00000000 
                 0.00000000 
                 865.29422222 
               
               
                 M7 
                 0.00000000 
                 118.52490924 
                 68.26504872 
               
               
                 M6 
                 0.00000000 
                 −36.78487779 
                 1055.95508411 
               
               
                 M5 
                 0.00000000 
                 −363.53035676 
                 1490.07075809 
               
               
                 M4 
                 0.00000000 
                 −730.26441301 
                 1745.75557040 
               
               
                 M3 
                 0.00000000 
                 −69.28979005 
                 1660.49873728 
               
               
                 Stop 
                 0.00000000 
                 343.22961949 
                 1432.58044567 
               
               
                 M2 
                 0.00000000 
                 752.01678132 
                 1223.96788517 
               
               
                 M1 
                 0.00000000 
                 1204.58566704 
                 386.83503296 
               
               
                 Object plane 
                 0.00000000 
                 1351.26144344 
                 1909.74496129 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 4b for FIG. 9 
               
               
                   
               
               
                 Surface 
                 TLA [deg] 
                 TLB [deg] 
                 TLC [deg] 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 Image plane 
                 −0.00000000 
                 0.00000000 
                 −0.00000000 
               
               
                 M8 
                 4.22991607  
                 0.00000000 
                 −0.00000000 
               
               
                 M7 
                 188.70125998 
                 0.00000000 
                 −0.00000000 
               
               
                 M6 
                 −67.04744721 
                 0.00000000 
                 −0.00000000 
               
               
                 M5 
                 −43.95927660 
                 0.00000000 
                 −0.00000000 
               
               
                 M4 
                 68.88242468 
                 0.00000000 
                 −0.00000000 
               
               
                 M3 
                 −17.67119969 
                 0.00000000 
                 −0.00000000 
               
               
                 Stop 
                 −59.23477257 
                 0.00000000 
                 −0.00000000 
               
               
                 M2 
                 −44.79701653 
                 0.00000000 
                 −0.00000000 
               
               
                 M1 
                 191.44774020 
                 0.00000000 
                 −0.00000000 
               
               
                 Object plane 
                 −0.00000000 
                 0.00000000 
                 −0.00000000 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 5 for FIG. 9 
               
               
                   
               
               
                   
                 Surface 
                 Angle of incidence [deg] 
                 Reflectivity 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                   
                 M8 
                 4.22991607 
                 0.66388105 
               
               
                   
                 M7 
                 0.23883275 
                 0.66566686 
               
               
                   
                 M6 
                 75.98494377 
                 0.82019012 
               
               
                   
                 M5 
                 80.92687210 
                 0.89027623 
               
               
                   
                 M4 
                 13.76746994 
                 0.64369696 
               
               
                   
                 M3 
                 79.67997395 
                 0.87406508 
               
               
                   
                 M2 
                 73.19415034 
                 0.77128309 
               
               
                   
                 M1 
                 16.94892910 
                 0.63050655 
               
               
                   
                 Overall transmission 
                   
                 0.0883 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
             
               
               
               
             
           
               
                 TABLE 6 for FIG. 9 
               
               
                   
               
               
                 X[mm] 
                 Y[mm] 
                 Z[mm] 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 0.00000000 
                 −80.47093417 
                 0.00000000 
               
               
                 −10.25746907 
                 −79.94987076 
                 0.00000000 
               
               
                 −20.26826613 
                 −78.37210765 
                 0.00000000 
               
               
                 −29.79066890 
                 −75.69797214 
                 0.00000000 
               
               
                 −38.59312691 
                 −71.87406347 
                 0.00000000 
               
               
                 −46.45979046 
                 −66.85028467 
                 0.00000000 
               
               
                 −53.19615576 
                 −60.60006602 
                 0.00000000 
               
               
                 −58.63447748 
                 −53.13981514 
                 −0.00000000 
               
               
                 −62.63850784 
                 −44.54314891 
                 0.00000000 
               
               
                 −65.10719435 
                 −34.94724292 
                 0.00000000 
               
               
                 −65.97718636 
                 −24.55138803 
                 0.00000000 
               
               
                 −65.22420672 
                 −13.60979294 
                 0.00000000 
               
               
                 −62.86345402 
                 −2.42134193 
                 0.00000000 
               
               
                 −58.94921668 
                 8.68142822 
                 0.00000000 
               
               
                 −53.57381986 
                 19.34327530 
                 0.00000000 
               
               
                 −46.86592081 
                 29.19797884 
                 0.00000000 
               
               
                 −38.98806545 
                 37.88260901 
                 0.00000000 
               
               
                 −30.13336574 
                 45.05554784 
                 −0.00000000 
               
               
                 −20.52118204 
                 50.41779081 
                 −0.00000000 
               
               
                 −10.39177552 
                 53.73519155 
                 0.00000000 
               
               
                 −0.00000000 
                 54.85815175 
                 0.00000000 
               
               
                 10.39177552 
                 53.73519155 
                 −0.00000000 
               
               
                 20.52118204 
                 50.41779081 
                 0.00000000 
               
               
                 30.13336574 
                 45.05554784 
                 −0.00000000 
               
               
                 38.98806545 
                 37.88260901 
                 0.00000000 
               
               
                 46.86592081 
                 29.19797884 
                 0.00000000 
               
               
                 53.57381986 
                 19.34327530 
                 0.00000000 
               
               
                 58.94921668 
                 8.68142822 
                 0.00000000 
               
               
                 62.86345402 
                 −2.42134193 
                 0.00000000 
               
               
                 65.22420672 
                 −13.60979294 
                 0.00000000 
               
               
                 65.97718636 
                 −24.55138803 
                 0.00000000 
               
               
                 65.10719435 
                 −34.94724292 
                 0.00000000 
               
               
                 62.63850784 
                 −44.54314891 
                 0.00000000 
               
               
                 58.63447748 
                 −53.13981514 
                 −0.00000000 
               
               
                 53.19615576 
                 −60.60006602 
                 0.00000000 
               
               
                 46.45979046 
                 −66.85028467 
                 0.00000000 
               
               
                 38.59312691 
                 −71.87406347 
                 0.00000000 
               
               
                 29.79066890 
                 −75.69797214 
                 0.00000000 
               
               
                 20.26826613 
                 −78.37210765 
                 −0.00000000 
               
               
                 10.25746907 
                 −79.94987076 
                 0.00000000 
               
               
                   
               
             
          
         
       
     
         [0238]    An overall reflectivity of the projection optical unit  26  is 8.83%. 
         [0239]    The projection optical unit  26  has a reducing imaging scale of 8×(β=8). 
         [0240]    The image field  8  has an x-extent of two times 6.5 mm and a y-extent of 1 mm. The projection optical unit  26  is optimized for an operating wavelength of the illumination light  3  of 13.5 nm. 
         [0241]    The mirrors M 1 , M 2 , M 4  and M 8  have negative values for the radius, i.e. are, in principle, concave mirrors. The mirrors M 3 , M 5 , M 6  and M 7  have positive values for the radius, i.e. are, in principle, convex mirrors. The mirrors M 2 , M 3 , M 5  and M 6  have very large absolute radii, i.e. only constitute small deviations from plane reflection surfaces. 
         [0242]    A pupil plane  18  of the projection optical unit  26  lies in the beam path between the mirrors M 2  and M 3 . Unlike what is schematically indicated in  FIG. 9 , this stop plane is tilted in relation to a chief ray of the central field point. An intermediate image plane  19  of the projection optical unit  26  lies in the region of a reflection on the mirror M 3 . 
         [0243]    It is also the case in the projection optical unit  26  that the mirror M 8  is the only mirror including a passage opening  17  in the imaging beam path for the imaging light  3  between the mirrors M 6  and M 7 . 
         [0244]    In the projection optical unit  26 , a z-distance between the object plane  5  and the image plane  9  is 1900 mm. 
         [0245]    In the projection optical unit  26 , a typical diameter of the largest mirror M 8  is approximately 800 mm. 
         [0246]    In the projection optical unit  26 , an object/image offset d OIS  is approximately 1350 mm. In the projection optical unit  26 , the object field-side chief rays  16  also include an angle CRAO of 5.5° with a normal of the object plane  5 . 
         [0247]    The projection optical unit  26  has a scanned RMS value of the image field-side wavefront which is approximately 30 mλ. An image field-side distortion value is approximately 1.0 nm in the projection optical unit  26 . 
         [0248]    In the projection optical unit  26 , a stop effective for the x-direction can be arranged in the beam path of the imaging light  3  between the mirrors M 1  and M 2  and a stop effective for the y-dimension can be arranged in the beam path between the mirrors M 2  and M 3 . 
         [0249]    In the projection optical unit  26 , the chief rays  16  propagate divergently in the beam path of the imaging light  3  between the object field  4  and the mirror M 1 . 
         [0250]    The mirror M 8  defines an image-side obscuration which in the x-dimension is less than 20% of the image-side numerical aperture of the projection optical unit  26 . In the y-direction, the obscuration is significantly smaller and moreover decentered. 
         [0251]    A further embodiment of a projection optical unit  27 , which can be used in the projection exposure apparatus  1  according to  FIG. 1  instead of e.g. the projection optical unit  7 , is explained in the following text on the basis of  FIG. 10 . Components and functions which were already explained above in the context of  FIGS. 1 to 9  are appropriately denoted by the same reference signs and are not discussed again in detail. 
         [0252]    The projection optical unit  27  has a total of nine mirrors M 1  to M 9 . The mirrors M 1 , M 3 , M 5 , M 6  and M 7  are embodied as mirrors for grazing incidence. The mirrors M 2 , M 4 , M 8  and M 9  are embodied as mirrors for normal incidence. After the reflection on the mirror M 1 , the imaging beam path of the projection optical unit  27  corresponds qualitatively to that of the projection optical unit  26  before the reflection on the mirror M 1  located there. 
         [0253]    Unlike in the projection optical unit  26 , the object plane  5  and the image plane  9  in the projection optical unit  27  do not extend parallel to one another, but rather have an angle with respect to one another. The angle between the object plane  5  and the image plane  9  is approximately 25°. A different angle between object plane  5  and the image plane  9  is also possible, for example an angle of 9°. 
         [0254]    The mirrors M 1  to M 9  are embodied as free-form surfaces, for which the free-form surface equation (1), specified above, applies. The optical design data from the projection optical unit  27  can be gathered from the following tables, which, in terms of their design, correspond to the tables in relation to the projection optical unit  7  according to  FIG. 2 . 
         [0000]    
       
         
               
               
               
             
               
               
               
               
             
               
               
               
             
           
               
                 TABLE 1 for FIG. 10 
               
               
                   
               
               
                   
                 Exemplary embodiment 
                 FIG. 10 
               
               
                   
               
             
             
               
                   
                 NA 
                 0.45 
               
             
          
           
               
                   
                 Wavelength 
                 13.5 
                 nm 
               
               
                   
                 Field dimension x 
                 13.0 
                 mm 
               
               
                   
                 Field dimension y 
                 0.784 
                 mm 
               
               
                   
                 Field curvature 
                 0.0 
                 1/mm 
               
             
          
           
               
                   
                 Stop 
                 S8 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
               
               
             
               
               
               
               
               
               
             
           
               
                 TABLE 2 for FIG. 10 
               
               
                   
               
               
                 Surface 
                 Radius x[mm] 
                 Power x[1/mm] 
                 Radius y[mm] 
                 Power y[1/mm] 
                 Operating 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 M9 
                 −927.06163241 
                 0.00215195 
                 −844.37553102 
                 0.00237456 
                 REFL 
               
               
                 M8 
                 1260.16184110 
                 −0.00158703 
                 401.08562452 
                 −0.00498668 
                 REFL 
               
               
                 M7 
                 −1168.04413588 
                 0.00040107 
                 11410.61912595 
                 −0.00074830 
                 REFL 
               
               
                 M6 
                 4599.68965912 
                 −0.00006782 
                 8916.30231166 
                 −0.00143804 
                 REFL 
               
               
                 M5 
                 −1096.76971549 
                 0.00176717 
                 −863.86589235 
                 0.00238902 
                 REFL 
               
               
                 M4 
                 4376.93959430 
                 −0.00008826 
                 4854.36195700 
                 −0.00213313 
                 REFL 
               
               
                 M3 
                 694.47986096 
                 −0.00078202 
                 −11204.91072986 
                 0.00065732 
                 REFL 
               
               
                 M2 
                 −1794.72340819 
                 0.00106428 
                 −2029.30630895 
                 0.00103195 
                 REFL 
               
               
                 M1 
                 56094.16071744 
                 −0.00000619 
                 2455768.87767400 
                 −0.00000469 
                 REFL 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 3a for FIG. 10 
               
               
                   
               
               
                 Coefficient 
                 M9 
                 M8 
                 M7 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 KY 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 KX 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 RX 
                 −927.06163240 
                 1260.16184100 
                 −1168.04413600 
               
               
                 C7 
                 −2.23517614e−09 
                 −4.50960587e−07 
                 −6.09122113e−08 
               
               
                 C9 
                 3.6145057e−09 
                 2.20913057e−07  
                 −7.41514642e−09 
               
               
                 C10 
                 −1.30846827e−11 
                 8.26856896e−10 
                 −4.23871389e−10 
               
               
                 C12 
                 −3.31679633e−11 
                 3.96892634e−09  
                 −8.1925409e−11 
               
               
                 C14 
                 −1.11333628e−11 
                 3.96037785e−09  
                 5.90888948e−12 
               
               
                 C16 
                 −1.35234341e−15 
                 −7.57597915e−13 
                 3.35805375e−12 
               
               
                 C18 
                 2.4979396e−15 
                 7.50962025e−13  
                 5.21136649e−13 
               
               
                 C20 
                 2.05872696e−15  
                 1.71669679e−12  
                 1.05276252e−13 
               
               
                 C21 
                 −1.94087173e−17  
                 1.87848046e−15  
                 8.25497656e−14 
               
               
                 C23 
                 −7.12735855e−17  
                 2.02345088e−14  
                 1.69291777e−14 
               
               
                 C25 
                 −6.73063611e−17  
                 5.75563235e−14  
                 1.53606778e−15 
               
               
                 C27 
                 −1.82798337e−17  
                 5.09562952e−14  
                 3.54149717e−17 
               
               
                 C29 
                 −3.20697386e−24 
                 −7.22215501e−19 
                 −3.97944158e−16 
               
               
                 C31 
                 3.5532586e−21 
                 2.1496672e−17 
                 −2.2247379e−17 
               
               
                 C33 
                 5.38887498e−21  
                 6.98750447e−17 
                 1.44225902e−18 
               
               
                 C35 
                 2.90441791e−21  
                 1.60217048e−16  
                 2.10047652e−19 
               
               
                 C36 
                 −2.16831662e−23  
                 1.02346305e−20  
                 7.76582807e−18 
               
               
                 C38 
                 −1.024839e−22 
                 1.50853153e−19  
                 2.1988537e−18 
               
               
                 C40 
                 −1.5739648e−22  
                 7.95625269e−19 
                 8.70609334e−20 
               
               
                 C42 
                 −9.99598149e−23 
                 1.67352786e−18 
                 3.47122436e−22 
               
               
                 C44 
                 −2.1418847e−23  
                 1.35065244e−18  
                 −3.9650949e−23 
               
               
                 C46 
                 1.75635066e−27 
                 0 
                 0 
               
               
                 C48 
                 3.95925628e−27 
                 0 
                 0 
               
               
                 C50 
                 9.08959768e−27 
                 0 
                 0 
               
               
                 C52 
                 7.51947576e−27 
                 0 
                 0 
               
               
                 C54 
                 2.95311155e−27 
                 0 
                 0 
               
               
                 C55 
                 −4.9313257e−29 
                 0 
                 0 
               
               
                 C57 
                 −2.91657271e−28 
                 0 
                 0 
               
               
                 C59 
                 −6.40825581e−28 
                 0 
                 0 
               
               
                 C61 
                 −6.7271506e−28 
                 0 
                 0 
               
               
                 C63 
                 −3.36939719e−28 
                 0 
                 0 
               
               
                 C65 
                 −6.32994338e−29 
                 0 
                 0 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 3b for FIG. 10 
               
               
                   
               
               
                 Coefficient 
                 M6 
                 M5 
                 M4 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 KY 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 KX 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 RX 
                 4599.68965900 
                 −1096.76971500 
                 4376.93959400 
               
               
                 C7 
                 1.03365575e−07 
                 1.77442565e−08 
                 2.85338602e−07 
               
               
                 C9 
                 −1.54020378e−08 
                 −6.87485517e−07 
                 −1.50086102e−08 
               
               
                 C10 
                 6.24726933e−10 
                 −6.07852311e−11 
                 −2.45993749e−10 
               
               
                 C12 
                 2.40839743e−10  
                 5.8774529e−11  
                 7.01376961e−10 
               
               
                 C14 
                 5.40400123e−11  
                 −4.141262e−09  
                 2.22502751e−10 
               
               
                 C16 
                 8.59548973e−13  
                 6.15732667e−14 
                 3.90716877e−12 
               
               
                 C18 
                 3.88970513e−13 
                 −1.96817792e−12 
                 −8.40526435e−13 
               
               
                 C20 
                 −4.05623477e−14 
                 −2.89315132e−11 
                 4.02410751e−13 
               
               
                 C21 
                 −1.20558697e−14  
                 2.96793339e−17 
                 −3.71431043e−14 
               
               
                 C23 
                 3.60545789e−15 
                 −1.07466885e−15 
                 2.86503345e−14 
               
               
                 C25 
                 4.90623123e−16 
                 −7.66590675e−15 
                 −1.34184278e−14 
               
               
                 C27 
                 1.09460213e−16 
                 −2.25511385e−13 
                 −1.60120001e−14 
               
               
                 C29 
                 −4.29010487e−19 
                 2.6566245e−18  
                 −1.11931312e−16 
               
               
                 C31 
                 2.82057928e−17 
                 −4.89526911e−18 
                 1.96219169e−16 
               
               
                 C33 
                 3.64606722e−18  
                 1.17410302e−16 
                 1.62404628e−16 
               
               
                 C35 
                 −1.9616745e−19 
                 −1.76366177e−15 
                 2.00776571e−16 
               
               
                 C36 
                 4.55297641e−19 
                 −1.10261165e−21 
                 2.17082945e−21 
               
               
                 C38 
                 1.72685649e−19 
                 4.71570588e−21 
                 −1.71177213e−19 
               
               
                 C40 
                 1.19053297e−19 
                 1.68707682e−19 
                 −5.48323926e−19 
               
               
                 C42 
                 2.84505286e−21 
                 1.74228055e−18 
                 −7.77652616e−19 
               
               
                 C44 
                 3.95736521e−22 
                 −8.4090687e−18 
                 −8.35475752e−19 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 3c for FIG. 10 
               
               
                   
               
               
                 Coefficient 
                 M3 
                 M2 
                 M1 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 KY 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 KX 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 RX 
                 694.47986100 
                 −1794.72340800 
                 56094.16072000 
               
               
                 C7 
                 −9.05001362e−07 
                 2.43898758e−08 
                 −4.50372077e−08 
               
               
                 C9 
                 3.15550349e−09 
                 −3.56700561e−08 
                 −1.70664296e−09 
               
               
                 C10 
                 6.34026502e−10 
                 9.89791173e−13 
                 −4.70024759e−11 
               
               
                 C12 
                 1.18596959e−09 
                 −6.80752791e−11  
                 −1.3238749e−11 
               
               
                 C14 
                 1.06817193e−12  
                 2.4496293e−10 
                 5.60439886e−14 
               
               
                 C16 
                 −3.63455516e−12 
                 −5.25512666e−15  
                 1.47433739e−13 
               
               
                 C18 
                 −1.41249895e−12 
                 4.60707008e−13 
                 2.95667054e−14 
               
               
                 C20 
                 −1.74617944e−14 
                 −1.2047971e−12 
                 4.8002619e−15 
               
               
                 C21 
                 −1.91218475e−15 
                 −2.29258544e−18 
                 1.9028315e−16 
               
               
                 C23 
                 7.60619654e−15  
                 1.4721488e−16 
                 3.97100834e−16 
               
               
                 C25 
                 1.76329071e−15 
                 −2.52607323e−15  
                 5.02793845e−17 
               
               
                 C27 
                 1.20304383e−17 
                 2.91792964e−15 
                 1.19507083e−17 
               
               
                 C29 
                 6.27376885e−18  
                 6.5563985e−20 
                 7.22310933e−20 
               
               
                 C31 
                 −9.91733853e−18 
                 −8.95631485e−19  
                 3.50704599e−19 
               
               
                 C33 
                 −2.07433776e−18 
                 8.24988356e−18 
                 6.30478322e−20 
               
               
                 C35 
                 8.04274126e−21 
                 −6.16363923e−18  
                 1.42780131e−20 
               
               
                 C36 
                 1.68635395e−20 
                 −3.79475169e−23  
                 1.84200486e−21 
               
               
                 C38 
                 −2.47873133e−21 
                 −5.38421564e−22 
                 −8.43097684e−22 
               
               
                 C40 
                 7.02632851e−21 
                 1.78624244e−21 
                 1.73741471e−22 
               
               
                 C42 
                 1.58722416e−21 
                 −1.78993463e−20  
                 3.02938088e−23 
               
               
                 C44 
                 −3.21703854e−23 
                 5.70718198e−21 
                 7.7900247e−24 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 4a for FIG. 10 
               
               
                   
               
               
                 Surface 
                 DCX 
                 DCY 
                 DCZ 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 Image plane 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 M9 
                 0.00000000 
                 0.00000000 
                 786.63111111 
               
               
                 M8 
                 0.00000000 
                 102.63834162 
                 66.28304947 
               
               
                 M7 
                 0.00000000 
                 −42.20392704 
                 963.45589840 
               
               
                 M6 
                 0.00000000 
                 −330.28870287 
                 1356.10968115 
               
               
                 M5 
                 0.00000000 
                 −662.92650671 
                 1595.87409890 
               
               
                 M4 
                 0.00000000 
                 −55.87386363 
                 1518.97310352 
               
               
                 Stop 
                 0.00000000 
                 312.02692681 
                 1302.34585970 
               
               
                 M3 
                 0.00000000 
                 677.24956983 
                 1104.30311012 
               
               
                 M2 
                 0.00000000 
                 1096.20099718 
                 348.22303178 
               
               
                 M1 
                 0.00000000 
                 1163.41792826 
                 1046.10952756 
               
               
                 Object plane 
                 −0.00000000 
                 990.09733323 
                 1716.14318698 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 4b for FIG. 10 
               
               
                   
               
               
                 Surface 
                 TLA [deg] 
                 TLB [deg] 
                 TLC [deg] 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 Image plane 
                 −0.00000000 
                 0.00000000 
                 −0.00000000 
               
               
                 M9 
                 4.05665761 
                 0.00000000 
                 −0.00000000 
               
               
                 M8 
                 188.65127645 
                 0.00000000 
                 −0.00000000 
               
               
                 M7 
                 −67.27942550 
                 0.00000000 
                 −0.00000000 
               
               
                 M6 
                 −44.75934404 
                 0.00000000 
                 −0.00000000 
               
               
                 M5 
                 68.49763755 
                 0.00000000 
                 −0.00000000 
               
               
                 M4 
                 −18.35688966 
                 0.00000000 
                 −0.00000000 
               
               
                 Stop 
                 −59.23477257 
                 0.00000000 
                 −0.00000000 
               
               
                 M3 
                 −45.24965445 
                 0.00000000 
                 −0.00000000 
               
               
                 M2 
                 191.74671318 
                 0.00000000 
                 −0.00000000 
               
               
                 M1 
                 −85.49756738 
                 −0.00000000 
                 180.00000000 
               
               
                 Object plane 
                 9.00279525 
                 −0.00000000 
                 180.00000000 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 5 for FIG. 10 
               
               
                   
               
               
                   
                 Surface 
                 Angle of incidence [deg] 
                 Reflectivity 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                   
                 M9 
                 4.05665761 
                 0.66403357 
               
               
                   
                 M8 
                 0.53044148 
                 0.66565924 
               
               
                   
                 M7 
                 76.45362613 
                 0.82762443 
               
               
                   
                 M6 
                 81.02626853 
                 0.89153746 
               
               
                   
                 M5 
                 14.28246533 
                 0.64182800 
               
               
                   
                 M4 
                 78.86369490 
                 0.86299856 
               
               
                   
                 M3 
                 74.24363169 
                 0.79067680 
               
               
                   
                 M2 
                 17.24608899 
                 0.62906014 
               
               
                   
                 M1 
                 79.99938209 
                 0.87829176 
               
               
                   
                 Overall transmission 
                   
                 0.0789 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
             
               
               
               
             
           
               
                 TABLE 6 for FIG. 10 
               
               
                   
               
               
                 X[mm] 
                 Y[mm] 
                 Z[mm] 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 0.00000000 
                 −77.36899626 
                 0.00000000 
               
               
                 −9.63805104 
                 −76.89174932 
                 0.00000000 
               
               
                 −19.04585126 
                 −75.44603498 
                 0.00000000 
               
               
                 −27.99720457 
                 −72.99379120 
                 0.00000000 
               
               
                 −36.27449492 
                 −69.48369854 
                 0.00000000 
               
               
                 −43.67382900 
                 −64.86713406 
                 0.00000000 
               
               
                 −50.01062298 
                 −59.11655450 
                 0.00000000 
               
               
                 −55.12523420 
                 −52.24278088 
                 0.00000000 
               
               
                 −58.88805408 
                 −44.30771100 
                 0.00000000 
               
               
                 −61.20346679 
                 −35.43047265 
                 0.00000000 
               
               
                 −62.01235694 
                 −25.78715767 
                 0.00000000 
               
               
                 −61.29323966 
                 −15.60585844 
                 0.00000000 
               
               
                 −59.06229034 
                 −5.15917759 
                 0.00000000 
               
               
                 −55.37254326 
                 5.24425982 
                 0.00000000 
               
               
                 −50.31248449 
                 15.26910313 
                 0.00000000 
               
               
                 −44.00419258 
                 24.56450552 
                 0.00000000 
               
               
                 −36.60098665 
                 32.77884030 
                 0.00000000 
               
               
                 −28.28434784 
                 39.57860245 
                 0.00000000 
               
               
                 −19.25989969 
                 44.67051183 
                 0.00000000 
               
               
                 −9.75241853 
                 47.82425257 
                 0.00000000 
               
               
                 −0.00000000 
                 48.89242200 
                 0.00000000 
               
               
                 9.75241853 
                 47.82425257 
                 0.00000000 
               
               
                 19.25989969 
                 44.67051183 
                 0.00000000 
               
               
                 28.28434784 
                 39.57860245 
                 0.00000000 
               
               
                 36.60098665 
                 32.77884030 
                 0.00000000 
               
               
                 44.00419258 
                 24.56450552 
                 0.00000000 
               
               
                 50.31248449 
                 15.26910313 
                 0.00000000 
               
               
                 55.37254326 
                 5.24425982 
                 0.00000000 
               
               
                 59.06229034 
                 −5.15917759 
                 0.00000000 
               
               
                 61.29323966 
                 −15.60585844 
                 0.00000000 
               
               
                 62.01235694 
                 −25.78715767 
                 0.00000000 
               
               
                 61.20346679 
                 −35.43047265 
                 0.00000000 
               
               
                 58.88805408 
                 −44.30771100 
                 0.00000000 
               
               
                 55.12523420 
                 −52.24278088 
                 0.00000000 
               
               
                 50.01062298 
                 −59.11655450 
                 0.00000000 
               
               
                 43.67382900 
                 −64.86713406 
                 0.00000000 
               
               
                 36.27449492 
                 −69.48369854 
                 0.00000000 
               
               
                 27.99720457 
                 −72.99379120 
                 0.00000000 
               
               
                 19.04585126 
                 −75.44603498 
                 0.00000000 
               
               
                 9.63805104 
                 −76.89174932 
                 0.00000000 
               
               
                   
               
             
          
         
       
     
         [0255]    An overall reflectivity of the projection optical unit  27  is 7.89%. 
         [0256]    The projection optical unit  27  has a reducing imaging scale of 8×(β=8). 
         [0257]    The image field  8  has an x-extent of two times 6.5 mm and a y-extent of 1 mm. The projection optical unit  27  is optimized for an operating wavelength of the illumination light  3  of 13.5 nm. 
         [0258]    In the projection optical unit  27 , a pupil plane  18  is arranged in the imaging beam path between the mirrors M 3  and M 4 . Unlike what is depicted schematically, the pupil plane  18  is tilted in relation to a chief ray of the central field point. An intermediate image plane  19  is arranged in the imaging beam path between the mirrors M 4  and M 5 , near the mirror M 4 . 
         [0259]    In the projection optical unit  27 , the mirrors M 3  and M 4  on the one hand and M 6  and M 7  on the other hand form pairs of mirrors for grazing incidence, the deflecting effect of which on the imaging light  3  adds up. 
         [0260]    The mirrors M 1 , M 4 , M 6 , M 7  and M 8  have positive values for the radius, i.e. are, in principle, convex mirrors. The mirrors M 2 , M 3 , M 5  and M 9  have negative values for the radius, i.e. are, in principle, concave mirrors. The mirrors M 1 , M 3 , M 4 , M 6  and M 7  have very large absolute radii, i.e. only constitute small deviations from plane reflection surfaces. 
         [0261]    It is in turn the case in the projection optical unit  27  that the mirror M 9  is the only mirror including a passage opening  17  for the passage of the imaging light  3  guided between the mirrors M 7  and M 8 . 
         [0262]    In the projection optical unit  27 , a z-distance between the object plane  5  and the image plane  9  is approximately 1700 mm. 
         [0263]    In the projection optical unit  27 , a typical diameter of the largest mirror M 9  is approximately 730 mm. 
         [0264]    In the projection optical unit  27 , an object/image offset d OIS  is approximately 1000 mm. In the projection optical unit  27 , the object field-side chief rays  16  also include an angle CRAO of 5.5° with a normal of the object plane  5 . 
         [0265]    The projection optical unit  27  has a scanned RMS value of the image field-side wavefront which is approximately 30 mλ. An image field-side distortion value is approximately 0.6 nm in the projection optical unit  27 . 
         [0266]    A stop effective for the x-dimension can be arranged in the beam path of the imaging light  3  between the mirrors M 2  and M 3 . In the projection optical unit  27 , a stop effective for the y-dimension can be arranged in the beam path between the mirrors M 3  and M 4 . 
         [0267]    Chief rays  16  in the projection optical unit  27  have a divergent propagation in the beam path of the imaging light  3  between the object field  4  and the mirror M 1 . 
         [0268]    The mirror M 9  defines an image-side obscuration which, over the x-dimension, is less than 20% of the image-side numerical aperture of the projection optical unit  27 . In the y-direction, the obscuration is significantly smaller and moreover decentered. 
         [0269]    A further embodiment of a projection optical unit  28 , which can be used in the projection exposure apparatus  1  according to  FIG. 1  instead of e.g. the projection optical unit  7 , is explained in the following text on the basis of  FIG. 11 . Components and functions which were already explained above in the context of  FIGS. 1 to 10  are appropriately denoted by the same reference signs and are not discussed again in detail. 
         [0270]    The projection optical unit  28  has a total of eight mirrors M 1  to M 8 . The mirrors M 1 , M 4 , M 7  and M 8  are embodied as mirrors for normal incidence. The mirrors M 2 , M 3 , M 5  and M 6  are embodied as mirrors for grazing incidence. After the mirror M 4 , the beam path in the projection optical unit  28  corresponds qualitatively to the beam path after the mirror M 5  in the projection optical unit  27  according to  FIG. 10 , wherein the penultimate mirror M 7  in the projection optical unit  28  is arranged mirrored about a plane parallel to the xz-plane in comparison with the arrangement of the penultimate mirror M 8  of the projection optical unit  27 . 
         [0271]    In the beam guidance of the projection optical unit  28 , the chief rays  16  of the beam path cross between the mirrors M 1  and M 2  on the one hand and the beam path between the mirrors M 5  and M 6  on the other hand. 
         [0272]    The two mirrors M 2  and M 3  on the one hand and the two mirrors M 5  and M 6  on the other hand, for grazing incidence, are in each case embodied as a pair of mirrors, the deflecting effects of which add up. 
         [0273]    In the projection optical unit  28 , only the last mirror M 8  is embodied with a passage opening  17  for the passage of the imaging light  3  guided between the mirrors M 6  and M 7 . 
         [0274]    In the projection optical unit  28 , a z-distance of the object plane  5  from the image plane  9  is approximately 2000 mm. In the projection optical unit  28 , an object/image offset is approximately 1000 mm. 
         [0275]    A further embodiment of a projection optical unit  29 , which can be used in the projection exposure apparatus  1  according to  FIG. 1  instead of e.g. the projection optical unit  7 , is explained in the following text on the basis of  FIG. 12 . Components and functions which were already explained above in the context of  FIGS. 1 to 11  are appropriately denoted by the same reference signs and are not discussed again in detail. 
         [0276]    The projection optical unit  29  has a total of eight mirrors M 1  to M 8 . The mirrors M 1 , M 7  and M 8  are embodied as mirrors for normal incidence. The mirrors M 2 , M 3 , M 4 , M 5  and M 6  are embodied as mirrors for grazing incidence. Thus, the projection optical unit  29  has five mirrors for grazing incidence arranged in succession. All mirrors for grazing incidence M 2  to M 6  have an adding deflecting effect on the imaging light  3  in the projection optical unit  29 . 
         [0277]    After the mirror M 5 , the beam path in the projection optical unit  29  corresponds qualitatively to that in the projection optical unit  7  according to  FIG. 2 . 
         [0278]    In the projection optical unit  29 , only the last mirror M 8 , once again, includes a passage opening  17  for the passage of the imaging light  3  guided between the mirrors M 6  and M 7 . 
         [0279]    In the projection optical unit  29 , a z-distance between the object and image planes  5 ,  9 , parallel to one another, is approximately 2500 mm. In the projection optical unit  29 , an object/image offset is approximately 3000 mm. 
         [0280]    A further embodiment of a projection optical unit  30 , which can be used in the projection exposure apparatus  1  according to  FIG. 1  instead of e.g. the projection optical unit  7 , is explained in the following text on the basis of  FIG. 13 . Components and functions which were already explained above in the context of  FIGS. 1 to 12  are appropriately denoted by the same reference signs and are not discussed again in detail. 
         [0281]    The projection optical unit  30  has a total of eleven mirrors M 1  to M 11 . The mirrors M 5 , M 10  and M 11  are embodied as mirrors for normal incidence. The mirrors M 1 , M 2 , M 3 , M 4 , M 6 , M 7 , M 8  and M 9  are embodied as mirrors for grazing incidence. Thus, the projection optical unit  30  has two groups with in each case four mirrors for grazing incidence arranged in succession. The deflecting effects of the mirrors M 1  to M 4  for grazing incidence add up. The deflecting effects of the mirrors M 6  to M 9  for grazing incidence add up. 
         [0282]    After the mirror M 8 , the imaging beam path in the projection optical unit  30  corresponds qualitatively to that in the projection optical unit  28  according to  FIG. 11 , after the mirror M 4  therein, mirrored about a plane parallel to the xz-plane. 
         [0283]    A further embodiment of a projection optical unit  31 , which can be used in the projection exposure apparatus  1  according to  FIG. 1  instead of e.g. the projection optical unit  7 , is explained in the following text on the basis of  FIGS. 14 and 15 . Components and functions which were already explained above in the context of  FIGS. 1 to 13  are appropriately denoted by the same reference signs and are not discussed again in detail.  FIG. 14  shows a meridional section of the projection optical unit  31 .  FIG. 15  shows a sagittal view of the projection optical unit  31 . 
         [0284]    The projection optical unit  31  has a total of 8 mirrors M 1  to M 8  and, in terms of the basic design thereof, it is similar to e.g. the projection optical unit  7  according to  FIG. 2 . 
         [0285]    The mirrors M 1  to M 8  are once again embodied as free-form surface mirrors, for which the free-form surface equation (1), specified above, applies. The optical design data from the projection optical unit  31  can be gathered from the following tables, which, in terms of their design, correspond to the tables for the projection optical unit  7  according to  FIG. 2 . 
         [0000]    
       
         
               
               
               
             
               
               
               
               
             
               
               
               
             
           
               
                 TABLE 1 for FIG. 14/15 
               
               
                   
               
               
                   
                 Exemplary embodiment 
                 FIG. 14/15 
               
               
                   
               
             
             
               
                   
                 NA 
                 0.6 
               
             
          
           
               
                   
                 Wavelength 
                 13.5 
                 nm 
               
               
                   
                 Field dimension x 
                 13.0 
                 mm 
               
               
                   
                 Field dimension y 
                 1.2 
                 mm 
               
               
                   
                 Field curvature 
                 0.049315 
                 1/mm 
               
             
          
           
               
                   
                 Stop 
                 S9 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
               
               
             
               
               
               
               
               
               
             
           
               
                 TABLE 2 for FIG. 14/15 
               
               
                   
               
               
                 Surface 
                 Radius x[mm] 
                 Power x[1/mm] 
                 Radius y[mm] 
                 Power y[1/mm] 
                 Operating 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 M8 
                 −760.70350941 
                 0.00261095 
                 −690.41137663 
                 0.00291701 
                 REFL 
               
               
                 M7 
                 1660.51779822 
                 −0.00120425 
                 351.41973469 
                 −0.00569210 
                 REFL 
               
               
                 M6 
                 22413.77181938 
                 −0.00002294 
                 — 
                 0.00038276 
                 REFL 
               
               
                 M5 
                 — 
                 0.00000694 
                 6970.73341488 
                 −0.00134567 
                 REFL 
               
               
                 M4 
                 −1968.89132935 
                 0.00100852 
                 −1867.99412600 
                 0.00107840 
                 REFL 
               
               
                 M3 
                 −8443.92486351 
                 0.00004792 
                 −8485.60225377 
                 0.00116489 
                 REFL 
               
               
                 M2 
                 −2785.90885659 
                 0.00017702 
                 2068.91589871 
                 −0.00392049 
                 REFL 
               
               
                 M1 
                 19049.58074618 
                 −0.00009999 
                 −1346.04479234 
                 0.00156005 
                 REFL 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 3a for FIG. 14/15 
               
               
                   
               
               
                 Coefficient 
                 M8 
                 M7 
                 M6 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 KY 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 KX 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 RX 
                 −760.70350940  
                 1660.51779800 
                 22413.77182000 
               
               
                 C7 
                 −2.33007014e−08 
                 2.88578547e−07 
                 2.2753674e−07 
               
               
                 C9 
                 −1.18967539e−08 
                 −3.88069638e−07 
                 −1.7457017e−07 
               
               
                 C10 
                 −2.72776659e−11 
                 1.49271555e−09 
                 6.68609309e−10 
               
               
                 C12 
                 −7.0442837e−11  
                 5.59222539e−09  
                 −3.8203442e−10 
               
               
                 C14 
                 −2.75271127e−11 
                 6.67807776e−09 
                 −5.77862714e−10 
               
               
                 C16 
                 −2.23080012e−14  
                 1.04050752e−12 
                 −3.23543892e−12 
               
               
                 C18 
                 −4.50583763e−14 
                 −4.27223388e−12 
                 8.34265088e−13 
               
               
                 C20 
                 −1.4274792e−14 
                 −1.06939915e−11 
                 −2.23351616e−12 
               
               
                 C21 
                 −7.56087206e−17 
                 4.59226247e−15 
                 −3.59682046e−15 
               
               
                 C23 
                 −2.39764985e−16  
                 3.8987218e−14 
                 1.13689144e−14 
               
               
                 C25 
                 −2.30791712e−16  
                 1.29791609e−13 
                 −6.73241398e−16 
               
               
                 C27 
                 −6.65038444e−17  
                 1.43884373e−13 
                 −9.82855694e−15 
               
               
                 C29 
                 −2.53005387e−20  
                 1.04942825e−17  
                 2.27512685e−17 
               
               
                 C31 
                 −1.01909319e−19  
                 1.61698231e−17 
                 −3.69216305e−17 
               
               
                 C33 
                 −9.10891737e−20 
                 −1.87239071e−16 
                 −9.10355957e−20 
               
               
                 C35 
                 −2.22321038e−20  
                 −3.6078348e−16 
                 −4.66136303e−17 
               
               
                 C36 
                 −1.15852474e−22  
                 2.8817043e−20 
                 1.65439247e−19 
               
               
                 C38 
                 −6.28157898e−22  
                 3.07592107e−19 
                 −6.87738716e−22 
               
               
                 C40 
                 −9.6788962e−22  
                 1.31683563e−18  
                 1.27689461e−19 
               
               
                 C42 
                 −6.41461387e−22 
                 3.2410417e−18  
                 −8.59875947e−22 
               
               
                 C44 
                 −1.5313164e−22 
                 3.93814067e−18 
                 −2.18742961e−19 
               
               
                 C46 
                 −1.13873934e−25 
                 1.33094976e−22 
                 −8.48120432e−22 
               
               
                 C48 
                 −2.12040282e−25 
                 −1.87148715e−22 
                 8.70636092e−22 
               
               
                 C50 
                 −3.26381834e−25 
                 −2.12882905e−21 
                 5.2058061e−22 
               
               
                 C52 
                 −1.88634319e−25 
                 −8.06669662e−21 
                 1.43430743e−22 
               
               
                 C54 
                 −3.77802198e−26 
                 −1.65415378e−20 
                 −8.35116913e−22 
               
               
                 C55 
                 −2.78299672e−28 
                 1.62987882e−25 
                 −1.26276164e−23 
               
               
                 C57 
                 −1.13733455e−27 
                 3.09234722e−24 
                 −1.06004981e−23 
               
               
                 C59 
                 −2.50973358e−27 
                 2.05233308e−23 
                 −1.18561349e−23 
               
               
                 C61 
                 −2.36012273e−27 
                 6.71690321e−23 
                 −4.77169105e−25 
               
               
                 C63 
                 −1.07735394e−27 
                 1.14300682e−22 
                 2.74390777e−25 
               
               
                 C65 
                 −1.68978578e−28 
                 8.85821016e−23 
                 −3.96110871e−24 
               
               
                 C67 
                 1.51915362e−32 
                 −2.32859315e−27 
                 8.22294799e−26 
               
               
                 C69 
                 −5.49655364e−31 
                 1.39198769e−26 
                 −4.76626411e−26 
               
               
                 C71 
                 −1.02066385e−30 
                 6.61474215e−26 
                 −9.93012444e−26 
               
               
                 C73 
                 −1.18308652e−30 
                 4.75522732e−26 
                 −6.29472298e−26 
               
               
                 C75 
                 −5.84567673e−31 
                 −7.56976341e−26 
                 −5.49230676e−27 
               
               
                 C77 
                 −1.06877542e−31 
                 6.97381799e−26 
                 −4.17957059e−26 
               
               
                 C78 
                 −6.57287449e−34 
                 −1.11031193e−30 
                 5.04699814e−28 
               
               
                 C80 
                 −4.98973258e−33 
                 −3.42075816e−29 
                 3.32058589e−28 
               
               
                 C82 
                 −1.47067638e−32 
                 −1.97911989e−28 
                 1.10888783e−27 
               
               
                 C84 
                 −2.39766693e−32 
                 −8.4948077e−28 
                 9.24713394e−29 
               
               
                 C86 
                 −2.10528972e−32 
                 −4.47266704e−28 
                 −1.36080649e−28 
               
               
                 C88 
                 −9.49212101e−33 
                 3.40835449e−27 
                 −3.22056057e−29 
               
               
                 C90 
                 −1.85536567e−33 
                 6.09359424e−27 
                 −3.22300574e−28 
               
               
                 C92 
                 1.14904466e−37 
                 4.55084533e−32 
                 −2.32548127e−30 
               
               
                 C94 
                 −3.94852331e−37 
                 −6.02019105e−32 
                 2.65660093e−30 
               
               
                 C96 
                 −6.82573646e−37 
                 −1.80150194e−30 
                 4.77721528e−30 
               
               
                 C98 
                 3.49439171e−37 
                 −6.96859581e−30 
                 4.3682388e−30 
               
               
                 C100 
                 8.37743218e−37 
                 −2.35053497e−29 
                 1.52429646e−30 
               
               
                 C102 
                 4.22187524e−37 
                 −7.01661753e−29 
                 −1.0247849e−31 
               
               
                 C104 
                 1.07716944e−37 
                 −9.6147079e−29 
                 −1.20989386e−30 
               
               
                 C105 
                 7.66857985e−40 
                 4.18651817e−35 
                 −8.36182433e−33 
               
               
                 C107 
                 5.95979105e−39 
                 1.31671069e−33 
                 −3.54017002e−33 
               
               
                 C109 
                 2.67422787e−38 
                 9.8779453e−33 
                 −4.83481101e−32 
               
               
                 C111 
                 6.45464453e−38 
                 5.60289315e−32 
                 −8.16147728e−33 
               
               
                 C113 
                 8.78194876e−38 
                 1.58284154e−31 
                 1.4522278e−32 
               
               
                 C115 
                 6.57244583e−38 
                 2.85637687e−31 
                 5.61495185e−33 
               
               
                 C117 
                 2.60731766e−38 
                 4.34645199e−31 
                 −2.42083693e−34 
               
               
                 C119 
                 4.80920542e−39 
                 4.05075079e−31 
                 −1.74525827e−33 
               
               
                 C121 
                 −7.24465698e−43 
                 0 
                 0 
               
               
                 C123 
                 −5.06090521e−42 
                 0 
                 0 
               
               
                 C125 
                 −2.11201601e−41 
                 0 
                 0 
               
               
                 C127 
                 −3.93520662e−41 
                 0 
                 0 
               
               
                 C129 
                 −4.26707116e−41 
                 0 
                 0 
               
               
                 C131 
                 −2.6866198e−41 
                 0 
                 0 
               
               
                 C133 
                 −9.02589569e−42 
                 0 
                 0 
               
               
                 C135 
                 −1.35713124e−42 
                 0 
                 0 
               
               
                 C136 
                 −6.18315205e−45 
                 0 
                 0 
               
               
                 C138 
                 −5.64222317e−44 
                 0 
                 0 
               
               
                 C140 
                 −2.25923694e−43 
                 0 
                 0 
               
               
                 C142 
                 −5.2742383e−43 
                 0 
                 0 
               
               
                 C144 
                 −7.72344846e−43 
                 0 
                 0 
               
               
                 C146 
                 −7.07223784e−43 
                 0 
                 0 
               
               
                 C148 
                 −3.9358099e−43 
                 0 
                 0 
               
               
                 C150 
                 −1.23782731e−43 
                 0 
                 0 
               
               
                 C152 
                 −1.76195917e−44 
                 0 
                 0 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 3b for FIG. 14/15 
               
               
                   
               
               
                 Coefficient 
                 M5 
                 M4 
                 M3 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 KY 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 KX 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 RX 
                 −61404.35326000 
                 −1968.89132900 
                 −8443.92486400 
               
               
                 C7 
                 −1.68207907e−07 
                 −9.69253223e−08 
                 −1.61488272e−08 
               
               
                 C9 
                 −1.68739886e−07 
                 −4.92868764e−07 
                 2.12423419e−08 
               
               
                 C10 
                 1.37381131e−10 
                 −4.29245796e−12 
                 −3.01016486e−11 
               
               
                 C12 
                 1.73273328e−10 
                 2.8015583e−10 
                 −3.01270218e−11 
               
               
                 C14 
                 3.39901777e−10 
                 2.62958278e−09 
                 −3.12591627e−11 
               
               
                 C16 
                 −2.02771855e−13 
                 −6.55098858e−14 
                 5.94264568e−14 
               
               
                 C18 
                 −2.74086745e−13 
                 −2.19243624e−12 
                 1.84091903e−14 
               
               
                 C20 
                 −1.11184944e−12 
                 −1.64987945e−11 
                 2.75233054e−14 
               
               
                 C21 
                 −1.66473292e−16 
                 5.11085588e−18 
                 5.26119437e−17 
               
               
                 C23 
                 −1.53971529e−16 
                 5.55797544e−16 
                 −6.75020173e−17 
               
               
                 C25 
                 −1.4400902e−16 
                 1.63350353e−14 
                 −5.16160437e−17 
               
               
                 C27 
                 2.78000528e−15 
                 1.23712765e−13 
                 −3.82616113e−17 
               
               
                 C29 
                 −4.21493833e−19 
                 −8.59118066e−20  
                 −6.89623715e−20 
               
               
                 C31 
                 1.37929257e−18 
                 −5.35246837e−18 
                 6.50922922e−20 
               
               
                 C33 
                 7.35166575e−18 
                 −1.3798481e−16 
                 5.66413099e−20 
               
               
                 C35 
                 −2.94790982e−17 
                 −8.56072868e−16 
                 4.52051441e−20 
               
               
                 C36 
                 −3.95620249e−21 
                 3.9780575e−23 
                 −1.10791979e−21 
               
               
                 C38 
                 7.20372936e−21 
                 1.07488208e−21 
                 −3.83039519e−22 
               
               
                 C40 
                 −3.66632457e−20 
                 7.37896563e−20 
                 −8.63659651e−23 
               
               
                 C42 
                 1.11889421e−19 
                 1.33985205e−18 
                 −9.65351264e−23 
               
               
                 C44 
                 −2.23316105e−19 
                 5.21035424e−18 
                 −6.41320506e−23 
               
               
                 C46 
                 6.98222374e−23 
                 4.14830144e−25 
                 9.00262127e−25 
               
               
                 C48 
                 1.89025842e−23 
                 −2.64909189e−23 
                 1.42487114e−24 
               
               
                 C50 
                 −6.54336013e−22 
                 −9.0106405e−22 
                 3.32110828e−25 
               
               
                 C52 
                 2.37305051e−21 
                 −6.69630166e−21 
                 1.54439296e−25 
               
               
                 C54 
                 −2.44135026e−21 
                 −4.36511688e−20 
                 7.91478948e−26 
               
               
                 C55 
                 3.57408258e−26 
                 6.04631528e−29 
                 4.61140016e−27 
               
               
                 C57 
                 −5.70542383e−25 
                 −2.22061343e−27 
                 1.19061262e−26 
               
               
                 C59 
                 2.23346131e−24 
                 −3.29453086e−25  
                 −2.43403831e−27 
               
               
                 C61 
                 −1.08608159e−23 
                 −3.59843538e−24  
                 −1.04602448e−27 
               
               
                 C63 
                 4.01727698e−23 
                 1.17803737e−22 
                 −3.01269966e−28 
               
               
                 C65 
                 −3.08466704e−23 
                 1.2589272e−21 
                 −9.07944125e−29 
               
               
                 C67 
                 −9.09279986e−28 
                 −2.73791414e−30  
                 −1.05225381e−29 
               
               
                 C69 
                 1.84008908e−28 
                 1.67755413e−28 
                 −3.76114547e−29 
               
               
                 C71 
                 2.98171505e−26 
                 7.89504238e−27 
                 1.08887944e−30 
               
               
                 C73 
                 −1.45773298e−25 
                 1.37144291e−25 
                 9.62125603e−31 
               
               
                 C75 
                 5.4755988e−25 
                 −1.75156336e−24 
                 4.40838424e−31 
               
               
                 C77 
                 −6.88817386e−25 
                 0 
                 1.65923732e−31 
               
               
                 C78 
                 −1.93722111e−31 
                 −6.27481076e−34 
                 −4.32487572e−32 
               
               
                 C80 
                 8.17303266e−30 
                 2.11008905e−32 
                 −1.14299001e−31 
               
               
                 C82 
                 −6.67999871e−29  
                 5.2310253e−30  
                 4.65450563e−32 
               
               
                 C84 
                 2.67006152e−28 
                 3.0291707e−28  
                 8.73563385e−33 
               
               
                 C86 
                 −1.53075751e−27 
                 2.20926318e−27 
                 1.52319789e−33 
               
               
                 C88 
                 5.16885409e−27  
                 2.74028858e−27  
                 −7.11278706e−34 
               
               
                 C90 
                 −8.23017746e−27 
                 0 
                 −4.3534126e−34 
               
               
                 C92 
                 9.28021791e−33  
                 1.61499153e−35 
                 3.4340304e−34 
               
               
                 C94 
                 1.69089847e−32  
                 −8.96493937e−34 
                 3.93253353e−34 
               
               
                 C96 
                 −3.39525427e−31 
                 −7.08991192e−32 
                 −4.73501064e−35 
               
               
                 C98 
                 1.66641579e−30  
                 −3.0950904e−30  
                 −2.05074664e−35 
               
               
                 C100 
                 −9.51326703e−30 
                 −9.26698789e−29 
                 −2.50411785e−36 
               
               
                 C102 
                 2.94059028e−29 
                 0 
                 1.04321451e−36 
               
               
                 C104 
                 −4.69127888e−29 
                 0 
                 6.43577491e−37 
               
               
                 C105 
                 −1.7696216e−36  
                 4.64103982e−39  
                 −1.04049749e−37 
               
               
                 C107 
                 −8.97432009e−35 
                 2.19653265e−38  
                 −4.82828467e−37 
               
               
                 C109 
                 5.43884259e−34  
                 −1.60384827e−35 
                 −3.57026561e−37 
               
               
                 C111 
                 −8.8263867e−34  
                 −2.16883676e−33 
                 6.55702741e−38 
               
               
                 C113 
                 5.276912e−33 
                 −4.68627022e−32 
                 6.67841412e−39 
               
               
                 C115 
                 −2.42873892e−32 
                 −1.04759785e−30 
                 8.77078073e−40 
               
               
                 C117 
                 7.30432753e−32 
                 0 
                 −6.91810729e−40 
               
               
                 C119 
                 −1.02386637e−31 
                 0 
                 −3.62760873e−40 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
             
               
               
               
             
           
               
                 TABLE 3c for FIG. 14/15 
               
               
                   
               
               
                 Coefficient 
                 M2 
                 M1 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 KY 
                 0.00000000 
                 0.00000000 
               
               
                 KX 
                 0.00000000 
                 0.00000000 
               
               
                 RX 
                 −2785.90885700 
                 19049.58075000 
               
               
                 C7 
                 1.02179797e−07 
                 −1.83712276e−07 
               
               
                 C9 
                 2.08877338e−07 
                 −4.58660126e−08 
               
               
                 C10 
                 −2.19824304e−10 
                 −1.67890734e−11 
               
               
                 C12 
                 −4.14802496e−10 
                 4.67483698e−11 
               
               
                 C14 
                 9.46958508e−10  
                 1.1339512e−11 
               
               
                 C16 
                 6.64712822e−13 
                 −2.5185941e−13 
               
               
                 C18 
                 1.1708882e−13  
                 −6.01722521e−13 
               
               
                 C20 
                 2.83635538e−12 
                 −4.88209081e−14 
               
               
                 C21 
                 2.7928674e−16  
                 −2.02129522e−18 
               
               
                 C23 
                 1.42351482e−15 
                 −7.27365863e−16 
               
               
                 C25 
                 −1.92431341e−15 
                 4.83885181e−16 
               
               
                 C27 
                 8.77128791e−15 
                 −1.97905684e−17 
               
               
                 C29 
                 7.21451366e−18 
                 −1.28398658e−18 
               
               
                 C31 
                 6.30102696e−18 
                 9.94551948e−19 
               
               
                 C33 
                 3.50555759e−18 
                 1.88504443e−18 
               
               
                 C35 
                 3.12699312e−17 
                 1.06434779e−19 
               
               
                 C36 
                 −3.68339425e−20 
                 −2.27688495e−21 
               
               
                 C38 
                 3.61485045e−20 
                 −1.70028002e−20 
               
               
                 C40 
                 5.05283454e−21 
                 −1.07042666e−20 
               
               
                 C42 
                 1.99680032e−21 
                 1.04162271e−20 
               
               
                 C44 
                 1.24570222e−19 
                 −1.55097266e−21 
               
               
                 C46 
                 −3.21749539e−22 
                 5.12417577e−23 
               
               
                 C48 
                 1.68890864e−22  
                 −3.98185412e−23 
               
               
                 C50 
                 1.15552342e−24  
                 −5.91175233e−23 
               
               
                 C52 
                 −1.84254516e−23 
                 −1.14320553e−22 
               
               
                 C54 
                 3.61172897e−22 
                 −6.223901e−23 
               
               
                 C55 
                 2.57524069e−25  
                 1.13131912e−25 
               
               
                 C57 
                 −1.72472199e−24 
                 8.57655135e−25 
               
               
                 C59 
                 2.79637731e−25  
                 2.11373459e−24 
               
               
                 C61 
                 −2.11635905e−24 
                 2.45014709e−25 
               
               
                 C63 
                 −3.38605775e−24 
                 −5.95868212e−25 
               
               
                 C65 
                 −5.51007018e−25 
                 −8.97281776e−26 
               
               
                 C67 
                 1.78442615e−27  
                 −3.12729249e−28 
               
               
                 C69 
                 −4.68488975e−27 
                 1.28492955e−26 
               
               
                 C71 
                 1.54333938e−26  
                 2.09200168e−26 
               
               
                 C73 
                 1.94658666e−26  
                 1.65108524e−26 
               
               
                 C75 
                 6.09850146e−27  
                 7.04786074e−27 
               
               
                 C77 
                 4.18619136e−27 
                 4.5184573e−27 
               
               
                 C78 
                 1.54200314e−31 
                 −1.32478619e−30 
               
               
                 C80 
                 6.95048519e−30  
                 2.51954717e−29 
               
               
                 C82 
                 −3.04720781e−29 
                 −3.83569962e−29 
               
               
                 C84 
                 5.24989858e−29  
                 −4.69742338e−30 
               
               
                 C86 
                 2.04128459e−28  
                 4.07157123e−29 
               
               
                 C88 
                 2.00406824e−28  
                 3.07404295e−29 
               
               
                 C90 
                 9.4685541e−29  
                 1.13319109e−29 
               
               
                 C92 
                 3.87396229e−32  
                 −6.19892982e−32 
               
               
                 C94 
                 6.51760335e−32  
                 −6.54903162e−31 
               
               
                 C96 
                 −2.20158879e−31 
                 −1.35223368e−30 
               
               
                 C98 
                 −3.33335228e−31 
                 −1.59978619e−30 
               
               
                 C100 
                 −1.8982851e−31  
                 −9.29567239e−31 
               
               
                 C102 
                 2.55028572e−32  
                 −2.74472497e−31 
               
               
                 C104 
                 9.15729393e−32  
                 −1.39144572e−31 
               
               
                 C105 
                 1.54616461e−35  
                 −4.43620458e−35 
               
               
                 C107 
                 2.57448706e−34  
                 −2.24105011e−33 
               
               
                 C109 
                 4.15070906e−34  
                 −4.2791598e−33 
               
               
                 C111 
                 −4.57189383e−34 
                 −5.88226204e−33 
               
               
                 C113 
                 −2.7712617e−33  
                 −7.99527615e−33 
               
               
                 C115 
                 −5.61503186e−33 
                 −4.25467966e−33 
               
               
                 C117 
                 −3.62496099e−33 
                 −1.32244101e−33 
               
               
                 C119 
                 −9.3965259e−34  
                 −5.41759129e−34 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 4a for FIG. 14/15 
               
               
                   
               
               
                 Surface 
                 DCX 
                 DCY 
                 DCZ 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 Image plane 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 M8 
                 0.00000000 
                 1.58228046 
                 644.46684396 
               
               
                 M7 
                 0.00000000  
                 −130.94320893 
                 86.28913162 
               
               
                 M6 
                 −0.00000000 
                 79.00389588 
                 1146.86693841 
               
               
                 M5 
                 −0.00000000 
                 315.04839618 
                 1400.80720652 
               
               
                 M4 
                 −0.00000000 
                 708.31755783 
                 1568.71377057 
               
               
                 M3 
                 −0.00000000 
                 −353.76795180 
                 1371.20626759 
               
               
                 M2 
                 −0.00000000 
                 −1004.08161985 
                 938.25663352 
               
               
                 Stop 
                 −0.00000000 
                 −1059.88207749 
                 829.40621334 
               
               
                 M1 
                 −0.00000000  
                 −1419.83403251 
                 171.07007671 
               
               
                 Object plane 
                 −0.00000000 
                 −1596.59832123 
                 1556.09991381 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 4b for FIG. 14/15 
               
               
                   
               
               
                 Surface 
                 TLA[deg] 
                 TLB[deg] 
                 TLC[deg] 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 Image plane 
                 −0.00000000 
                 0.00000000 
                 −0.00000000 
               
               
                 M8 
                 −6.87697088 
                 0.00000000 
                 −0.00000000 
               
               
                 M7 
                 167.05654494 
                 0.00000000 
                 −0.00000000 
               
               
                 M6 
                 63.67723779 
                 −0.00000000 
                 0.00000000 
               
               
                 M5 
                 37.03218867 
                 −0.00000000 
                 −0.00000000 
               
               
                 M4 
                 −72.57292341 
                 0.00000000 
                 −0.00000000 
               
               
                 M3 
                 21.99697785 
                 −0.00000000  
                 −0.00000000 
               
               
                 M2 
                 47.89820238 
                 −0.00000000 
                 0.00000000 
               
               
                 Stop 
                 33.48047202 
                 −0.00000000 
                 180.00000000 
               
               
                 M1 
                 169.48262671 
                 0.00000000 
                 −0.00000000 
               
               
                 Object plane 
                 1.44970929 
                 −0.00000000 
                 0.00000000 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 5 for FIG. 14/15 
               
               
                   
               
               
                   
                 Surface 
                 Angle of incidence [deg] 
                 Reflectivity 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                   
                 M8 
                 6.74473267 
                 0.66088293 
               
               
                   
                 M7 
                 1.02118653 
                 0.66560218 
               
               
                   
                 M6 
                 75.10308995 
                 0.80563416 
               
               
                   
                 M5 
                 77.68931628 
                 0.84631558 
               
               
                   
                 M4 
                 6.86410776 
                 0.66070326 
               
               
                   
                 M3 
                 78.32667965 
                 0.85548939 
               
               
                   
                 M2 
                 75.72513685 
                 0.81598083 
               
               
                   
                 M1 
                 17.74444012 
                 0.62654454 
               
               
                   
                 Overall transmission 
                   
                 0.0867 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
             
               
               
               
             
           
               
                 TABLE 6 for FIG. 14/15 
               
               
                   
               
               
                 X[mm] 
                 Y[mm] 
                 Z[mm] 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 −0.00000000 
                 88.44258973 
                 0.00000000 
               
               
                 24.64699112 
                 87.07599581 
                 0.00000000 
               
               
                 48.84374950 
                 83.04125797 
                 0.00000000 
               
               
                 72.13433069 
                 76.52735358 
                 0.00000000 
               
               
                 94.05344206 
                 67.82941768 
                 0.00000000 
               
               
                 114.12656538 
                 57.32195581 
                 0.00000000 
               
               
                 131.87509715 
                 45.42746439 
                 0.00000000 
               
               
                 146.82707628 
                 32.58529760 
                 0.00000000 
               
               
                 158.53331961 
                 19.22513587 
                 0.00000000 
               
               
                 166.58810289 
                 5.74816752 
                 0.00000000 
               
               
                 170.65260767 
                 −7.48326159 
                 0.00000000 
               
               
                 170.47874487 
                 −20.14984875 
                 0.00000000 
               
               
                 165.93088822 
                 −31.97720096 
                 0.00000000 
               
               
                 157.00305460 
                 −42.73762190 
                 0.00000000 
               
               
                 143.82941376 
                 −52.25207120 
                 0.00000000 
               
               
                 126.68708163 
                 −60.39119625 
                 0.00000000 
               
               
                 105.99130912 
                 −67.07383413 
                 0.00000000 
               
               
                 82.28375334 
                 −72.26173300 
                 0.00000000 
               
               
                 56.21483844 
                 −75.94958583 
                 0.00000000 
               
               
                 28.52131067 
                 −78.15089981 
                 0.00000000 
               
               
                 0.00000000 
                 −78.88229478 
                 0.00000000 
               
               
                 −28.52131067 
                 −78.15089981 
                 0.00000000 
               
               
                 −56.21483844 
                 −75.94958583 
                 0.00000000 
               
               
                 −82.28375334 
                 −72.26173300 
                 0.00000000 
               
               
                 −105.99130912 
                 −67.07383413 
                 0.00000000 
               
               
                 −126.68708163 
                 −60.39119625 
                 0.00000000 
               
               
                 −143.82941376 
                 −52.25207120 
                 0.00000000 
               
               
                 −157.00305460 
                 −42.73762190 
                 0.00000000 
               
               
                 −165.93088822 
                 −31.97720096 
                 0.00000000 
               
               
                 −170.47874487 
                 −20.14984875 
                 0.00000000 
               
               
                 −170.65260767 
                 −7.48326159 
                 0.00000000 
               
               
                 −166.58810289 
                 5.74816752 
                 0.00000000 
               
               
                 −158.53331961 
                 19.22513587 
                 0.00000000 
               
               
                 −146.82707628 
                 32.58529760 
                 0.00000000 
               
               
                 −131.87509715 
                 45.42746439 
                 0.00000000 
               
               
                 −114.12656538 
                 57.32195581 
                 0.00000000 
               
               
                 −94.05344206 
                 67.82941768 
                 0.00000000 
               
               
                 −72.13433069 
                 76.52735358 
                 0.00000000 
               
               
                 −48.84374950 
                 83.04125797 
                 0.00000000 
               
               
                 −24.64699112 
                 87.07599581 
                 0.00000000 
               
               
                   
               
             
          
         
       
     
         [0286]    An overall reflectivity of the projection optical unit  31  is 8.67%. 
         [0287]    The projection optical unit  31  has an image-side numerical aperture of 0.6. The image field  8  has an x-extent of two times 6.5 mm and a y-extent of 1.20 mm. The image field  8  is curved symmetrically with respect to the y-axis with a radius of curvature of e.g. 20.28 mm. Thus, the projection optical unit  31  has arced fields and no rectangular fields. The projection optical unit  31  is optimized for an operating wavelength of the illumination light  3  of 13.5 nm. 
         [0288]    The projection optical unit  31  has exactly eight mirrors M 1  to M 8 . The mirrors M 2  and M 3  on the one hand, and M 5 , M 6  on the other hand are embodied as mirrors for grazing incidence and are arranged in each case as a mirror pair directly behind one another in the imaging beam path. The projection optical unit  31  has exactly four mirrors for grazing incidence, namely the mirrors M 2 , M 3 , M 5  and M 6 . The mirrors M 1 , M 4 , M 7  and M 8  are embodied as mirrors for normal incidence. 
         [0289]    In the projection optical unit  31 , a stop  18  is arranged in the beam path between the mirrors M 1  and M 2 , near the grazing incidence on the mirror M 2 . Alternatively or additionally, a stop can be arranged directly on the surface of the mirror M 2 . 
         [0290]    The projection optical unit  31  has a reducing imaging scale β=8.00. 
         [0291]    An angle of incidence of the chief rays  16  in the object plane  5  is 6.3°. 
         [0292]    In the meridional section according to  FIG. 14 , the chief rays extend between the object field  4  and the mirror M 1  in a divergent manner. In the yz-plane, an entrance pupil of the projection optical unit  31  lies −3500 mm in front of the object field  4  in the beam path of the illumination light. In the xz-plane (cf.  FIG. 15 ), the entrance pupil lies 2100 mm after the object field in the imaging beam path of the projection optical unit  31 . 
         [0293]    In the xz-section (cf.  FIG. 15 ), the stop  18  can lie at a position displaced in the z-direction compared to its position in the yz-section. 
         [0294]    A z-distance between the object field  4  and the image field  8  is approximately 1600 mm. 
         [0295]    An object/image offset (d OIS ) is approximately 1560 mm. 
         [0296]    A free working distance between the mirror M 7  and the image field  8  is 61 mm. 
         [0297]    In the projection optical unit  31 , a scanned RMS value for the wavefront aberration is at most 8 mλ and, on average, 7 mλ. 
         [0298]    A maximum distortion value is at most 0.12 nm in the x-direction and at most 0.08 nm in the y-direction. A telecentricity value in the x-direction is at most 0.61 mrad on the image field-side and a telecentricity value in the y-direction is at most 1.16 mrad on the image field-side. 
         [0299]    Further mirror data emerge from the following table. 
         [0000]    
       
         
               
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
               
             
           
               
                   
                 TABLE 7 for FIG. 14/15 
               
               
                   
                   
               
               
                   
                 M1 
                 M2 
                 M3 
                 M4 
                 M5 
                 M6 
                 M7 
                 M8 
               
               
                   
                   
               
             
             
               
                   
               
             
          
           
               
                 Maximum angle of incidence [deg] 
                 18.4 
                 78.2 
                 79.3 
                 10.8 
                 82.3 
                 78.9 
                 18.8 
                 7.3 
               
               
                 Mirror extent (x) [mm] 
                 245.4 
                 366.0 
                 506.8 
                 606.2 
                 426.9 
                 218.7 
                 323.2 
                 804.5 
               
               
                 Mirror extent (y) [mm] 
                 246.9 
                 252.0 
                 795.8 
                 84.5 
                 175.8 
                 270.5 
                 173.3 
                 788.5 
               
               
                 Maximum mirror diameter [mm] 
                 252.6 
                 366.3 
                 803.8 
                 606.2 
                 426.9 
                 281.1 
                 323.4 
                 805.8 
               
               
                   
               
             
          
         
       
     
         [0300]    There is an intermediate image  19  in the beam path in the region of a reflection on the mirror M 5  in the yz-plane ( FIG. 14 ) and in the imaging beam path region between the mirrors M 6  and M 7  in the xz-plane ( FIG. 15 ). 
         [0301]    The mirror M 8  is obscured and includes a passage opening  17  for the passage of the illumination light  3  in the imaging beam path between the mirrors M 6  and M 7 . 
         [0302]    Only the last mirror M 8  in the imaging beam path includes a passage opening  17  for the imaging light  3 . All other mirrors M 1  to M 7  have a continuous reflection surface. The reflection surface of the mirror M 8  is used around the passage opening  17  thereof. 
         [0303]    The mirrors M 1 , M 3 , M 4 , M 6  and M 8  have negative values for the radius, i.e. are, in principle, concave mirrors. The other mirrors M 2 , M 5  and M 7  have positive values for the radius, i.e. are, in principle, convex mirrors. The mirrors M 2 , M 3 , M 5  and M 6  for grazing incidence have very large radii and only constitute small deviations from plane reflection surfaces. 
         [0304]      FIG. 15A  shows edge contours of the surfaces on the mirrors M 1  to M 8  of the projection optical unit  31  which are in each case impinged upon by illumination light  3 , i.e. the so-called footprints of the mirrors M 1  to M 8 . These edge contours are in each case depicted in an x/y-diagram which corresponds to the local x- and y-coordinates of the respective mirror M 1  to M 8 . The illustrations are true to scale in millimeters. The mirrors M 1 , M 2 , M 6  and M 8  have an x/y-aspect ratio which does not deviate, or only deviates slightly, from the value 1. The mirror M 3  has an x/y-aspect ratio of approximately 0.55. The mirror M 4  has an x/y-aspect ratio of approximately 7.5. The mirror M 5  has an x/y-aspect ratio of approximately 2.5. The mirror M 7  has an x/y-aspect ratio of approximately 2. 
         [0305]    A further embodiment of a projection optical unit  32 , which can be used in the projection exposure apparatus  1  according to  FIG. 1  instead of e.g. the projection optical unit  7 , is explained in the following text on the basis of  FIGS. 16 and 17 . Components and functions which were already explained above in the context of  FIGS. 1 to 15  are appropriately denoted by the same reference signs and are not discussed again in detail.  FIG. 16  shows a meridional section of the projection optical unit  32 .  FIG. 17  shows a sagittal view of the projection optical unit  32 . 
         [0306]    The projection optical unit  32  has a total of 8 mirrors M 1  to M 8  and, in terms of the basic design thereof, it is similar to e.g. the projection optical unit  7  according to  FIG. 2 . 
         [0307]    The mirrors M 1  to M 8  are once again embodied as free-form surface mirrors, for which the free-form surface equation (1), specified above, applies. The optical design data from the projection optical unit  32  can be gathered from the following tables, which, in terms of their design, correspond to the tables for the projection optical unit  7  according to  FIG. 2 . 
         [0000]    
       
         
               
               
               
             
               
               
               
               
             
               
               
               
             
           
               
                 TABLE 1 for FIG. 16/17 
               
               
                   
               
               
                   
                 Exemplary embodiment 
                 FIG. 16/17 
               
               
                   
               
             
             
               
                   
                 NA 
                 0.63 
               
             
          
           
               
                   
                 Wavelength 
                 13.5 
                 nm 
               
               
                   
                 Field dimension x 
                 13.0 
                 mm 
               
               
                   
                 Field dimension y 
                 1.2 
                 mm 
               
               
                   
                 Field curvature 
                 0.0 
                 1/mm 
               
             
          
           
               
                   
                 Stop 
                 S9 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
               
               
             
               
               
               
               
               
               
             
           
               
                 TABLE 2 for FIG. 16/17 
               
               
                   
               
               
                 Surface 
                 Radius x[mm] 
                 Power x[1/mm] 
                 Radius y[mm] 
                 Power y[1/mm] 
                 Operating 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 M8 
                 −931.70840871 
                 0.00212869 
                 −869.27604763 
                 0.00232012 
                 REFL 
               
               
                 M7 
                 2483.73117622 
                 −0.00080462 
                 590.74829460 
                 −0.00338815 
                 REFL 
               
               
                 M6 
                 4073.92459627 
                 −0.00009230 
                 18265.52467135 
                 −0.00058241 
                 REFL 
               
               
                 M5 
                 7333.37887582 
                 −0.00006439 
                 2756.23195835 
                 −0.00307339 
                 REFL 
               
               
                 M4 
                 −2343.60828683 
                 0.00084551 
                 −1275.30707722 
                 0.00158285 
                 REFL 
               
               
                 M3 
                 −8176.83666005 
                 0.00004510 
                 −22705.81965249 
                 0.00047771 
                 REFL 
               
               
                 M2 
                 −2347.82420977 
                 0.00014956 
                 5323.37610244 
                 −0.00213994 
                 REFL 
               
               
                 M1 
                 7536.03761813 
                 −0.00025355 
                 −1766.43613919 
                 0.00118510 
                 REFL 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 3a for FIG. 16/17 
               
               
                   
               
               
                 Coefficient 
                 M8 
                 M7 
                 M6 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 KY 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 KX 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 RX 
                 −931.70840870  
                 2483.73117600  
                 4073.92459600 
               
               
                 C7 
                 −2.91071984e−08 
                   1.03086086e−08 
                   1.42663812e−08 
               
               
                 C9 
                  −1.4873513e−08  
                 −2.95346773e−07 
                 −1.46095442e−08 
               
               
                 C10 
                 −1.35088934e−11 
                   7.46509583e−10  
                   1.66564805e−10 
               
               
                 C12 
                 −3.04656958e−11 
                   1.97488711e−09  
                   4.76376807e−11 
               
               
                 C14 
                  −1.4685502e−11 
                   1.96447383e−09  
                 −6.83009219e−11 
               
               
                 C16 
                  −2.0880499e−14 
                 −2.54564229e−13 
                 −4.64702132e−13 
               
               
                 C18 
                 −3.50367731e−14 
                 −1.15902664e−12 
                   4.62582078e−14 
               
               
                 C20 
                 −1.30121192e−14 
                 −2.52789708e−12 
                 −2.03948925e−13 
               
               
                 C21 
                 −2.58185385e−17 
                    1.1522247e−15  
                  −2.7157107e−17 
               
               
                 C23 
                 −7.74145665e−17 
                   7.55596284e−15 
                   9.77435168e−16 
               
               
                 C25 
                 −7.78695864e−17 
                   1.95378488e−14 
                    2.0332385e−16 
               
               
                 C27 
                 −2.47396927e−17 
                   1.84775168e−14 
                 −6.22309514e−16 
               
               
                 C29 
                 −1.76814258e−20 
                   2.09437366e−18 
                 −1.49864939e−19 
               
               
                 C31 
                 −5.60530841e−20 
                   5.96908377e−19 
                 −9.33357714e−19 
               
               
                 C33 
                 −4.97811363e−20 
                 −2.08627141e−17 
                   3.07259452e−19 
               
               
                 C35 
                  −1.3997665e−20 
                 −3.46362367e−17 
                 −1.96498619e−18 
               
               
                 C36 
                 −3.36480331e−23 
                    5.9536477e−21  
                 −5.41486656e−21 
               
               
                 C38 
                 −1.43652378e−22 
                   3.57217041e−20 
                  −2.3879585e−21 
               
               
                 C40 
                 −2.19649946e−22 
                   1.05418252e−19 
                    1.2923996e−21 
               
               
                 C42 
                 −1.50444552e−22 
                   2.35618312e−19  
                  −1.0808335e−21 
               
               
                 C44 
                 −3.74578417e−23 
                   1.91215151e−19  
                 −6.45753285e−21 
               
               
                 C46 
                 −3.13089528e−26 
                 −3.39340782e−23 
                 −3.83895365e−23 
               
               
                 C48 
                 −7.18534794e−26 
                 −6.31648018e−23 
                   −1.051438e−22 
               
               
                 C50 
                 −1.09073223e−25 
                 −3.26404881e−22 
                 −2.85984644e−23 
               
               
                 C52 
                 −6.83064745e−26 
                 −9.21698689e−22 
                 −1.08466535e−23 
               
               
                 C54 
                 −1.42936475e−26 
                 −6.02090954e−22 
                 −2.26713596e−23 
               
               
                 C55 
                 −1.98418542e−29 
                 −2.78722687e−26 
                   1.37273683e−25 
               
               
                 C57 
                 −1.18366952e−28 
                   4.63896896e−26 
                   4.78797534e−25 
               
               
                 C59 
                 −2.85319764e−28 
                   8.94639444e−25 
                    2.0872644e−25 
               
               
                 C61 
                 −2.84788816e−28 
                   2.79795669e−24 
                   4.69038748e−27 
               
               
                 C63 
                 −1.29159985e−28 
                   3.56080821e−24 
                 −5.79635406e−28 
               
               
                 C65 
                 −2.10189947e−29 
                    2.1127208e−24  
                 −8.21926722e−26 
               
               
                 C67 
                 −2.32273683e−32 
                    4.1958734e−28 
                   3.52289657e−27 
               
               
                 C69 
                 −2.40813769e−31 
                   6.21640783e−28  
                   6.54476369e−27 
               
               
                 C71 
                 −4.32683743e−31 
                   5.44469541e−27 
                   1.39064733e−27 
               
               
                 C73 
                 −4.15492269e−31 
                   1.39187594e−26 
                   3.08809486e−28 
               
               
                 C75 
                 −1.90762176e−31 
                   2.23223868e−26 
                   2.68993428e−28 
               
               
                 C77 
                 −3.53653344e−32 
                   6.58181727e−27 
                 −2.56565757e−28 
               
               
                 C78 
                 −1.28401944e−34 
                   4.22239739e−31  
                  −5.6263208e−30 
               
               
                 C80 
                 −8.00611222e−34 
                    1.4969115e−30  
                 −3.65636379e−29 
               
               
                 C82 
                 −2.08044469e−33 
                   9.27586881e−31 
                 −2.82097568e−29 
               
               
                 C84 
                 −2.99812506e−33 
                 −2.81205697e−29  
                   1.23362854e−30 
               
               
                 C86 
                 −2.44765003e−33 
                 −5.59224504e−29  
                   3.32486225e−31 
               
               
                 C88 
                 −1.08671322e−33 
                 −1.78093061e−29  
                    1.1699384e−30 
               
               
                 C90 
                 −2.11573397e−34  
                   5.14032892e−29 
                 −5.63928364e−31 
               
               
                 C92 
                   3.23220481e−38 
                 −2.38769667e−33 
                 −5.74687656e−32 
               
               
                 C94 
                   3.21925323e−37 
                 −3.11471422e−33 
                 −1.32786862e−31 
               
               
                 C96 
                   7.57126123e−37 
                 −6.66791486e−32 
                 −4.22660394e−32 
               
               
                 C98 
                   9.69365768e−37 
                   −2.934094e−31 
                   9.32991054e−34 
               
               
                 C100 
                   7.04923179e−37 
                 −6.52696174e−31 
                 −6.22093735e−33 
               
               
                 C102 
                   2.62042917e−37 
                 −1.04820586e−30  
                   2.08603643e−33 
               
               
                 C104 
                   4.07988929e−38 
                  −7.5774402e−31 
                 −7.31578585e−34 
               
               
                 C105 
                   1.66061587e−40 
                 −4.99206036e−37  
                   8.05574038e−35 
               
               
                 C107 
                   1.25271974e−39 
                   5.59249922e−36 
                   6.75124517e−34 
               
               
                 C109 
                   4.10714369e−39 
                    6.2048029e−35 
                    7.7682584e−34 
               
               
                 C111 
                   7.47611007e−39 
                   6.35194423e−34 
                 −4.50825615e−36 
               
               
                 C113 
                   8.28548592e−39 
                   2.16520675e−33 
                 −3.39262679e−35 
               
               
                 C115 
                    5.5390038e−39 
                   3.67754227e−33 
                 −1.22938875e−35 
               
               
                 C117 
                   2.08161823e−39 
                   4.05364531e−33 
                   1.44193642e−36 
               
               
                 C119 
                   3.61466995e−40 
                   2.14759918e−33 
                 −4.15418675e−37 
               
               
                 C121 
                   −1.7470143e−43 
                 0 
                 0 
               
               
                 C123 
                 −1.24194664e−42 
                 0 
                 0 
               
               
                 C125 
                 −3.89205838e−42 
                 0 
                 0 
               
               
                 C127 
                 −6.57194445e−42 
                 0 
                 0 
               
               
                 C129 
                 −6.52993268e−42 
                 0 
                 0 
               
               
                 C131 
                 −3.87022353e−42 
                 0 
                 0 
               
               
                 C133 
                 −1.24875231e−42 
                 0 
                 0 
               
               
                 C135 
                 −1.70148907e−43 
                 0 
                 0 
               
               
                 C136 
                 −3.91176552e−46 
                 0 
                 0 
               
               
                 C138 
                 −3.37053804e−45 
                 0 
                 0 
               
               
                 C140 
                 −1.30298939e−44 
                 0 
                 0 
               
               
                 C142 
                 −2.82508364e−44 
                 0 
                 0 
               
               
                 C144 
                 −3.81978621e−44 
                 0 
                 0 
               
               
                 C146 
                 −3.31582016e−44 
                 0 
                 0 
               
               
                 C148 
                 −1.79377138e−44 
                 0 
                 0 
               
               
                 C150 
                 −5.55598461e−45 
                 0 
                 0 
               
               
                 C152 
                 −7.76672874e−46 
                 0 
                 0 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 3b for FIG. 16/17 
               
               
                   
               
               
                 Coefficient 
                 M5 
                 M4 
                 M3 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 KY 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 KX 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 RX 
                 7333.37887600  
                 −2343.60828700 
                 −8176.83666000 
               
               
                 C7 
                 −8.06007218e−08 
                 −3.48950166e−08 
                   4.05927788e−09 
               
               
                 C9 
                 −2.08509486e−07 
                   8.94289204e−08 
                   1.77611145e−08 
               
               
                 C10 
                   4.87512053e−11 
                 −3.68853182e−12 
                 −2.10548784e−12 
               
               
                 C12 
                   6.98533228e−11 
                 −1.68926357e−12 
                 −1.81838078e−11 
               
               
                 C14 
                   7.56830797e−10 
                 −7.16019789e−10 
                 −1.28620718e−11 
               
               
                 C16 
                 −4.21056731e−14 
                 −9.71341862e−15 
                   1.51233551e−14 
               
               
                 C18 
                   2.16257556e−13 
                    1.0109964e−13 
                   2.12796111e−14 
               
               
                 C20 
                 −2.45524747e−12 
                   2.43722256e−12 
                   1.97634161e−14 
               
               
                 C21 
                 −1.00355924e−16 
                   1.46336047e−18 
                 −3.64595782e−17 
               
               
                 C23 
                 −8.60207099e−17 
                 −7.86037179e−18 
                 −1.04353271e−17 
               
               
                 C25 
                 −1.04377426e−15 
                 −4.99679238e−16 
                 −4.48160081e−17 
               
               
                 C27 
                   9.80765672e−15 
                  −7.9361522e−15  
                  −2.3137161e−17 
               
               
                 C29 
                   5.00768352e−20 
                 −1.44519643e−20 
                  −1.3579059e−21 
               
               
                 C31 
                 −4.94223102e−19 
                   3.37633547e−20 
                   5.80350123e−20 
               
               
                 C33 
                   7.13421062e−18 
                   8.97303449e−19  
                   6.79018066e−20 
               
               
                 C35 
                 −4.57055281e−17 
                 −2.14705684e−16 
                   3.32978205e−20 
               
               
                 C36 
                   6.29537322e−22 
                 −5.41983346e−24 
                   2.94852673e−22 
               
               
                 C38 
                   4.56244955e−21 
                   8.73176771e−25  
                   2.28099588e−23 
               
               
                 C40 
                 −5.65666291e−22 
                 −4.49558052e−21 
                 −7.30396947e−23 
               
               
                 C42 
                 −1.97093015e−20 
                 −5.08595618e−19 
                 −7.04354696e−23 
               
               
                 C44 
                   2.25870745e−19 
                 −1.86162624e−18 
                 −6.57401088e−23 
               
               
                 C46 
                 −4.76975597e−25 
                   3.18692569e−26  
                 −5.31469542e−25 
               
               
                 C48 
                 −2.62153771e−23 
                   7.33616878e−26  
                 −1.56666314e−25 
               
               
                 C50 
                 −8.35149543e−23 
                  −3.1998671e−22 
                   1.17242589e−25 
               
               
                 C52 
                   2.06972807e−22 
                   1.67741969e−22  
                   4.56588177e−25 
               
               
                 C54 
                 −8.42020489e−22 
                   1.29228647e−19  
                   1.50592072e−25 
               
               
                 C55 
                 −8.54723421e−27 
                   3.09703897e−29 
                 −2.51969622e−27 
               
               
                 C57 
                 −2.15095808e−26 
                 −1.45976138e−27 
                   1.12593984e−27 
               
               
                 C59 
                   2.73391474e−25 
                 −7.44808008e−26 
                 −6.80649268e−28 
               
               
                 C61 
                   5.18559089e−25 
                   3.81005555e−24 
                 −3.08355376e−27 
               
               
                 C63 
                 −2.47889841e−24 
                   3.09020753e−22  
                 −1.76838539e−27 
               
               
                 C65 
                   5.34614791e−25 
                   1.92266397e−21  
                 −1.90865204e−29 
               
               
                 C67 
                 −2.25910931e−30 
                 −4.54679793e−31 
                   4.05531645e−30 
               
               
                 C69 
                   1.74490344e−28 
                 −3.06527261e−29 
                   5.09507467e−30 
               
               
                 C71 
                 −9.47792011e−28 
                   3.40412751e−27  
                   1.35919614e−29 
               
               
                 C73 
                 −1.28041726e−27 
                   2.17008338e−25  
                   1.12809097e−29 
               
               
                 C75 
                   1.16717661e−26 
                   5.05227073e−24 
                   1.33613049e−31 
               
               
                 C77 
                   2.41916614e−26 
                   1.23707257e−24  
                   2.90705483e−31 
               
               
                 C78 
                   4.99191675e−32 
                 −2.63305732e−35  
                    6.4801327e−33 
               
               
                 C80 
                   2.40587164e−31 
                   5.98530383e−33 
                 −2.08464487e−32 
               
               
                 C82 
                 −1.49661977e−30 
                   9.35640119e−31 
                 −4.42072324e−32 
               
               
                 C84 
                 −5.16969383e−30 
                   7.40737374e−29  
                 −3.85234173e−32 
               
               
                 C86 
                   2.80547586e−29 
                   2.36087579e−27 
                 −8.47384767e−34 
               
               
                 C88 
                 −5.66097673e−29 
                   3.80301606e−26 
                    1.2873158e−33 
               
               
                 C90 
                 −1.65077574e−28 
                 −1.84363909e−25 
                 −2.11409931e−33 
               
               
                 C92 
                 −9.95571829e−35 
                   1.28242738e−36  
                 −2.84775083e−36 
               
               
                 C94 
                 −2.55937997e−33 
                   3.19723428e−34 
                   6.69265283e−35 
               
               
                 C96 
                   1.72531216e−32 
                   1.04943712e−32  
                   9.69063033e−35 
               
               
                 C98 
                   1.30347826e−32 
                   3.93847703e−31 
                   5.84595971e−36 
               
               
                 C100 
                 −1.82235259e−31 
                   1.39933265e−29  
                 −2.43085728e−35 
               
               
                 C102 
                   3.33993384e−31  
                  1.0462556e−28  
                   1.45322044e−35 
               
               
                 C104 
                   3.61923001e−31 
                 −1.37953609e−27 
                   2.87194159e−37 
               
               
                 C105 
                 −9.27081346e−38 
                 −3.28332618e−41 
                 −3.88255253e−39 
               
               
                 C107 
                   5.90554811e−37 
                   1.77805509e−38  
                 −1.21407691e−39 
               
               
                 C109 
                   5.75559924e−36 
                    1.9649268e−36  
                 −7.40697936e−38 
               
               
                 C111 
                 −6.21170396e−35 
                 −1.27239557e−35 
                 −7.22725357e−38 
               
               
                 C113 
                   1.18750818e−34 
                   1.69960241e−33 
                   8.51832143e−38 
               
               
                 C115 
                    1.0492163e−34 
                   2.21579419e−32 
                 −3.56423101e−38 
               
               
                 C117 
                 −4.95984269e−34 
                   6.99631983e−32 
                   1.79158311e−39 
               
               
                 C119 
                  −2.2869355e−34 
                 −3.11861224e−30 
                 −3.49739868e−40 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
             
               
               
               
             
           
               
                 TABLE 3c for FIG. 16/17 
               
               
                   
               
               
                 Coefficient 
                 M2 
                 M1 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 KY 
                 0.00000000 
                 0.00000000 
               
               
                 KX 
                 0.00000000 
                 0.00000000 
               
               
                 RX 
                 −2347.82421000 
                 7536.03761800 
               
               
                 C7 
                 −7.03485497e−08 
                 −1.86250955e−07 
               
               
                 C9 
                   9.59401595e−09 
                 −5.82539372e−08 
               
               
                 C10 
                 −8.37768666e−11 
                 −2.02011333e−11 
               
               
                 C12 
                   −2.254116e−10 
                   5.08465307e−11 
               
               
                 C14 
                   1.12290556e−11 
                 −1.50961208e−11 
               
               
                 C16 
                   1.29016905e−13 
                 −1.19111437e−13 
               
               
                 C18 
                   1.01010377e−13 
                 −2.20807707e−13 
               
               
                 C20 
                    5.5795716e−14  
                 −4.18443714e−14 
               
               
                 C21 
                 −8.62874665e−17 
                   1.04483703e−16 
               
               
                 C23 
                 −2.60494693e−16 
                   4.60051315e−17 
               
               
                 C25 
                 −4.92392033e−17  
                   −1.435823e−16 
               
               
                 C27 
                   1.25996639e−16 
                 −6.05169215e−18 
               
               
                 C29 
                   6.11488553e−19 
                   7.87050699e−19 
               
               
                 C31 
                   4.24373257e−19 
                   1.12622911e−19 
               
               
                 C33 
                   2.22031302e−19 
                   2.89213141e−19 
               
               
                 C35 
                   1.26284752e−19 
                   2.81920022e−19 
               
               
                 C36 
                 −1.33244714e−21 
                 −1.46603103e−21 
               
               
                 C38 
                 −6.52230969e−22 
                 −6.37096287e−21 
               
               
                 C40 
                 −1.36827685e−21 
                 −1.09951069e−21 
               
               
                 C42 
                 −1.19387383e−21 
                 −2.71718561e−21 
               
               
                 C44 
                    4.6650984e−23 
                   8.53547123e−23 
               
               
                 C46 
                 −9.78213588e−24 
                  −3.184402e−23 
               
               
                 C48 
                    2.1349715e−24  
                 −4.73107403e−23 
               
               
                 C50 
                   2.30513651e−24 
                 −8.85417497e−23 
               
               
                 C52 
                 −1.30422404e−24 
                 −2.08672516e−23 
               
               
                 C54 
                   2.56099182e−24 
                 −1.11997994e−23 
               
               
                 C55 
                 −2.01832009e−27 
                   6.22382668e−26 
               
               
                 C57 
                 −2.09810378e−26 
                   3.74797998e−25 
               
               
                 C59 
                   4.07233629e−29  
                   5.10816825e−26 
               
               
                 C61 
                    3.6325349e−26  
                 −9.00558717e−26 
               
               
                 C63 
                   1.56403725e−26  
                   1.07987651e−25 
               
               
                 C65 
                   8.21661731e−27  
                   5.68528189e−26 
               
               
                 C67 
                   7.63814345e−29  
                   7.63520422e−28 
               
               
                 C69 
                   5.02221412e−30  
                    1.3232798e−27 
               
               
                 C71 
                   1.77729214e−29  
                   5.33156044e−27 
               
               
                 C73 
                   2.79158365e−29 
                   4.63514451e−27 
               
               
                 C75 
                   2.53015945e−29 
                   1.30513775e−27 
               
               
                 C77 
                  −1.4759564e−29 
                    3.5264471e−28 
               
               
                 C78 
                   3.46417745e−32 
                 −5.78316004e−31 
               
               
                 C80 
                   1.45159699e−31 
                 −1.10067449e−29 
               
               
                 C82 
                    9.0694834e−32 
                 −1.42216857e−31 
               
               
                 C84 
                 −6.89700486e−31 
                   1.16109131e−29 
               
               
                 C86 
                 −7.49364228e−31 
                   1.17727865e−29 
               
               
                 C88 
                  −1.7339254e−31  
                 −2.80482217e−30 
               
               
                 C90 
                 −4.47739797e−32 
                 −2.81074177e−30 
               
               
                 C92 
                 −1.81662263e−34 
                 −6.13529779e−33 
               
               
                 C94 
                   1.28959854e−34 
                 −4.08542518e−33 
               
               
                 C96 
                   4.86782417e−35 
                 −7.56607259e−32 
               
               
                 C98 
                   4.67335248e−35 
                 −1.27523429e−31 
               
               
                 C100 
                     6.049461e−34 
                 −8.28428683e−32 
               
               
                 C102 
                   1.19416219e−34  
                 −1.88207341e−32 
               
               
                 C104 
                   2.22522278e−34  
                 −5.85049322e−33 
               
               
                 C105 
                 −1.53243521e−37 
                 −5.49967483e−36 
               
               
                 C107 
                 −6.52477544e−37 
                   1.45163725e−34 
               
               
                 C109 
                 −1.61717488e−36 
                   8.41098542e−36 
               
               
                 C111 
                    3.3725318e−36 
                  −2.0054224e−34 
               
               
                 C113 
                   8.27472276e−36 
                 −4.23023623e−34 
               
               
                 C115 
                   6.99221137e−36 
                 −2.55382174e−34 
               
               
                 C117 
                   1.36584295e−36 
                   2.10184113e−36 
               
               
                 C119 
                   5.55470158e−37 
                   3.89090885e−35 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 4a for FIG. 16/17 
               
               
                   
               
               
                 Surface 
                 DCX 
                 DCY 
                 DCZ 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 Image plane 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 M8 
                 0.00000000 
                 0.00000000 
                 784.93663307 
               
               
                 M7 
                 0.00000000 
                 −179.68746470 
                 105.44220179 
               
               
                 M6 
                 0.00000000 
                 55.20438485 
                 1396.55879809 
               
               
                 M5 
                 0.00000000 
                 268.65063753 
                 1738.35972839 
               
               
                 M4 
                 0.00000000 
                 722.06496295 
                 2007.61241376 
               
               
                 M3 
                 −0.00000000 
                 −674.41946224 
                 1630.11468301 
               
               
                 M2 
                 −0.00000000 
                 −1315.57939299 
                 1157.79929585 
               
               
                 Stop 
                 −0.00000000 
                 −1561.97639547 
                 784.10794177 
               
               
                 M1 
                 −0.00000000 
                 −1988.27617201 
                 137.57190792 
               
               
                 Object plane 
                 −0.00000000 
                 −2017.39023229 
                 1874.54221542 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 4b for FIG. 16/17 
               
               
                   
               
               
                 Surface 
                 TLA[deg] 
                 TLB[deg] 
                 TLC[deg] 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 Image plane 
                 −0.00000000 
                 0.00000000 
                 −0.00000000 
               
               
                 M8 
                 −7.40619844 
                 0.00000000 
                 −0.00000000 
               
               
                 M7 
                 167.43829886 
                 −0.00000000 
                 −0.00000000 
               
               
                 M6 
                 68.85261659 
                 0.00000000 
                 −0.00000000 
               
               
                 M5 
                 44.35975235 
                 0.00000000 
                 −0.00000000 
               
               
                 M4 
                 −67.08503447 
                 0.00000000 
                 −0.00000000 
               
               
                 M3 
                 25.75208383 
                 −0.00000000 
                 −0.00000000 
               
               
                 M2 
                 46.48912783 
                 −0.00000000 
                 0.00000000 
               
               
                 Stop 
                 −33.39924707 
                 180.00000000 
                 0.00000000 
               
               
                 M1 
                 163.78051035 
                 0.00000000 
                 −0.00000000 
               
               
                 Object plane 
                 −5.37252548 
                 −0.00000000 
                 0.00000000 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 5 for FIG. 16/17 
               
               
                   
               
               
                   
                 Surface 
                 Angle of incidence [deg] 
                 Reflectivity 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                   
                 M8 
                 7.40619844 
                 0.65984327 
               
               
                   
                 M7 
                 2.25069574 
                 0.66521806 
               
               
                   
                 M6 
                 79.16362199 
                 0.86711124 
               
               
                   
                 M5 
                 76.34351377 
                 0.82589579 
               
               
                   
                 M4 
                 7.78830058 
                 0.65919310 
               
               
                   
                 M3 
                 79.37458111 
                 0.86997104 
               
               
                   
                 M2 
                 79.88837490 
                 0.87682901 
               
               
                   
                 M1 
                 17.17975742 
                 0.62938643 
               
               
                   
                 Overall transmission 
                   
                 0.0995 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
             
               
               
               
             
           
               
                 TABLE 6 for FIG. 16/17 
               
               
                   
               
               
                 X[mm] 
                 Y[mm] 
                 Z[mm] 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 0.00000000 
                 −64.68191562 
                 0.00000000 
               
               
                 33.53875145 
                 −63.83359071 
                 0.00000000 
               
               
                 66.38499140 
                 −61.30381759 
                 0.00000000 
               
               
                 97.85010336 
                 −57.13847210 
                 0.00000000 
               
               
                 127.25390981 
                 −51.41487055 
                 0.00000000 
               
               
                 153.93066205 
                 −44.24293063 
                 0.00000000 
               
               
                 177.23821823 
                 −35.76660175 
                 0.00000000 
               
               
                 196.57137775 
                 −26.16552395 
                 0.00000000 
               
               
                 211.37968084 
                 −15.65654763 
                 0.00000000 
               
               
                 221.18976357 
                 −4.49338596 
                 0.00000000 
               
               
                 225.63064082 
                 7.03803149 
                 0.00000000 
               
               
                 224.45920695 
                 18.62872113 
                 0.00000000 
               
               
                 217.58261451 
                 29.96013697 
                 0.00000000 
               
               
                 205.07441971 
                 40.72010810 
                 0.00000000 
               
               
                 187.18211570 
                 50.61868899 
                 0.00000000 
               
               
                 164.32450058 
                 59.40103368 
                 0.00000000 
               
               
                 137.07897670 
                 66.85526038 
                 0.00000000 
               
               
                 106.16044703 
                 72.81504783 
                 0.00000000 
               
               
                 72.39462700 
                 77.15696291 
                 0.00000000 
               
               
                 36.68840284 
                 79.79582533 
                 0.00000000 
               
               
                 0.00000000 
                 80.68107104 
                 0.00000000 
               
               
                 −36.68840284 
                 79.79582533 
                 0.00000000 
               
               
                 −72.39462700 
                 77.15696291 
                 0.00000000 
               
               
                 −106.16044703 
                 72.81504783 
                 0.00000000 
               
               
                 −137.07897670 
                 66.85526038 
                 0.00000000 
               
               
                 −164.32450058 
                 59.40103368 
                 0.00000000 
               
               
                 −187.18211570 
                 50.61868899 
                 0.00000000 
               
               
                 −205.07441971 
                 40.72010810 
                 0.00000000 
               
               
                 −217.58261451 
                 29.96013697 
                 0.00000000 
               
               
                 −224.45920695 
                 18.62872113 
                 0.00000000 
               
               
                 −225.63064082 
                 7.03803149 
                 0.00000000 
               
               
                 −221.18976357 
                 −4.49338596 
                 0.00000000 
               
               
                 −211.37968084 
                 −15.65654763 
                 0.00000000 
               
               
                 −196.57137775 
                 −26.16552395 
                 0.00000000 
               
               
                 −177.23821823 
                 −35.76660175 
                 0.00000000 
               
               
                 −153.93066205 
                 −44.24293063 
                 0.00000000 
               
               
                 −127.25390981 
                 −51.41487055 
                 0.00000000 
               
               
                 −97.85010336 
                 −57.13847210 
                 0.00000000 
               
               
                 −66.38499140 
                 −61.30381759 
                 0.00000000 
               
               
                 −33.53875145 
                 −63.83359071 
                 0.00000000 
               
               
                   
               
             
          
         
       
     
         [0308]    An overall reflectivity of the projection optical unit  32  is 9.95%. 
         [0309]    The projection optical unit  32  has an image-side numerical aperture of 0.63. The image field  8  has an x-extent of two times 6.5 mm and a y-extent of 1.20 mm. The projection optical unit  32  is optimized for an operating wavelength of the illumination light  3  of 13.5 nm. 
         [0310]    The projection optical unit  32  has exactly eight mirrors M 1  to M 8 . The mirrors M 2  and M 3  on the one hand, and M 5 , M 6  on the other hand are embodied as mirrors for grazing incidence and are arranged in each case as a mirror pair directly behind one another in the imaging beam path. The projection optical unit  32  has exactly four mirrors for grazing incidence, namely the mirrors M 2 , M 3 , M 5  and M 6 . The mirrors M 1 , M 4 , M 7  and M 8  are embodied as mirrors for normal incidence. 
         [0311]    In the projection optical unit  32 , a stop  18  is arranged in the beam path between the mirrors M 1  and M 2 , near the grazing incidence on the mirror M 2 . Alternatively or additionally, a stop can be arranged directly on the surface of the mirror M 2 . 
         [0312]    The projection optical unit  32  has a reducing imaging scale β=8.00. 
         [0313]    An angle of incidence of the chief rays  16  in the object plane  5  is 6.3°. 
         [0314]    In the projection optical unit  32 , the entrance pupil lies downstream of the object field  4  in the imaging beam path, both in the xz-plane and in the yz-plane. An extent of the chief rays  16  emanating from the object field  4  is therefore convergent both in the meridional section according to  FIG. 16  and in the view according to  FIG. 17 . 
         [0315]    In the xz-section (cf.  FIG. 17 ), the stop  18  can lie at a position displaced in the z-direction compared to its position in the yz-section. 
         [0316]    A z-distance between the object field  4  and the image field  8  is approximately 1680 mm. 
         [0317]    An object/image offset (d OIS ) is approximately 2180 mm. 
         [0318]    A free working distance between the mirror M 7  and the image field  8  is 66 mm. 
         [0319]    In the projection optical unit  32 , a scanned RMS value for the wavefront aberration is at most 10 mλ and, on average, 10 mλ. 
         [0320]    A maximum distortion value is at most 0.05 nm in the x-direction and at most 0.05 nm in the y-direction. A telecentricity value in the x-direction is at most 0.56 mrad on the image field-side and a telecentricity value in the y-direction is at most 0.90 mrad on the image field-side. 
         [0321]    Further mirror data emerge from the following table. 
         [0000]    
       
         
               
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
               
             
           
               
                   
                 TABLE 7 for FIG. 16 
               
               
                   
                   
               
               
                   
                 M1 
                 M2 
                 M3 
                 M4 
                 M5 
                 M6 
                 M7 
                 M8 
               
               
                   
                   
               
             
             
               
                   
               
             
          
           
               
                 Maximum angle of incidence [deg] 
                 17.7 
                 83.2 
                 80.6 
                 9.6 
                 79.6 
                 83.6 
                 20.1 
                 9.0 
               
               
                 Mirror extent (x) [mm] 
                 303.5 
                 566.4 
                 758.8 
                 892.8 
                 684.3 
                 320.4 
                 428.8 
                 1036.2 
               
               
                 Mirror extent (y) [mm] 
                 297.5 
                 442.9 
                 668.0 
                 123.3 
                 268.7 
                 464.1 
                 277.5 
                 1030.7 
               
               
                 Maximum mirror diameter [mm] 
                 307.4 
                 566.5 
                 882.6 
                 892.8 
                 684.4 
                 465.6 
                 429.0 
                 1042.4 
               
               
                   
               
             
          
         
       
     
         [0322]    There is an intermediate image  19  in the beam path in the region of a reflection on the mirror M 5  in the yz-plane ( FIG. 16 ) and in the imaging beam path region between the mirrors M 6  and M 7  in the xz-plane ( FIG. 17 ). 
         [0323]    The mirror M 8  is obscured and includes a passage opening  17  for the passage of the illumination light  3  in the imaging beam path between the mirrors M 6  and M 7 . 
         [0324]    Only the last mirror M 8  in the imaging beam path includes a passage opening  17  for the imaging light  3 . All other mirrors M 1  to M 7  have a continuous reflection surface. The reflection surface of the mirror M 8  is used around the passage opening  17  thereof. 
         [0325]    The mirrors M 1 , M 3 , M 4  and M 8  have negative values for the radius, i.e. are, in principle, concave mirrors. The other mirrors M 2 , M 5 , M 6  and M 7  have positive values for the radius, i.e. are, in principle, convex mirrors. The mirrors M 2 , M 3 , M 5  and M 6  for grazing incidence have very large radii and only constitute small deviations from plane reflection surfaces. 
         [0326]    A further embodiment of a projection optical unit  33 , which can be used in the projection exposure apparatus  1  according to  FIG. 1  instead of e.g. the projection optical unit  7 , is explained in the following text on the basis of  FIGS. 18 and 19 . Components and functions which were already explained above in the context of  FIGS. 1 to 17  are appropriately denoted by the same reference signs and are not discussed again in detail.  FIG. 18  shows a meridional section of the projection optical unit  33 .  FIG. 19  shows a sagittal view of the projection optical unit  33 . 
         [0327]    The projection optical unit  33  has a total of 8 mirrors M 1  to M 8  and, in terms of the basic design thereof, it is similar to e.g. the projection optical unit  7  according to  FIG. 2 . 
         [0328]    The mirrors M 1  to M 8  are once again embodied as free-form surface mirrors, for which the free-form surface equation (1), specified above, applies. The optical design data from the projection optical unit  33  can be gathered from the following tables, which, in terms of their design, correspond to the tables for the projection optical unit  7  according to  FIG. 2 . 
         [0000]    
       
         
               
               
               
             
               
               
               
               
             
               
               
               
             
           
               
                 TABLE 1 for FIG. 18/19 
               
               
                   
               
               
                   
                 Exemplary embodiment 
                 FIG. 18/19 
               
               
                   
               
             
             
               
                   
                 NA 
                 0.55 
               
             
          
           
               
                   
                 Wavelength 
                 13.5 
                 nm 
               
               
                   
                 Field dimension x 
                 13.0 
                 mm 
               
               
                   
                 Field dimension y 
                 1.2 
                 mm 
               
               
                   
                 Field curvature 
                 0.0 
                 1/mm 
               
             
          
           
               
                   
                 Stop 
                 S9 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
               
               
             
               
               
               
               
               
               
             
           
               
                 TABLE 2 for FIG. 18/19 
               
               
                   
               
               
                 Surface 
                 Radius x[mm] 
                 Power x[1/mm] 
                 Radius y[mm] 
                 Power y[1/mm] 
                 Operating 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 M8 
                 −670.35797232 
                 0.00296240 
                 −627.58435329 
                 0.00320950 
                 REFL 
               
               
                 M7 
                 1745.55712015 
                 −0.00114571 
                 412.50033390 
                 −0.00484870 
                 REFL 
               
               
                 M6 
                 4421.01009198 
                 −0.00008931 
                 7185.41512590 
                 −0.00140985 
                 REFL 
               
               
                 M5 
                 15855.02373559 
                 −0.00002796 
                 4171.22179090 
                 −0.00216291 
                 REFL 
               
               
                 M4 
                 −1741.78725861 
                 0.00114424 
                 −1057.57554686 
                 0.00189775 
                 REFL 
               
               
                 M3 
                 −9485.62754332 
                 0.00002417 
                 — 
                 0.00014374 
                 REFL 
               
               
                 M2 
                 −2182.91143597 
                 0.00019422 
                 5519.10498181 
                 −0.00170943 
                 REFL 
               
               
                 M1 
                 15030.83113395 
                 −0.00012472 
                 −1265.49778066 
                 0.00168608 
                 REFL 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 3a for FIG. 18/19 
               
               
                   
               
               
                 Coefficient 
                 M8 
                 M7 
                 M6 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 KY 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 KX 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 RX 
                 −670.35797230 
                 1745.55712000  
                 4421.01009200 
               
               
                 C7 
                 −4.81288458e−08 
                 −3.55811479e−08 
                   1.10191288e−07 
               
               
                 C9 
                 −1.43025013e−08 
                 −2.65021944e−08 
                   6.09862305e−08 
               
               
                 C10 
                  −2.9090628e−11 
                   2.00521492e−09  
                   4.47450933e−10 
               
               
                 C12 
                 −7.81857726e−11 
                   5.80590938e−09  
                 −4.87603276e−12 
               
               
                 C14 
                 −4.02236114e−11 
                   4.94771956e−09 
                    1.0068161e−10 
               
               
                 C16 
                 −7.43164532e−14 
                 −1.95204523e−12 
                 −2.12453013e−12 
               
               
                 C18 
                 −8.64425143e−14 
                 −5.06245222e−12 
                   7.37281997e−13 
               
               
                 C20 
                 −1.71739056e−14 
                 −1.20800077e−13 
                   3.37980344e−13 
               
               
                 C21 
                  −1.1968188e−16 
                   4.87171182e−15 
                 −1.08375275e−15 
               
               
                 C23 
                 −3.75329564e−16 
                   4.39287253e−14 
                     8.747056e−15 
               
               
                 C25 
                  −3.8109341e−16 
                   1.16541403e−13 
                   2.36512505e−15 
               
               
                 C27 
                 −1.19138037e−16 
                   6.70791361e−14  
                   1.37590246e−15 
               
               
                 C29 
                 −1.04340624e−19  
                    2.0215171e−17  
                   5.61602094e−18 
               
               
                 C31 
                 −2.79317699e−19 
                   4.75537085e−17 
                 −1.60443831e−17 
               
               
                 C33 
                 −1.86065365e−19 
                  −1.1064442e−16 
                   1.42151097e−17 
               
               
                 C35 
                 −2.70598188e−20 
                 −1.50020521e−17 
                   6.37515084e−18 
               
               
                 C36 
                 −2.60850039e−22 
                   5.08968358e−20 
                 −2.32816563e−20 
               
               
                 C38 
                 −1.30441247e−21 
                    4.6799942e−19  
                 −4.47727577e−20 
               
               
                 C40 
                 −1.96796788e−21 
                   1.10597229e−18 
                   5.12611591e−20 
               
               
                 C42 
                  −1.2977623e−21 
                   1.89364881e−18  
                   7.02851213e−20 
               
               
                 C44 
                 −3.09054832e−22 
                   9.05751028e−19  
                   2.94917341e−20 
               
               
                 C46 
                 −3.15590698e−25 
                 −2.08971584e−22 
                   1.62115204e−22 
               
               
                 C48 
                 −6.69894425e−25 
                    1.9553723e−22 
                 −2.33180972e−22 
               
               
                 C50 
                 −9.10706455e−25 
                   9.99600993e−22 
                 −1.77260159e−22 
               
               
                 C52 
                 −4.09789778e−25 
                   8.73317101e−22 
                   3.10774876e−22 
               
               
                 C54 
                 −5.39704308e−26  
                   1.78769324e−21 
                   1.12292429e−22 
               
               
                 C55 
                 −6.93874331e−28 
                 −5.67024671e−26 
                   9.56176548e−25 
               
               
                 C57 
                 −3.23605914e−27 
                   2.18766705e−26  
                   3.05575248e−24 
               
               
                 C59 
                 −7.20445617e−27 
                   6.74742059e−24  
                   4.95411355e−24 
               
               
                 C61 
                 −7.31071717e−27 
                    1.7636561e−23 
                   8.45206669e−25 
               
               
                 C63 
                 −3.76538565e−27 
                   4.45369389e−23 
                    7.568151e−25 
               
               
                 C65 
                 −8.10033369e−28 
                   4.74178513e−23 
                   2.96782466e−25 
               
               
                 C67 
                 −3.52005901e−31 
                   3.12504796e−27 
                   3.10279996e−27 
               
               
                 C69 
                 −2.88238592e−30 
                 −1.30629101e−27 
                   2.16886937e−26 
               
               
                 C71 
                 −4.82651049e−30 
                 −6.24964383e−26 
                   6.07431187e−27 
               
               
                 C73 
                 −3.68260801e−30 
                 −4.92689158e−26 
                 −2.84115615e−27 
               
               
                 C75 
                  −1.0653794e−30  
                  −5.7005461e−26  
                   7.30804157e−28 
               
               
                 C77 
                   5.47094621e−32 
                 −8.75138214e−26  
                    4.6058713e−28 
               
               
                 C78 
                 −2.14791056e−33 
                   9.06722616e−30  
                  −1.033614e−29 
               
               
                 C80 
                 −1.60510489e−32 
                   1.35117848e−28 
                 −1.70589275e−28 
               
               
                 C82 
                 −3.93788896e−32 
                   5.55787384e−28 
                 −2.81428982e−28 
               
               
                 C84 
                 −5.49581485e−32 
                   1.47508315e−27 
                 −1.13602715e−28 
               
               
                 C86 
                 −4.35705736e−32 
                   1.78392254e−27 
                 −4.04142212e−30 
               
               
                 C88 
                 −1.75652936e−32 
                    7.3734889e−28  
                   9.12651931e−32 
               
               
                 C90 
                 −2.46762348e−33 
                 −8.31242313e−28 
                   3.00200174e−31 
               
               
                 C92 
                 −3.88333351e−37 
                 0 
                 0 
               
               
                 C94 
                 −2.23671833e−37 
                 0 
                 0 
               
               
                 C96 
                 −2.43165031e−36 
                 0 
                 0 
               
               
                 C98 
                 −2.13457216e−36 
                 0 
                 0 
               
               
                 C100 
                 −9.67295232e−37 
                 0 
                 0 
               
               
                 C102 
                  −1.1876732e−36 
                 0 
                 0 
               
               
                 C104 
                 −1.14382449e−36 
                 0 
                 0 
               
               
                 C105 
                   1.53654914e−39 
                 0 
                 0 
               
               
                 C107 
                   1.69206394e−38 
                 0 
                 0 
               
               
                 C109 
                   3.52182989e−38 
                 0 
                 0 
               
               
                 C111 
                   6.26135172e−38 
                 0 
                 0 
               
               
                 C113 
                   8.30656407e−38 
                 0 
                 0 
               
               
                 C115 
                   6.21596876e−38 
                 0 
                 0 
               
               
                 C117 
                   1.77571315e−38 
                 0 
                 0 
               
               
                 C119 
                 −5.25174568e−40 
                 0 
                 0 
               
               
                 C121 
                 −7.01031193e−42 
                 0 
                 0 
               
               
                 C123 
                 −4.46476068e−41 
                 0 
                 0 
               
               
                 C125 
                 −1.30369062e−40 
                 0 
                 0 
               
               
                 C127 
                 −2.05416782e−40 
                 0 
                 0 
               
               
                 C129 
                 −1.82756747e−40 
                 0 
                 0 
               
               
                 C131 
                 −8.61446766e−41 
                 0 
                 0 
               
               
                 C133 
                 −1.58867275e−41 
                 0 
                 0 
               
               
                 C135 
                   1.58701316e−42 
                 0 
                 0 
               
               
                 C136 
                 −3.01497099e−44 
                 0 
                 0 
               
               
                 C138 
                 −2.83753936e−43 
                 0 
                 0 
               
               
                 C140 
                 −1.00487157e−42 
                 0 
                 0 
               
               
                 C142 
                 −2.10202761e−42 
                 0 
                 0 
               
               
                 C144 
                  −2.8129687e−42 
                 0 
                 0 
               
               
                 C146  
                 −2.44024498e−42 
                 0 
                 0 
               
               
                 C148  
                 −1.28745661e−42  
                 0 
                 0 
               
               
                 C150  
                 −3.62092429e−43  
                 0 
                 0 
               
               
                 C152  
                 −3.68635908e−44 
                 0 
                 0 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 3b for FIG. 18/19 
               
               
                   
               
               
                 Coefficient 
                 M5 
                 M4 
                 M3 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 KY 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 KX 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 RX 
                 15855.02374000 
                 −1741.78725900  
                 −9485.62754300 
               
               
                 C7 
                 −1.31721076e−07 
                 −4.59832284e−08 
                   3.52848287e−09 
               
               
                 C9 
                 −6.83242366e−08 
                   1.26772922e−07 
                   6.00270333e−09 
               
               
                 C10 
                   1.86511896e−10 
                  −6.7240665e−12 
                 −3.86514933e−11 
               
               
                 C12 
                   1.02645567e−10 
                   1.40642009e−11 
                 −1.04260025e−11 
               
               
                 C14 
                   3.25328748e−10 
                 −1.44116181e−09  
                 −1.39250403e−12 
               
               
                 C16 
                   1.15440436e−13 
                   1.54655389e−14  
                   1.41839307e−13 
               
               
                 C18 
                   9.78984308e−14  
                   4.72881604e−14  
                 −7.16656945e−15 
               
               
                 C20 
                 −4.13371452e−13  
                   6.75771744e−12 
                   5.02664635e−15 
               
               
                 C21 
                 −9.27197923e−16  
                   1.22282675e−17  
                 −3.31198094e−16 
               
               
                 C23 
                 −1.09172383e−15 
                 −1.54608007e−16  
                 −5.35714413e−19 
               
               
                 C25 
                 −3.20953448e−15  
                  −1.0400161e−15  
                 −1.84536642e−17 
               
               
                 C27 
                   5.96725454e−16 
                 −4.25077515e−14 
                   6.21451944e−19 
               
               
                 C29 
                   2.62826512e−18 
                 −1.61888596e−20 
                   1.34420461e−20 
               
               
                 C31 
                   5.55652996e−18 
                   1.56291853e−18  
                   1.40973329e−19 
               
               
                 C33 
                    2.7740609e−17 
                   2.95936057e−18  
                 −4.11709921e−20 
               
               
                 C35 
                   4.55586057e−18 
                 −1.37954952e−15 
                   2.58219786e−20 
               
               
                 C36 
                 −2.54645948e−21  
                   4.64220138e−23 
                 −1.02171124e−21 
               
               
                 C38 
                   2.59467077e−21 
                   2.40346499e−22  
                   1.13743233e−22 
               
               
                 C40 
                 −2.63246351e−20 
                    2.2463419e−20 
                   2.11256444e−22 
               
               
                 C42 
                 −1.44139765e−19 
                   2.97984423e−19 
                 −1.29143298e−22 
               
               
                 C44 
                 −1.47693917e−20 
                 −9.36301568e−17 
                   3.98789946e−23 
               
               
                 C46 
                   3.92320225e−23 
                 −1.29229238e−25 
                   3.09631337e−25 
               
               
                 C48 
                   6.16075361e−23 
                   2.86131689e−24 
                  −8.082018e−25 
               
               
                 C50 
                 −1.29691393e−22 
                   4.15685135e−22 
                   2.98588259e−25 
               
               
                 C52 
                   6.01647413e−22  
                   2.59285728e−20  
                 −1.63194404e−25 
               
               
                 C54 
                 −2.80843932e−22 
                 −2.64870198e−18  
                 −5.22760512e−25 
               
               
                 C55 
                 −1.90991039e−26 
                   7.33311088e−29  
                 −2.91457225e−28 
               
               
                 C57 
                 −4.94174349e−25 
                 −3.38477536e−27 
                 −6.65349621e−28 
               
               
                 C59 
                 −2.34601421e−25 
                 −6.27781517e−25 
                   6.27762913e−27 
               
               
                 C61 
                   1.83858604e−24  
                   1.36415701e−23  
                 −3.36674024e−27 
               
               
                 C63 
                 −2.23642007e−24 
                   3.28284286e−22  
                   5.96549035e−27 
               
               
                 C65 
                   3.66468868e−24 
                 −4.01324036e−20 
                 −1.49374281e−27 
               
               
                 C67 
                   2.66992017e−28 
                 −5.84759414e−31 
                   7.70928561e−30 
               
               
                 C69 
                   2.07117026e−27 
                 −1.72399089e−28  
                 −1.27896735e−29 
               
               
                 C71 
                  −3.5305907e−28 
                 −5.73139683e−27 
                 −8.13201754e−30 
               
               
                 C73 
                 −7.57480134e−27  
                   1.35355592e−25 
                 −2.66054764e−29 
               
               
                 C75 
                   6.95016816e−27  
                   1.92585784e−24 
                   1.80471214e−29 
               
               
                 C77 
                 −1.70051404e−26 
                 −3.11308211e−22 
                   9.00721038e−31 
               
               
                 C78 
                   4.16730333e−32 
                   4.62818363e−35 
                   6.62810428e−33 
               
               
                 C80 
                 −1.17092721e−30 
                 −1.17159673e−32 
                 −1.00672006e−32 
               
               
                 C82 
                 −1.53899025e−30 
                   4.95758204e−32 
                 −2.55215318e−32 
               
               
                 C84 
                 −3.41614885e−31 
                 −6.16523277e−29  
                   1.34231774e−31 
               
               
                 C86 
                   1.41066094e−29 
                   1.05235757e−27 
                 −6.94396951e−32 
               
               
                 C88 
                 −1.32369475e−29 
                 −2.78941647e−27 
                 −9.85278164e−33 
               
               
                 C90 
                   2.98460269e−29 
                 −9.71953419e−25 
                   2.65172705e−33 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
             
               
               
               
             
           
               
                 TABLE 3c for FIG. 18/19 
               
               
                   
               
               
                 Coefficient 
                 M2 
                 M1 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 KY 
                 0.00000000 
                 0.00000000 
               
               
                 KX 
                 0.00000000 
                 0.00000000 
               
               
                 RX 
                 −2182.91143600 
                 15030.83113000 
               
               
                 C7 
                   4.52959985e−08 
                 −2.95215933e−07 
               
               
                 C9 
                    7.3997303e−09  
                 −1.06249503e−07 
               
               
                 C10 
                 −3.37134993e−10 
                 −1.38418241e−11 
               
               
                 C12 
                 −4.37041985e−10 
                 −2.98703844e−11 
               
               
                 C14 
                 −4.88477799e−12 
                 −3.88213158e−11 
               
               
                 C16 
                   8.58895599e−13 
                 −6.42604386e−13 
               
               
                 C18 
                   6.73225729e−13 
                 −1.25787194e−12 
               
               
                 C20 
                   7.54302364e−14 
                 −1.92589494e−13 
               
               
                 C21 
                 −3.21076173e−16 
                   5.29527426e−16 
               
               
                 C23 
                 −1.19828167e−15 
                 −2.79446453e−16 
               
               
                 C25 
                 −8.61713642e−16 
                 −1.12508948e−15 
               
               
                 C27 
                 −9.46017861e−17 
                 −3.35422436e−16 
               
               
                 C29 
                   6.17495108e−18 
                   7.41744768e−19 
               
               
                 C31 
                   6.43677926e−18 
                 −5.12492497e−19 
               
               
                 C33 
                   3.08530058e−18 
                 −2.24552982e−18 
               
               
                 C35 
                   6.92654359e−20 
                   5.26633314e−20 
               
               
                 C36 
                 −1.39923821e−20 
                 −3.80030801e−21 
               
               
                 C38 
                 −1.75236161e−20 
                 −3.41743066e−21 
               
               
                 C40 
                 −2.44288564e−20 
                   3.36222578e−21 
               
               
                 C42 
                  −7.5084993e−21 
                   1.13386246e−20 
               
               
                 C44 
                   3.60382311e−22 
                 −1.57547758e−21 
               
               
                 C46 
                   8.49074446e−24 
                   7.10295318e−23 
               
               
                 C48 
                   1.29274185e−22 
                   1.77073952e−22 
               
               
                 C50 
                   1.21275303e−22 
                   5.45121326e−23 
               
               
                 C52 
                    2.7448388e−23  
                 −1.80762516e−23 
               
               
                 C54 
                 −2.99667085e−24 
                 −2.67701771e−23 
               
               
                 C55 
                    8.3997029e−26 
                   2.48012197e−25 
               
               
                 C57 
                 −6.89387465e−26 
                   9.08010504e−25 
               
               
                 C59 
                 −1.69030389e−25 
                 −1.40396358e−24 
               
               
                 C61 
                 −1.63503627e−25 
                 −1.98765714e−24 
               
               
                 C63 
                 −4.50856916e−26 
                   6.60490918e−25 
               
               
                 C65 
                 −2.69350712e−26 
                   5.05364735e−25 
               
               
                 C67 
                   1.81339959e−28 
                 −2.43315212e−27 
               
               
                 C69 
                 −1.13047878e−27 
                 −8.88349423e−27 
               
               
                 C71 
                   −2.086832e−27  
                 −1.73693921e−26 
               
               
                 C73 
                 −9.67392348e−28 
                 −1.34931036e−26 
               
               
                 C75 
                 −7.15331766e−31 
                   8.58630418e−27 
               
               
                 C77 
                   2.26098895e−29 
                   7.80811576e−27 
               
               
                 C78 
                 −2.38436227e−31 
                 −6.67264596e−30 
               
               
                 C80 
                    1.8322377e−30 
                 −4.06002422e−29 
               
               
                 C82 
                    6.0376388e−30  
                  −4.8867685e−29 
               
               
                 C84 
                   6.31126749e−30 
                 −4.62454207e−29 
               
               
                 C86 
                   2.03909262e−30 
                 −2.42505377e−29 
               
               
                 C88 
                   3.81494935e−31 
                   3.31286928e−29 
               
               
                 C90 
                 −7.68322344e−33 
                    2.3776391e−29 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 4a for FIG. 18/19 
               
               
                   
               
               
                 Surface 
                 DCX 
                 DCY 
                 DCZ 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 Image plane 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 M8 
                 0.00000000 
                 −1.30183991 
                 570.42723037 
               
               
                 M7 
                 0.00000000 
                 −120.34881071 
                 75.51681848 
               
               
                 M6 
                 0.00000000 
                 80.00209606 
                 956.51104535 
               
               
                 M5 
                 0.00000000 
                 221.25925669 
                 1160.16077268 
               
               
                 M4 
                 0.00000000 
                 611.93258157 
                 1362.59488679 
               
               
                 M3 
                 0.00000000 
                 −309.46726913 
                 1055.74659104 
               
               
                 M2 
                 0.00000000 
                 −912.91463513 
                 655.60876883 
               
               
                 Stop 
                 0.00000000 
                 −1017.01458447 
                 474.86644530 
               
               
                 M1 
                 0.00000000 
                 −1353.15078666 
                 18.46126376 
               
               
                 Object plane 
                 0.00000000 
                 −1490.55625877 
                 1255.06787017 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 4b for FIG. 18/19 
               
               
                   
               
               
                 Surface 
                 TLA[deg] 
                 TLB[deg] 
                 TLC[deg] 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 Image plane 
                 −0.00000000 
                 0.00000000 
                 −0.00000000 
               
               
                 M8 
                 −6.69497001 
                 0.00000000 
                 −0.00000000 
               
               
                 M7 
                 166.96937929 
                 0.00000000 
                 −0.00000000 
               
               
                 M6 
                 66.23453752 
                 0.00000000 
                 −0.00000000 
               
               
                 M5 
                 41.49642028 
                 0.00000000 
                 −0.00000000 
               
               
                 M4 
                 −66.77054272 
                 0.00000000 
                 −0.00000000 
               
               
                 M3 
                 26.08077591 
                 0.00000000 
                 −0.00000000 
               
               
                 M2 
                 44.38277950 
                 0.00000000 
                 −0.00000000 
               
               
                 Stop 
                 12.99307149 
                 0.00000000 
                 −0.00000000 
               
               
                 M1 
                 165.88573894 
                 0.00000000 
                 −0.00000000 
               
               
                 Object plane 
                 1.47794550 
                 0.00000000 
                 −0.00000000 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 5 for FIG. 18/19 
               
               
                   
               
               
                   
                 Surface 
                 Angle of incidence [deg] 
                 Reflectivity 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                   
                 M8 
                 6.81465749 
                 0.66077811 
               
               
                   
                 M7 
                 0.54649170 
                 0.66565825 
               
               
                   
                 M6 
                 78.61351241 
                 0.85952413 
               
               
                   
                 M5 
                 77.19223505 
                 0.83894755 
               
               
                   
                 M4 
                 4.79028139 
                 0.66334071 
               
               
                   
                 M3 
                 83.41785810 
                 0.92088922 
               
               
                   
                 M2 
                 77.76117032 
                 0.84736477 
               
               
                   
                 M1 
                 20.39282100 
                 0.61112963 
               
               
                   
                 Overall transmission 
                   
                 0.1003 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
             
               
               
               
             
           
               
                 TABLE 6 for FIG. 18/19 
               
               
                   
               
               
                 X[mm] 
                 Y[mm] 
                 Z[mm] 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 0.00000000 
                 −74.74428964 
                 0.00000000 
               
               
                 −21.97577930 
                 −73.71157746 
                 0.00000000 
               
               
                 −43.54745003 
                 −70.64584812 
                 0.00000000 
               
               
                 −64.30774000 
                 −65.64223665 
                 0.00000000 
               
               
                 −83.84419262 
                 −58.85273624 
                 0.00000000 
               
               
                 −101.73934320 
                 −50.47789491 
                 0.00000000 
               
               
                 −117.57413522 
                 −40.75791226 
                 0.00000000 
               
               
                 −130.93536243 
                 −29.96439172 
                 0.00000000 
               
               
                 −141.42743062 
                 −18.39295269 
                 0.00000000 
               
               
                 −148.68831187 
                 −6.35605158 
                 0.00000000 
               
               
                 −152.40909162 
                 5.82486902 
                 0.00000000 
               
               
                 −152.35588367 
                 17.82898189 
                 0.00000000 
               
               
                 −148.39195432 
                 29.34768633 
                 0.00000000 
               
               
                 −140.49688466 
                 40.09648351 
                 −0.00000000 
               
               
                 −128.77941498 
                 49.82515047 
                 −0.00000000 
               
               
                 −113.48180409 
                 58.32554432 
                 −0.00000000 
               
               
                 −94.97550387 
                 65.43621405 
                 0.00000000 
               
               
                 −73.74931338 
                 71.04353087 
                 0.00000000 
               
               
                 −50.39169073 
                 75.07859450 
                 0.00000000 
               
               
                 −25.56884640 
                 77.50751380 
                 0.00000000 
               
               
                 −0.00000000 
                 78.31797873 
                 0.00000000 
               
               
                 25.56884640 
                 77.50751380 
                 0.00000000 
               
               
                 50.39169073 
                 75.07859450 
                 0.00000000 
               
               
                 73.74931338 
                 71.04353087 
                 0.00000000 
               
               
                 94.97550387 
                 65.43621405 
                 0.00000000 
               
               
                 113.48180409 
                 58.32554432 
                 −0.00000000 
               
               
                 128.77941498 
                 49.82515047 
                 0.00000000 
               
               
                 140.49688466 
                 40.09648351 
                 0.00000000 
               
               
                 148.39195432 
                 29.34768633 
                 −0.00000000 
               
               
                 152.35588367 
                 17.82898189 
                 0.00000000 
               
               
                 152.40909162 
                 5.82486902 
                 0.00000000 
               
               
                 148.68831187 
                 −6.35605158 
                 0.00000000 
               
               
                 141.42743062 
                 −18.39295269 
                 0.00000000 
               
               
                 130.93536243 
                 −29.96439172 
                 0.00000000 
               
               
                 117.57413522 
                 −40.75791226 
                 0.00000000 
               
               
                 101.73934320 
                 −50.47789491 
                 0.00000000 
               
               
                 83.84419262 
                 −58.85273624 
                 −0.00000000 
               
               
                 64.30774000 
                 −65.64223665 
                 0.00000000 
               
               
                 43.54745003 
                 −70.64584812 
                 0.00000000 
               
               
                 21.97577930 
                 −73.71157746 
                 0.00000000 
               
               
                   
               
             
          
         
       
     
         [0329]    An overall reflectivity of the projection optical unit  33  is 10.03%. 
         [0330]    The projection optical unit  33  has an image-side numerical aperture of 0.55. The image field  8  has an x-extent of two times 6.5 mm and a y-extent of 1.20 mm. The projection optical unit  33  is optimized for an operating wavelength of the illumination light  3  of 13.5 nm. 
         [0331]    The projection optical unit  33  has exactly eight mirrors M 1  to M 8 . The mirrors M 2  and M 3  on the one hand, and M 5 , M 6  on the other hand are embodied as mirrors for grazing incidence and are arranged in each case as a mirror pair directly behind one another in the imaging beam path. The projection optical unit  33  has exactly four mirrors for grazing incidence, namely the mirrors M 2 , M 3 , M 5  and M 6 . The mirrors M 1 , M 4 , M 7  and M 8  are embodied as mirrors for normal incidence. 
         [0332]    In the projection optical unit  33 , a stop  18  is arranged in the beam path between the mirrors M 1  and M 2 , near the grazing incidence on the mirror M 2 . Alternatively or additionally, a stop can be arranged directly on the surface of the mirror M 2 . 
         [0333]    The projection optical unit  33  has a reducing imaging scale β=7.00. 
         [0334]    An angle of incidence of the chief rays  16  in the object plane  5  is 6.4°. 
         [0335]    In the yz-plane, an entrance pupil of the projection optical unit  33  lies 7700 mm in front of the object field  4  in the beam path of the illumination light. In the xy-plane (cf.  FIG. 19 ), the entrance pupil lies 1775 mm after the object field in the imaging beam path of the projection optical unit  33 . An extent of the chief rays  16  emanating from the object field  4  is therefore convergent both in the meridional section according to  FIG. 18  and in the view according to  FIG. 19 . 
         [0336]    In the xz-section (cf.  FIG. 19 ), the stop  18  can lie at a position displaced in the z-direction compared to its position in the yz-section. 
         [0337]    A z-distance between the object field  4  and the image field  8  is approximately 1290 mm. 
         [0338]    An object/image offset (d OIS ) is approximately 1460 mm. 
         [0339]    A free working distance between the mirror M 7  and the image field  8  is 50 mm. 
         [0340]    In the projection optical unit  33 , a scanned RMS value for the wavefront aberration is at most 10 mλ and, on average, 8 mλ. 
         [0341]    A maximum distortion value is at most 0.03 nm in the x-direction and at most 0.08 nm in the y-direction. A telecentricity value in the x-direction is at most 0.79 mrad on the image field-side and a telecentricity value in the y-direction is at most 0.37 mrad on the image field-side. 
         [0342]    Further mirror data emerge from the following table. 
         [0000]    
       
         
               
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
               
             
           
               
                   
                 TABLE 7 for FIG. 18/19 
               
               
                   
                   
               
               
                   
                 M1 
                 M2 
                 M3 
                 M4 
                 M5 
                 M6 
                 M7 
                 M8 
               
               
                   
                   
               
             
             
               
                   
               
             
          
           
               
                 Maximum angle of incidence [deg] 
                 20.9 
                 81.5 
                 85.5 
                 6.0 
                 79.1 
                 81.9 
                 17.1 
                 8.3 
               
               
                 Mirror extent (x) [mm] 
                 224.5 
                 366.3 
                 511.9 
                 611.2 
                 448.5 
                 225.0 
                 261.2 
                 652.2 
               
               
                 Mirror extent (y) [mm] 
                 219.5 
                 326.9 
                 514.4 
                 83.3 
                 225.0 
                 308.6 
                 167.8 
                 642.2 
               
               
                 Maximum mirror diameter [mm] 
                 229.2 
                 368.5 
                 640.9 
                 611.3 
                 448.5 
                 310.5 
                 261.6 
                 652.5 
               
               
                   
               
             
          
         
       
     
         [0343]    There is an intermediate image  19  in the beam path in the imaging beam path region between the mirrors M 3  and M 4  in the yz-plane ( FIG. 18 ) and in the imaging beam path region between the mirrors M 6  and M 7  in the xz-plane ( FIG. 19 ). The intermediate image  19  can also be present in the region of a reflection on the mirror M 5  in the yz-plane. 
         [0344]    The mirror M 8  is obscured and includes a passage opening  17  for the passage of the illumination light  3  in the imaging beam path between the mirrors M 6  and M 7 . 
         [0345]    A pupil obscuration of the projection optical unit  33  is 14% of the image-side numerical aperture of the projection optical unit  33 . 
         [0346]    Only the last mirror M 8  in the imaging beam path includes a passage opening  17  for the imaging light  3 . All other mirrors M 1  to M 7  have a continuous reflection surface. The reflection surface of the mirror M 8  is used around the passage opening  17  thereof. 
         [0347]    The mirrors M 1 , M 3 , M 4  and M 8  have negative values for the radius, i.e. are, in principle, concave mirrors. The other mirrors M 2 , M 5 , M 6  and M 7  have positive values for the radius, i.e. are, in principle, convex mirrors. The mirrors M 2 , M 3 , M 5  and M 6  for grazing incidence have very large radii and only constitute small deviations from plane reflection surfaces. 
         [0348]    A further embodiment of a projection optical unit  34 , which can be used in the projection exposure apparatus  1  according to  FIG. 1  instead of e.g. the projection optical unit  7 , is explained in the following text on the basis of  FIGS. 20 and 21 . Components and functions which were already explained above in the context of  FIGS. 1 to 19  are appropriately denoted by the same reference signs and are not discussed again in detail.  FIG. 20  shows a meridional section of the projection optical unit  34 .  FIG. 21  shows a sagittal view of the projection optical unit  34 . 
         [0349]    The projection optical unit  34  has a total of 8 mirrors M 1  to M 8  and, in terms of the basic design thereof, it is similar to e.g. the projection optical unit  7  according to  FIG. 2 . 
         [0350]    The projection optical unit  34  is embodied as anamorphic optical unit. In the yz-section according to  FIG. 20 , the projection optical unit  34  has a reducing imaging scale β y  of 8.00. In the xz-plane (cf.  FIG. 21 ) perpendicular thereto, the projection optical unit  34  has a reducing imaging scale β x  of 4.00. 
         [0351]    In combination with a rotationally symmetric exit pupil of the projection optical unit  34 , these different imaging scales β x , β y  lead to an object-side numerical aperture being half the size in the yz-plane compared to the xz-plane, as emerges immediately from comparison between  FIGS. 20 and 21 . As a result of this, an advantageously small chief ray angle CRAO of 5.1° is obtained in the yz-plane. 
         [0352]    Advantages of an anamorphic projection lens connected herewith are also discussed in US 2013/0128251 A1, which is incorporated in its entirety in this application by reference. 
         [0353]    The anamorphic effect of the projection optical unit  34  is distributed to all optical surfaces of the mirrors M 1  to M 8 . 
         [0354]    The mirrors M 1  to M 8  are once again embodied as free-form surface mirrors, for which the free-form surface equation (1), specified above, applies. The optical design data from the projection optical unit  34  can be gathered from the following tables, which, in terms of their design, correspond to the tables for the projection optical unit  7  according to  FIG. 2 . 
         [0000]    
       
         
               
               
               
             
               
               
               
               
             
               
               
               
             
           
               
                 TABLE 1 for FIG. 20/21 
               
               
                   
               
               
                   
                 Exemplary embodiment 
                 FIG. 20/21 
               
               
                   
               
             
             
               
                   
                 NA 
                 0.55 
               
             
          
           
               
                   
                 Wavelength 
                 13.5 
                 nm 
               
               
                   
                 Field dimension x 
                 26.0 
                 mm 
               
               
                   
                 Field dimension y 
                 1.2 
                 mm 
               
               
                   
                 Field curvature 
                 0.0 
                 1/mm 
               
             
          
           
               
                   
                 Stop 
                 S9 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
               
               
             
               
               
               
               
               
               
             
           
               
                 TABLE 2 for FIG. 20/21 
               
               
                   
               
               
                 Surface 
                 Radius x[mm] 
                 Power x[1/mm] 
                 Radius y[mm] 
                 Power y[1/mm] 
                 Operating 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 M8 
                 −1133.32747304 
                 0.00175233 
                 −1023.64934352 
                 0.00196760 
                 REFL 
               
               
                 M7 
                 4406.38826107 
                 −0.00045387 
                 690.91205607 
                 −0.00289482 
                 REFL 
               
               
                 M6 
                 4739.61979766 
                 −0.00008693 
                 10074.88948477 
                 −0.00096360 
                 REFL 
               
               
                 M5 
                 21144.94473278 
                 −0.00002037 
                 72950.75367779 
                 −0.00012733 
                 REFL 
               
               
                 M4 
                 −2867.38401976 
                 0.00069495 
                 −4292.99198405 
                 0.00046759 
                 REFL 
               
               
                 M3 
                 — 
                 0.00002356 
                 — 
                 0.00071385 
                 REFL 
               
               
                 M2 
                 −5190.31139364 
                 0.00007024 
                 7573.47590770 
                 −0.00144869 
                 REFL 
               
               
                 M1 
                 −5923.95714844 
                 0.00031586 
                 −1898.45455510 
                 0.00112603 
                 REFL 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 3a for FIG. 20/21 
               
               
                   
               
               
                 Coefficient 
                 M8 
                 M7 
                 M6 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 KY 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 KX 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 RX 
                 −1133.32747300 
                 4406.38826100 
                 4739.61979800 
               
               
                 C7 
                 −1.37045485e−08 
                   7.46796053e−08 
                 −2.88085237e−08 
               
               
                 C9 
                 −7.61541557e−09 
                 −1.45727199e−07 
                 −1.79062014e−08 
               
               
                 C10 
                 −7.69203582e−12 
                   2.92796841e−10 
                   4.42007445e−11 
               
               
                 C12 
                  −2.2092406e−11 
                   1.13530474e−09 
                 −8.60191664e−12 
               
               
                 C14 
                 −1.03738908e−11 
                   1.40909304e−09 
                 −4.58761129e−11 
               
               
                 C16 
                 −7.31775261e−15 
                 −1.31555425e−13 
                 −1.45618208e−13 
               
               
                 C18 
                 −1.17172291e−14 
                 −6.54062794e−13 
                   4.24616003e−15 
               
               
                 C20 
                  −3.3983632e−15 
                 −3.50696381e−13 
                 −8.53811379e−14 
               
               
                 C21 
                 −9.15894595e−18 
                   2.09018129e−16 
                 −9.75508493e−17 
               
               
                 C23 
                  −3.5991906e−17 
                   2.50711167e−15 
                   3.58424992e−16 
               
               
                 C25 
                 −3.77287782e−17 
                   9.96925043e−15 
                 −1.56598011e−19 
               
               
                 C27 
                 −1.19641397e−17 
                   7.56226507e−15 
                 −2.28737536e−16 
               
               
                 C29 
                 −5.75050439e−21 
                   8.60467057e−19 
                 −9.76080298e−19 
               
               
                 C31 
                 −1.25790723e−20 
                   4.36789592e−18 
                 −8.89549297e−19 
               
               
                 C33 
                 −1.03115676e−20 
                 −9.69395674e−18 
                 −3.40251221e−19 
               
               
                 C35 
                 −2.20183332e−21 
                 −3.27752356e−18 
                 −6.53545396e−19 
               
               
                 C36 
                 −8.33157821e−24 
                   4.55264457e−22 
                   4.12907772e−21 
               
               
                 C38 
                 −4.25998322e−23 
                   7.24917406e−21 
                   1.05886868e−20 
               
               
                 C40 
                 −6.98306225e−23 
                   1.43589783e−20 
                   3.05154424e−21 
               
               
                 C42 
                  −4.8336845e−23  
                   8.43033547e−20 
                   2.41517735e−23 
               
               
                 C44 
                 −1.40394078e−23 
                   1.97591114e−19 
                  −1.6250366e−21 
               
               
                 C46 
                  −2.9814906e−27 
                 −4.16141287e−25 
                   6.47812725e−23 
               
               
                 C48 
                  −1.1220021e−26 
                 −9.85706306e−24 
                   2.80300383e−23 
               
               
                 C50 
                 −1.69711254e−26 
                   4.09860054e−23 
                   1.52687849e−23 
               
               
                 C52 
                 −8.57563301e−27 
                   1.47027541e−22 
                   7.02362488e−24 
               
               
                 C54 
                   1.76715393e−28 
                 −6.99745034e−23 
                 −2.14951543e−24 
               
               
                 C55 
                  −6.6288945e−30  
                   1.42110361e−27 
                 −2.82086233e−25 
               
               
                 C57 
                 −4.10869525e−29 
                 −4.51003428e−27 
                 −7.63377495e−25 
               
               
                 C59 
                 −9.17862325e−29 
                   7.25467897e−26 
                 −2.77480674e−25 
               
               
                 C61 
                 −9.90356193e−29 
                    3.9633015e−25  
                 −3.52163248e−26 
               
               
                 C63 
                 −5.59488161e−29 
                   9.95569594e−25 
                  −8.0432973e−28 
               
               
                 C65 
                 −7.22003129e−30 
                   −4.21378e−24  
                 −2.74410127e−27 
               
               
                 C67 
                 −5.24619854e−33 
                 −8.35761662e−30 
                  −9.1548449e−28 
               
               
                 C69 
                 −2.01840485e−32 
                   5.45404311e−29 
                 −5.39668302e−28 
               
               
                 C71 
                 −3.79282955e−32 
                 −2.97201132e−28 
                 −1.38362872e−27 
               
               
                 C73 
                 −2.44971235e−32 
                   3.25227818e−28 
                 −3.68928781e−28 
               
               
                 C75 
                 −7.62727889e−33 
                  −8.7212421e−27 
                 −1.16531263e−28 
               
               
                 C77 
                  −5.7359611e−33  
                   4.80554127e−27 
                 −4.17390192e−29 
               
               
                 C78 
                  −8.047176e−36 
                 −8.23504213e−33 
                   7.06018116e−30 
               
               
                 C80 
                  −5.4403674e−35  
                    2.3497042e−31 
                   1.86040123e−29 
               
               
                 C82 
                 −1.67551366e−34  
                   1.33047058e−30 
                    1.3421476e−29 
               
               
                 C84 
                  −2.6900642e−34  
                   5.04718453e−30 
                   4.72484176e−30 
               
               
                 C86 
                 −2.38083651e−34 
                 −7.80809697e−30 
                   4.75455568e−31 
               
               
                 C88 
                 −9.66546428e−35 
                   1.17080611e−29 
                 −1.51988786e−31 
               
               
                 C90 
                 −2.31041974e−35 
                   9.71583268e−29 
                 −2.31508815e−31 
               
               
                 C92 
                   3.72879241e−39 
                   1.17935322e−34 
                    3.7709135e−34 
               
               
                 C94 
                    1.5141875e−38 
                 −8.62572106e−36 
                 −7.82262879e−33 
               
               
                 C96 
                   3.40542449e−38 
                   3.38356865e−33 
                   3.57455642e−32 
               
               
                 C98 
                   3.58688134e−38 
                 −2.30440813e−34 
                   1.60062441e−32 
               
               
                 C100 
                 −4.37695745e−39 
                 −7.67777542e−33 
                   1.17807848e−33 
               
               
                 C102 
                 −9.00258499e−39 
                   1.15560849e−31 
                   4.06367757e−34 
               
               
                 C104 
                   9.73217887e−39 
                  −1.330225e−31 
                 −5.19167519e−34 
               
               
                 C105 
                 −3.15681223e−43 
                    8.5001124e−38 
                  −6.1641406e−35 
               
               
                 C107 
                 −6.71085246e−42 
                 −3.50192205e−37 
                 −1.25784732e−34 
               
               
                 C109 
                   1.81013759e−41 
                 −3.77112897e−36 
                 −1.73593348e−34 
               
               
                 C111 
                   1.21188506e−40 
                 −1.79399564e−35 
                 −1.92852546e−34 
               
               
                 C113 
                   2.12299664e−40 
                   4.42096118e−35 
                 −1.73174517e−35 
               
               
                 C115 
                   1.96801677e−40 
                   3.78745494e−34 
                 −5.80388951e−36 
               
               
                 C117 
                   6.74687492e−41 
                 −4.55929668e−35 
                   7.22309558e−37 
               
               
                 C119 
                   1.51520616e−41 
                 −4.50734906e−34 
                 −4.27492138e−37 
               
               
                 C121 
                 −3.77954419e−45 
                 0 
                 0 
               
               
                 C123 
                 −5.73506768e−44 
                 0 
                 0 
               
               
                 C125 
                 −1.67581738e−43 
                 0 
                 0 
               
               
                 C127 
                 −2.67358045e−43 
                 0 
                 0 
               
               
                 C129 
                 −2.40296709e−43 
                 0 
                 0 
               
               
                 C131 
                 −8.92457112e−44 
                 0 
                 0 
               
               
                 C133 
                 −1.44215565e−44 
                 0 
                 0 
               
               
                 C135 
                 −1.25305206e−44 
                 0 
                 0 
               
               
                 C136 
                 −1.34456467e−47 
                 0 
                 0 
               
               
                 C138 
                 −1.15917807e−46 
                 0 
                 0 
               
               
                 C140 
                  −4.9202134e−46 
                 0 
                 0 
               
               
                 C142 
                   −1.261638e−45 
                 0 
                 0 
               
               
                 C144 
                 −1.92457136e−45 
                 0 
                 0 
               
               
                 C146 
                 −1.81299242e−45 
                 0 
                 0 
               
               
                 C148 
                 −1.06311202e−45 
                 0 
                 0 
               
               
                 C150 
                  −3.3131362e−46 
                 0 
                 0 
               
               
                 C152 
                 −4.79751657e−47 
                 0 
                 0 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 3b for FIG. 20/21 
               
               
                   
               
               
                 Coefficient 
                 M5 
                 M4 
                 M3 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 KY 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 KX 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 RX 
                 21144.94473000 
                 −2867.38402000  
                 −10853.57484000 
               
               
                 C7 
                 −8.13271685e−08 
                 −3.58841707e−08 
                   5.29876767e−10 
               
               
                 C9 
                 −5.82176386e−08 
                 −7.04518606e−07 
                   2.10519305e−09 
               
               
                 C10 
                   9.37452981e−12 
                   1.30052051e−12  
                 −6.30399752e−12 
               
               
                 C12 
                   3.00680111e−11 
                   1.85556236e−10 
                 −5.20862433e−12 
               
               
                 C14 
                   8.83038021e−11 
                    3.5873503e−09 
                 −3.58045717e−12 
               
               
                 C16 
                   4.50889445e−14 
                 −8.90737179e−15 
                   1.13557992e−14 
               
               
                 C18 
                 −8.85586769e−15 
                 −1.37507133e−12 
                 −1.13089347e−16 
               
               
                 C20 
                 −2.84535698e−13 
                 −2.40161213e−11 
                    1.2693646e−15 
               
               
                 C21 
                  −4.0259975e−17 
                   9.84110093e−19  
                 −1.07753791e−17 
               
               
                 C23 
                 −1.60627908e−16 
                   1.18787038e−16  
                 −4.13074732e−18 
               
               
                 C25 
                 −2.12462221e−16 
                   1.07305967e−14 
                  −2.6198811e−18 
               
               
                 C27 
                   7.88491781e−16 
                   1.62876389e−13 
                 −1.51826315e−18 
               
               
                 C29 
                   8.29816991e−20 
                 −1.42315568e−21 
                   8.37815153e−21 
               
               
                 C31 
                   4.09821249e−19 
                 −1.53159656e−18 
                   2.70592478e−21 
               
               
                 C33 
                   1.04060872e−18 
                 −1.00776807e−16 
                   9.75607155e−22 
               
               
                 C35 
                 −2.28976537e−18 
                 −1.25474518e−15 
                   1.00241528e−21 
               
               
                 C36 
                 −1.07018867e−22 
                   1.36622356e−24 
                 −3.00882158e−23 
               
               
                 C38 
                 −4.94074303e−23 
                   2.88428049e−23 
                   2.10003322e−24 
               
               
                 C40 
                 −1.34527055e−21 
                   1.98696867e−20 
                   8.31511411e−24 
               
               
                 C42 
                 −4.60972729e−21 
                   1.12695754e−18 
                   3.79721863e−24 
               
               
                 C44 
                   4.81654378e−21 
                    1.6445151e−17 
                 −1.75074004e−25 
               
               
                 C46 
                   1.01635491e−24 
                 −5.39059369e−27 
                   2.00075589e−26 
               
               
                 C48 
                 −9.38768461e−25 
                   6.02027898e−25 
                   1.15956882e−26 
               
               
                 C50 
                 −7.09696896e−24 
                   1.64761111e−22 
                 −5.38272606e−27 
               
               
                 C52 
                 −2.38402664e−24 
                   3.42328361e−21 
                 −2.97501451e−27 
               
               
                 C54 
                 −2.26239625e−23 
                 −3.23207317e−19 
                 −5.02183701e−28 
               
               
                 C55 
                   1.26386187e−28 
                   1.71520917e−30 
                   9.81733067e−30 
               
               
                 C57 
                 −2.83068278e−27 
                   8.46560169e−29 
                 −3.36674489e−29 
               
               
                 C59 
                   2.46204893e−26 
                 −1.62710492e−26 
                  −9.5444995e−29 
               
               
                 C61 
                   9.95586051e−26 
                 −8.19930234e−24 
                 −8.78074754e−29 
               
               
                 C63 
                   1.01878932e−25 
                   1.62250965e−22 
                 −3.16474709e−29 
               
               
                 C65 
                   1.91562178e−25 
                 −5.94818356e−21 
                 −4.32421248e−30 
               
               
                 C67 
                 −3.08120032e−30 
                  −1.7543011e−33 
                  −6.8780555e−32 
               
               
                 C69 
                   4.41107086e−30 
                 −4.30759864e−30 
                  −8.633439e−32 
               
               
                 C71 
                  −2.847253e−29 
                 −2.73981339e−27 
                   6.96849436e−32 
               
               
                 C73 
                    4.4951507e−30 
                 −1.83904472e−25 
                   8.79586218e−32 
               
               
                 C75 
                   8.74287892e−29 
                 −8.91906155e−24 
                   2.23940855e−32 
               
               
                 C77 
                  −6.9255095e−28 
                   2.64874371e−22 
                   4.81131842e−33 
               
               
                 C78 
                   2.23687462e−34 
                 −1.85559281e−36 
                 −5.94735011e−35 
               
               
                 C80 
                  −7.0923897e−33 
                 −8.80329782e−35 
                   1.42958234e−34 
               
               
                 C82 
                 −2.40355343e−31 
                   1.32753328e−31 
                   3.76354599e−34 
               
               
                 C84 
                 −1.33477305e−30 
                    6.7062528e−29 
                   4.22628687e−34 
               
               
                 C86 
                 −3.52926483e−30 
                   4.70367187e−27 
                   2.68539626e−34 
               
               
                 C88 
                 −4.04944897e−30  
                 −1.60136059e−25 
                   9.37754675e−35 
               
               
                 C90 
                 −2.28582075e−32 
                   3.37934991e−24 
                   1.01872115e−35 
               
               
                 C92 
                   1.53053664e−35 
                   1.03181863e−38 
                   4.49578153e−37 
               
               
                 C94 
                   1.90635627e−34 
                   7.96148268e−37 
                   4.15343568e−37 
               
               
                 C96 
                    1.7721621e−33 
                   5.60447131e−33 
                 −1.33200295e−37 
               
               
                 C98 
                   7.04887896e−33 
                   5.29126054e−31 
                 −4.53303133e−37 
               
               
                 C100 
                   1.53325023e−32 
                   6.99281316e−29 
                 −2.18759113e−37 
               
               
                 C102 
                   1.55847895e−32 
                 0 
                  −2.6400999e−38 
               
               
                 C104 
                   5.50738373e−33 
                 0 
                 −5.86276203e−39 
               
               
                 C105 
                 −3.29469714e−39 
                    2.0787905e−42 
                 −7.97361647e−43 
               
               
                 C107 
                 −6.03049846e−38 
                   8.43168465e−40 
                 −9.19641517e−40 
               
               
                 C109 
                 −5.38471092e−37  
                 −2.34623974e−37 
                 −7.68527335e−40 
               
               
                 C111 
                 −3.36030533e−36 
                 −1.09110522e−34 
                 −5.25251603e−40 
               
               
                 C113 
                 −1.05801312e−35  
                 −2.66122693e−32 
                 −3.43774941e−40 
               
               
                 C115 
                 −2.05317853e−35 
                 0 
                  −3.0477398e−40 
               
               
                 C117 
                 −1.88191883e−35 
                 0 
                 −1.37941097e−40 
               
               
                 C119 
                  −9.0448429e−36 
                 0 
                 −1.23378749e−41 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
             
               
               
               
             
           
               
                 TABLE 3c for FIG. 20/21 
               
               
                   
               
               
                 Coefficient 
                 M2 
                 M1 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 KY 
                 0.00000000  
                 0.00000000  
               
               
                 KX 
                 0.00000000 
                 0.00000000 
               
               
                 RX 
                 −5190.31139400 
                 −5923.95714800 
               
               
                 C7 
                 −5.28973257e−09 
                 −9.34107203e−08 
               
               
                 C9 
                   3.16117691e−08 
                 −3.08170947e−08 
               
               
                 C10 
                  −3.5113151e−11 
                   2.15749003e−11 
               
               
                 C12 
                 −5.94839832e−11 
                 −4.16147444e−11 
               
               
                 C14 
                   4.15396704e−11 
                 −9.60232617e−12 
               
               
                 C16 
                    8.8719325e−14 
                 −1.38710348e−13 
               
               
                 C18 
                   2.11910791e−14 
                 −4.21723708e−13 
               
               
                 C20 
                   5.83626437e−14 
                   1.56831697e−13 
               
               
                 C21 
                 −7.52771425e−17 
                    2.2883345e−17 
               
               
                 C23 
                   2.86726561e−17 
                 −7.98916101e−17 
               
               
                 C25 
                 −6.07859472e−17 
                 −6.15893157e−16 
               
               
                 C27 
                   9.82616796e−17 
                   6.98313821e−16 
               
               
                 C29 
                 −1.44090078e−21 
                 −1.67084874e−20 
               
               
                 C31 
                   1.04190298e−19 
                   1.24909603e−19 
               
               
                 C33 
                   1.81953338e−20 
                 −5.55656679e−19 
               
               
                 C35 
                    2.0422779e−19 
                 −3.23336886e−18 
               
               
                 C36 
                 −1.68993866e−23 
                 −3.08540907e−25 
               
               
                 C38 
                 −5.92115931e−23 
                 −6.92333888e−22 
               
               
                 C40 
                   3.83068102e−23 
                 −1.17221531e−21 
               
               
                 C42 
                 −9.31939644e−23 
                   1.57625031e−21 
               
               
                 C44 
                   3.54805796e−22 
                 −4.85282982e−20 
               
               
                 C46 
                   1.64542991e−25 
                   7.61056694e−26 
               
               
                 C48 
                 −2.94838765e−25 
                    1.5289645e−24 
               
               
                 C50 
                 −1.09554398e−24 
                   8.66857734e−24 
               
               
                 C52 
                 −1.81472711e−24 
                   2.18885048e−23 
               
               
                 C54 
                 −1.10156139e−25 
                   2.98501444e−22 
               
               
                 C55 
                 −3.91686651e−28 
                 −3.84029125e−29 
               
               
                 C57 
                 −9.77388973e−28 
                   8.12604652e−27 
               
               
                 C59 
                 −6.14630023e−28 
                   4.79732982e−26 
               
               
                 C61 
                 −1.27909521e−27 
                    3.3152603e−26 
               
               
                 C63 
                 −4.46201357e−27 
                  −2.9689908e−25 
               
               
                 C65 
                 −2.14425067e−28 
                   2.24300892e−24 
               
               
                 C67 
                   3.17153528e−32 
                 −3.98900423e−30 
               
               
                 C69 
                   6.31254012e−30 
                 −4.30683926e−29 
               
               
                 C71 
                   1.77074038e−29 
                 −3.09345554e−28 
               
               
                 C73 
                   2.94127232e−29 
                  −3.2763638e−28 
               
               
                 C75 
                    1.7371783e−29 
                   1.84376033e−28 
               
               
                 C77 
                   9.59406388e−30 
                 −9.29242727e−27 
               
               
                 C78 
                   2.26427738e−33 
                   6.44291133e−34 
               
               
                 C80 
                   6.98015663e−33 
                 −7.26102976e−32 
               
               
                 C82 
                   3.90295139e−33 
                 −8.26037127e−31 
               
               
                 C84 
                   1.00563556e−32 
                 −2.47229342e−30 
               
               
                 C86 
                   5.31207359e−32 
                   1.36267497e−30 
               
               
                 C88 
                   4.68167146e−32 
                    1.1558863e−29 
               
               
                 C90 
                   2.22750927e−32 
                 −6.48766222e−29 
               
               
                 C92 
                   4.94909078e−36 
                     2.123736e−35 
               
               
                 C94 
                 −2.40458792e−35 
                   2.73287712e−34 
               
               
                 C96 
                 −6.91070231e−35 
                   2.28462552e−33 
               
               
                 C98 
                 −1.61918658e−34 
                   6.85274826e−33 
               
               
                 C100 
                 −1.44300155e−34 
                 −4.32046035e−33 
               
               
                 C102 
                 −7.93406187e−35 
                 −1.07655048e−32 
               
               
                 C104 
                 −1.66530071e−35 
                   1.27235198e−31 
               
               
                 C105 
                   5.86498685e−40  
                 −4.29231126e−39 
               
               
                 C107 
                 −1.54194375e−38 
                   2.35882135e−37 
               
               
                 C109 
                 −7.13318326e−39 
                   4.70203204e−36 
               
               
                 C111 
                 −1.43456171e−38 
                   2.37591177e−35 
               
               
                 C113 
                 −1.90286626e−37 
                   3.22170482e−35 
               
               
                 C115 
                 −2.94354338e−37 
                 −8.87390817e−35 
               
               
                 C117 
                 −2.19039138e−37 
                 −1.98534313e−34 
               
               
                 C119 
                 −6.06928085e−38 
                   8.31104332e−34 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 4a for FIG. 20/21 
               
               
                   
               
               
                 Surface 
                 DCX 
                 DCY 
                 DCZ 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 Image plane 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 M8 
                 0.00000000 
                 0.35696376 
                 928.41215449 
               
               
                 M7 
                 0.00000000 
                 −194.00592810 
                 123.62549517 
               
               
                 M6 
                 0.00000000 
                 110.73807678 
                 1485.21127288 
               
               
                 M5 
                 0.00000000 
                 410.24860809 
                 1906.05090667 
               
               
                 M4 
                 0.00000000 
                 989.83215098 
                 2227.66851159 
               
               
                 M3 
                 0.00000000 
                 −480.76794337 
                 1725.54436925 
               
               
                 M2 
                 0.00000000 
                 −1586.00680196 
                 983.72854005 
               
               
                 Stop 
                 0.00000000 
                 −1833.30051904 
                 630.89726836 
               
               
                 M1 
                 0.00000000 
                 −2256.96990972 
                 48.20891557 
               
               
                 Object plane 
                 0.00000000 
                 −2433.04940926 
                 1809.33615616 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
               
             
               
               
               
               
               
             
           
               
                   
                 TABLE 4b for FIG. 20/21 
               
               
                   
                   
               
               
                   
                 Surface 
                 TLA[deg] 
                 TLB[deg] 
                 TLC[deg] 
               
               
                   
                   
               
             
             
               
                   
               
             
          
           
               
                   
                 Image plane 
                 −0.00000000 
                 0.00000000 
                 −0.00000000 
               
               
                   
                 M8 
                 −6.81158601 
                 0.00000000 
                 −0.00000000 
               
               
                   
                 M7 
                 166.85343770 
                 0.00000000 
                 −0.00000000 
               
               
                   
                 M6 
                 65.47067671 
                 0.00000000 
                 −0.00000000 
               
               
                   
                 M5 
                 41.13388792 
                 0.00000000 
                 −0.00000000 
               
               
                   
                 M4 
                 −66.25259654 
                 0.00000000 
                 −0.00000000 
               
               
                   
                 M3 
                 26.32646837 
                 0.00000000 
                 −0.00000000 
               
               
                   
                 M2 
                 43.98793212 
                 0.00000000 
                 −0.00000000 
               
               
                   
                 Stop 
                 17.85348492 
                 0.00000000 
                 −0.00000000 
               
               
                   
                 M1 
                 165.03170476 
                 0.00000000 
                 −0.00000000 
               
               
                   
                 Object plane  
                 0.84183854 
                 0.00000000 
                 −0.00000000 
               
               
                   
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 5 for FIG. 20/21 
               
               
                   
               
               
                   
                 Surface 
                 Êinfallswinkel [deg] 
                 Reflectivity 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                   
                 M8 
                 6.79146457 
                 0.66081301 
               
               
                   
                 M7 
                 0.47255204 
                 0.66566232 
               
               
                   
                 M6 
                 78.11128013 
                 0.85242200 
               
               
                   
                 M5 
                 77.56569142 
                 0.84450121 
               
               
                   
                 M4 
                 4.90369075 
                 0.66322257 
               
               
                   
                 M3 
                 82.65450170 
                 0.91169087 
               
               
                   
                 M2 
                 79.49691949 
                 0.87161748 
               
               
                   
                 M1 
                 20.67887147 
                 0.60924189 
               
               
                   
                 Overall transmission 
                   
                 0.1017 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
             
               
               
               
             
           
               
                 TABLE 6 for FIG. 20/21 
               
               
                   
               
               
                 X[mm] 
                 Y[mm] 
                 Z[mm] 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 0.00000000 
                 −127.83604117 
                 0.00000000 
               
               
                 −42.47230052 
                 −125.94642328 
                 0.00000000 
               
               
                 −84.13944596 
                 −120.36530056 
                 0.00000000 
               
               
                 −124.19202701 
                 −111.34341136 
                 0.00000000 
               
               
                 −161.81430598 
                 −99.26141457 
                 0.00000000 
               
               
                 −196.18564839 
                 −84.58693884 
                 0.00000000 
               
               
                 −226.48648672 
                 −67.83445412 
                 0.00000000 
               
               
                 −251.91061812 
                 −49.53759338 
                 0.00000000 
               
               
                 −271.68668618 
                 −30.23530779 
                 0.00000000 
               
               
                 −285.11143299 
                 −10.46743152 
                 0.00000000 
               
               
                 −291.59521276 
                 9.22826034 
                 0.00000000 
               
               
                 −290.71624730 
                 28.32744481 
                 0.00000000 
               
               
                 −282.27411538 
                 46.34275447 
                 0.00000000 
               
               
                 −266.32872550 
                 62.84972374 
                 0.00000000 
               
               
                 −243.21383327 
                 77.50530904 
                 0.00000000 
               
               
                 −213.52264822 
                 90.05981266 
                 0.00000000 
               
               
                 −178.07097077 
                 100.36136137 
                 0.00000000 
               
               
                 −137.84767730 
                 108.34615051 
                 0.00000000 
               
               
                 −93.96325338 
                 114.01343410 
                 0.00000000 
               
               
                 −47.60455320 
                 117.39298190 
                 −0.00000000 
               
               
                 −0.00000000 
                 118.51540025 
                 0.00000000 
               
               
                 47.60455320 
                 117.39298190 
                 −0.00000000 
               
               
                 93.96325338 
                 114.01343410 
                 0.00000000 
               
               
                 137.84767730 
                 108.34615051 
                 0.00000000 
               
               
                 178.07097077 
                 100.36136137 
                 0.00000000 
               
               
                 213.52264822 
                 90.05981266 
                 0.00000000 
               
               
                 243.21383327 
                 77.50530904 
                 0.00000000 
               
               
                 266.32872550 
                 62.84972374 
                 0.00000000 
               
               
                 282.27411538 
                 46.34275447 
                 0.00000000 
               
               
                 290.71624730 
                 28.32744481 
                 0.00000000 
               
               
                 291.59521276 
                 9.22826034 
                 0.00000000 
               
               
                 285.11143299 
                 −10.46743152 
                 0.00000000 
               
               
                 271.68668618 
                 −30.23530779 
                 0.00000000 
               
               
                 251.91061812 
                 −49.53759338 
                 0.00000000 
               
               
                 226.48648672 
                 −67.83445412 
                 0.00000000 
               
               
                 196.18564839 
                 −84.58693884 
                 0.00000000 
               
               
                 161.81430598 
                 −99.26141457 
                 0.00000000 
               
               
                 124.19202701 
                 −111.34341136 
                 0.00000000 
               
               
                 84.13944596 
                 −120.36530056 
                 0.00000000 
               
               
                 42.47230052 
                 −125.94642328 
                 0.00000000 
               
               
                   
               
             
          
         
       
     
         [0355]    An overall reflectivity of the projection optical unit  34  is 10.17%. 
         [0356]    The projection optical unit  34  has an image-side numerical aperture of 0.55. The image field  8  has an x-extent of two times 13 mm and a y-extent of 1.20 mm. The projection optical unit  34  is optimized for an operating wavelength of the illumination light  3  of 13.5 nm. 
         [0357]    The projection optical unit  34  has exactly eight mirrors M 1  to M 8 . The mirrors M 2  and M 3  on the one hand, and M 5 , M 6  on the other hand are embodied as mirrors for grazing incidence and are arranged in each case as a mirror pair directly behind one another in the imaging beam path. The projection optical unit  34  has exactly four mirrors for grazing incidence, namely the mirrors M 2 , M 3 , M 5  and M 6 . The mirrors M 1 , M 4 , M 7  and M 8  are embodied as mirrors for normal incidence. 
         [0358]    In the projection optical unit  34 , a stop  18  is arranged in the beam path between the mirrors M 1  and M 2 , near the grazing incidence on the mirror M 2 . Alternatively or additionally, a stop can be arranged directly on the surface of the mirror M 2 . 
         [0359]    In the xz-plane (cf.  FIG. 21 ), an entrance pupil of the projection optical unit  34  lies 2740 mm in front of the object field  4  in the beam path of the illumination light. In the yz-plane, the entrance pupil lies 5430 mm after the object field in the imaging beam path of the projection optical unit  34 . An extent of the chief rays  16  emanating from the object field  4  is therefore convergent both in the meridional section according to  FIG. 20  and in the view according to  FIG. 21 . 
         [0360]    In the xz-section (cf.  FIG. 21 ), the stop  18  can lie at a position displaced in the z-direction compared to its position in the yz-section. The stop  18  is planar and tilted with respect to the image field. The long extent of the stop  18  in the x-direction is 583.18 mm. The overall extent of the stop  18  in the y-direction is 238.85 mm. 
         [0361]    A z-distance between the object field  4  and the image field  8  is approximately 1850 mm. 
         [0362]    An object/image offset (d OIS ) is approximately 2400 mm. 
         [0363]    A free working distance between the mirror M 7  and the image field  8  is 83 mm. 
         [0364]    In the projection optical unit  34 , a scanned RMS value for the wavefront aberration is at most 8 mλ and, on average, 7 mλ. 
         [0365]    A maximum distortion value is at most 0.10 nm in the x-direction and at most 0.10 nm in the y-direction. A telecentricity value in the x-direction is at most 1.58 mrad on the image field-side and a telecentricity value in the y-direction is at most 0.15 mrad on the image field-side. 
         [0366]    Further mirror data emerge from the following table. 
         [0000]    
       
         
               
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
               
             
           
               
                   
                 TABLE 7 for FIG. 20/21 
               
               
                   
                   
               
               
                   
                 M1 
                 M2 
                 M3 
                 M4 
                 M5 
                 M6 
                 M7 
                 M8 
               
               
                   
                   
               
             
             
               
                   
               
             
          
           
               
                 Maximum angle of incidence [deg] 
                 20.9 
                 81.9 
                 83.8 
                 7.0 
                 79.8 
                 81.2 
                 17.2 
                 8.3 
               
               
                 Mirror extent (x) [mm] 
                 525.7 
                 662.4 
                 847.1 
                 984.1 
                 675.6 
                 325.0 
                 482.9 
                 1074.4 
               
               
                 Mirror extent (y) [mm] 
                 268.1 
                 512.7 
                 856.1 
                 66.4 
                 336.1 
                 466.1 
                 277.4 
                 1053.4 
               
               
                 Maximum mirror diameter [mm] 
                 525.8 
                 662.5 
                 926.3 
                 984.1 
                 675.6 
                 470.0 
                 483.0 
                 1076.0 
               
               
                   
               
             
          
         
       
     
         [0367]    There is an intermediate image  19  in the beam path in the region of a reflection on the mirror M 4  in the yz-plane ( FIG. 20 ) and in the imaging beam path region between the mirrors M 6  and M 7  parallel to the xz-plane ( FIG. 21 ). 
         [0368]    The mirror M 8  is obscured and includes a passage opening  17  for the passage of the illumination light  3  in the imaging beam path between the mirrors M 6  and M 7 . 
         [0369]    Only the last mirror M 8  in the imaging beam path includes a passage opening  17  for the imaging light  3 . All other mirrors M 1  to M 7  have a continuous reflection surface. The reflection surface of the mirror M 8  is used around the passage opening  17  thereof. 
         [0370]    The mirrors M 1 , M 3 , M 4  and M 8  have negative values for the radius, i.e. are, in principle, concave mirrors. The other mirrors M 2 , M 5 , M 6  and M 7  have positive values for the radius, i.e. are, in principle, convex mirrors. The mirrors M 2 , M 3 , M 5  and M 6  for grazing incidence have very large radii and only constitute small deviations from plane reflection surfaces. 
         [0371]      FIG. 21A  shows edge contours of the surfaces on the mirrors M 1  to M 8  of the projection optical unit  34  which are in each case impinged upon by illumination light  3 , i.e. the so-called footprints of the mirrors M 1  to M 8 . These edge contours are in each case depicted in an x/y-diagram which corresponds to the local x- and y-coordinates of the respective mirror M 1  to M 8 . The illustrations are true to scale in millimeters. The mirrors M 2 , M 3  and M 8  have an x/y-aspect ratio which does not deviate, or only deviates slightly, from the value 1. The mirrors M 1  and M 5  and also M 7  have an x/y-aspect ratio of approximately 2. The mirror M 4  has an x/y-aspect ratio of approximately 15. The mirror M 6  has an x/y-aspect ratio of approximately 0.7. 
         [0372]    A further embodiment of a projection optical unit  35 , which can be used in the projection exposure apparatus  1  according to  FIG. 1  instead of e.g. the projection optical unit  7 , is explained in the following text on the basis of  FIGS. 22 and 23 . Components and functions which were already explained above in the context of  FIGS. 1 to 21A  are appropriately denoted by the same reference signs and are not discussed again in detail.  FIG. 22  shows a meridional section of the projection optical unit  35 .  FIG. 23  shows a sagittal view of the projection optical unit  35 . 
         [0373]    The projection optical unit  35  has a total of 8 mirrors M 1  to M 8  and, in terms of the basic design thereof, it is similar to e.g. the projection optical unit  7  according to  FIG. 2 . 
         [0374]    The projection optical unit  35  is embodied as anamorphic optical unit. In the yz-section according to  FIG. 22 , the projection optical unit  35  has a reducing imaging scale β y  of 6.00. In the xz-plane (cf.  FIG. 23 ) perpendicular thereto, the projection optical unit  35  has a reducing imaging scale β x  of 4.00. 
         [0375]    These different imaging scales β x , β y  lead to an object-side numerical aperture being smaller in the yz-plane than in the xz-plane, as emerges immediately from comparison between  FIGS. 22 and 23 . As a result of this, an advantageously small chief ray angle CRAO of 6.3° is obtained in the yz-plane. 
         [0376]    The anamorphic effect of the projection optical unit  35  is distributed to all optical surfaces of the mirrors M 1  to M 8 . 
         [0377]    The mirrors M 1  to M 8  are once again embodied as free-form surface mirrors, for which the free-form surface equation (1), specified above, applies. The optical design data from the projection optical unit  35  can be gathered from the following tables, which, in terms of their design, correspond to the tables for the projection optical unit  7  according to  FIG. 2 . 
         [0000]    
       
         
               
               
               
             
               
               
               
               
             
               
               
               
             
           
               
                 TABLE 1 for FIG. 22/23 
               
               
                   
               
               
                   
                 Exemplary embodiment 
                 FIG. 22/23 
               
               
                   
               
             
             
               
                   
                 NA 
                 0.49 
               
             
          
           
               
                   
                 Wavelength 
                 13.5 
                 nm 
               
               
                   
                 Field dimension x 
                 26.0 
                 mm 
               
               
                   
                 Field dimension y 
                 1.6 
                 mm 
               
               
                   
                 Field curvature 
                 0.0 
                 1/mm 
               
             
          
           
               
                   
                 Stop 
                 S9 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
               
               
             
               
               
               
               
               
               
             
           
               
                 TABLE 2 for FIG. 22/23 
               
               
                   
               
               
                 Surface 
                 Radius x[mm] 
                 Power x[1/mm] 
                 Radius y[mm] 
                 Power y[1/mm] 
                 Operating 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 M8 
                 −1121.37889641 
                 0.00177101 
                 −1023.61301917 
                 0.00196766 
                 REFL 
               
               
                 M7 
                 4813.84973129 
                 −0.00041545 
                 689.47522791 
                 −0.00290086 
                 REFL 
               
               
                 M6 
                 7961.52706392 
                 −0.00005196 
                 10472.69061413 
                 −0.00092320 
                 REFL 
               
               
                 M5 
                 63451.73749313 
                 −0.00000674 
                 — 
                 0.00013019 
                 REFL 
               
               
                 M4 
                 −2879.29868612 
                 0.00069194 
                 −5323.52677528 
                 0.00037714 
                 REFL 
               
               
                 M3 
                 — 
                 0.00002283 
                 — 
                 0.00079438 
                 REFL 
               
               
                 M2 
                 −6051.13629901 
                 0.00005747 
                 5373.11013087 
                 −0.00214085 
                 REFL 
               
               
                 M1 
                 −7070.71042694 
                 0.00026365 
                 −1740.13114618 
                 0.00123306 
                 REFL 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
             
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 3A 
               
             
             
               
                   
               
               
                 for Figure 22/23 
               
             
          
           
               
                 Coefficient 
                 M8 
                 M7 
                 M6 
               
               
                   
               
             
          
           
               
                 KY 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 KX 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 RX 
                 −1121.37889600 
                 4813.84973100 
                 7961.52706400 
               
               
                 C7  
                 −1.18303428e−08 
                 1.38677591e−07 
                 4.50959592e−08 
               
               
                 C9  
                 −9.04489424e−09 
                 −2.49942276e−07 
                 −3.22908374e−08 
               
               
                 C10  
                 −5.56852211e−12 
                 3.59231824e−10 
                 1.39261473e−10 
               
               
                 C12  
                 −2.2156858e−11 
                 1.11674106e−09 
                 −1.58384659e−10 
               
               
                 C14  
                 −6.4485662e−12 
                 7.68944651e−10 
                 −4.64967002e−11 
               
               
                 C16  
                 −5.99476799e−15 
                 −1.25877621e−13 
                 −6.14806551e−13 
               
               
                 C18  
                 −1.17154189e−14 
                 −8.32139172e−13 
                 6.1577807e−14 
               
               
                 C20  
                 −6.35164457e−15 
                 −1.04560226e−12 
                 −1.56127394e−13 
               
               
                 C21  
                 −1.01505313e−17 
                 2.28624052e−16 
                 −3.24656403e−16 
               
               
                 C23  
                 −3.58157787e−17 
                 2.8674558e−15 
                 1.48986258e−15 
               
               
                 C25  
                 −3.28325694e−17 
                 7.19573474e−15 
                 −4.96219439e−16 
               
               
                 C27  
                 −7.73325248e−18 
                 3.33755229e−15 
                 −3.25304321e−16 
               
               
                 C29  
                 −4.20439801e−21 
                 1.11781377e−18 
                 1.99348552e−18 
               
               
                 C31  
                 −1.22366176e−20 
                 2.12044512e−18 
                 −3.13360785e−18 
               
               
                 C33  
                 −1.33129381e−20 
                 −1.15534587e−17 
                 −6.05173065e−20 
               
               
                 C35  
                 −4.96149215e−21 
                 −1.08505991e−17 
                 −7.96524541e−19 
               
               
                 C36  
                 −8.64520812e−24 
                 1.17916451e−21 
                 4.32310419e−22 
               
               
                 C38  
                 −4.20401284e−23 
                 7.44374387e−21 
                 −6.15076012e−21 
               
               
                 C40  
                 −6.32215484e−23 
                 1.2747226e−20 
                 6.73662583e−21 
               
               
                 C42  
                 −3.86493292e−23 
                 4.95955342e−20 
                 −6.33665608e−22 
               
               
                 C44  
                 −7.91782043e−24 
                 3.24541865e−20 
                 −2.74989457e−21 
               
               
                 C46  
                 −2.33453384e−27 
                 −2.60631426e−24 
                 −3.91508173e−24 
               
               
                 C48  
                 −1.2111516e−26 
                 −2.33541368e−23 
                 1.99392725e−24 
               
               
                 C50  
                 −2.11068645e−26 
                 −3.6973872e−23 
                 −2.14301967e−23 
               
               
                 C52  
                 −1.4752144e−26 
                 −7.99170432e−23 
                 −1.74710333e−23 
               
               
                 C54  
                 −2.78281412e−27 
                 2.51969672e−22 
                 −8.23051883e−24 
               
               
                 C55  
                 −9.3090786e−30 
                 −5.20473578e−28 
                 −3.87769553e−27 
               
               
                 C57  
                 −4.82558402e−29 
                 7.88777677e−27 
                 2.66612565e−27 
               
               
                 C59  
                 −1.01014959e−28 
                 8.54406184e−26 
                 −5.91238257e−26 
               
               
                 C61  
                 −1.01884048e−28 
                 2.13476338e−25 
                 −9.52500131e−26 
               
               
                 C63  
                 −4.93105369e−29 
                 1.13995538e−24 
                 −5.50812191e−26 
               
               
                 C65  
                 −8.3687505e−30 
                 −5.12746033e−25 
                 −2.47004376e−26 
               
               
                 C67  
                 −7.38344559e−34 
                 1.47520112e−29 
                 7.1085924e−29 
               
               
                 C69  
                 −5.65274775e−33 
                 1.61742091e−28 
                 3.53277318e−28 
               
               
                 C71  
                 −1.37764606e−32 
                 3.44509275e−28 
                 2.93969176e−28 
               
               
                 C73  
                 −1.94275915e−32 
                 5.48602534e−28 
                 2.20566794e−28 
               
               
                 C75  
                 −1.39583588e−32 
                 −5.18813001e−27 
                 1.06448096e−28 
               
               
                 C77  
                 −4.27384745e−33 
                 −4.35332176e−27 
                 −9.78424185e−29 
               
               
                 C78  
                 −8.54420454e−37 
                 8.35040636e−33 
                 2.58890164e−32 
               
               
                 C80  
                 −2.31228001e−35 
                 1.76870158e−31 
                 −5.38428428e−31 
               
               
                 C82  
                 −5.6838319e−35 
                 1.22604787e−31 
                 −5.84517587e−31 
               
               
                 C84  
                 −7.66291033e−35 
                 −2.91896005e−31 
                 1.4024938e−30 
               
               
                 C86  
                 −6.31178383e−35 
                 −2.08128795e−30 
                 2.01491828e−30 
               
               
                 C88  
                 −3.30768172e−35 
                 5.15327359e−30 
                 2.88799603e−31 
               
               
                 C90  
                 −6.60293612e−36 
                 6.34662561e−30 
                 −1.56186793e−31 
               
               
                 C92  
                 −6.89240073e−39 
                 0 
                 0 
               
               
                 C94  
                 −2.22316469e−38 
                 0 
                 0 
               
               
                 C96  
                 −6.89815447e−38 
                 0 
                 0 
               
               
                 C98  
                 −9.26549465e−38 
                 0 
                 0 
               
               
                 C100 
                 −5.535508e−38 
                 0 
                 0 
               
               
                 C102 
                 −1.37382595e−38 
                 0 
                 0 
               
               
                 C104 
                 −2.77235312e−39 
                 0 
                 0 
               
               
                 C105 
                 −1.32648355e−41 
                 0 
                 0 
               
               
                 C107 
                 −1.08701271e−40 
                 0 
                 0 
               
               
                 C109 
                 −3.57659282e−40 
                 0 
                 0 
               
               
                 C111 
                 −6.22339725e−40 
                 0 
                 0 
               
               
                 C113 
                 −6.31535758e−40 
                 0 
                 0 
               
               
                 C115 
                 −3.50492314e−40 
                 0 
                 0 
               
               
                 C117 
                 −8.26138611e−41 
                 0 
                 0 
               
               
                 C119 
                 −4.09212691e−42 
                 0 
                 0 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
             
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 3B 
               
             
             
               
                   
               
               
                 for Figure 22/23 
               
             
          
           
               
                 Coefficient 
                 M5 
                 M4 
                 M3 
               
               
                   
               
             
          
           
               
                 KY 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 KX 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 RX 
                 63451.73749000 
                 −2879.29868600 
                 −11586.49414000 
               
               
                 C7  
                 −9.65439819e−08 
                 −5.21928877e−08 
                 −5.17057407e−09 
               
               
                 C9  
                 −4.4513793e−08 
                 −6.81657841e−07 
                 3.86113841e−09 
               
               
                 C10 
                 2.42543649e−11 
                 7.64041622e−13 
                 −1.02639927e−11 
               
               
                 C12 
                 8.44725177e−11  
                 1.99750296e−10 
                 −4.79572504e−12 
               
               
                 C14 
                 7.04127351e−11  
                 3.06515788e−09 
                 −4.42190289e−12 
               
               
                 C16 
                 −3.41516947e−14 
                 −2.37609081e−14 
                 8.82004007e−15 
               
               
                 C18 
                 −1.98478544e−13 
                 −1.56031785e−12 
                 −9.88386961e−16 
               
               
                 C20 
                 −2.68645804e−13  
                 −1.9204511e−11 
                 1.72706853e−15 
               
               
                 C21 
                 −3.59158408e−17  
                 1.13052962e−18 
                 3.41000671e−18 
               
               
                 C23 
                 3.64471697e−17  
                 2.10998699e−16 
                 −3.70359019e−18 
               
               
                 C25 
                 4.18205639e−16  
                 1.08957074e−14 
                 −1.71679008e−18 
               
               
                 C27 
                 9.35618672e−16  
                 1.32227766e−13 
                 −1.70575731e−18 
               
               
                 C29 
                 1.153762e−19 
                 −1.205391e−20 
                 −4.77242785e−21 
               
               
                 C31 
                 1.08387142e−20 
                 −2.2598668e−18 
                 1.1307014e−21 
               
               
                 C33 
                 −1.29076401e−18 
                 −9.90347004e−17 
                 1.61393734e−22 
               
               
                 C35 
                 −3.11679607e−18 
                 −5.16190495e−16 
                 1.06465407e−21 
               
               
                 C36 
                 3.2037253e−23 
                 2.44573623e−25 
                 −5.23904465e−24 
               
               
                 C38 
                 −3.00422396e−22 
                 2.02451858e−22 
                 6.39454501e−24 
               
               
                 C40 
                 −5.56453309e−22 
                 2.77540352e−20 
                 −2.38654616e−26 
               
               
                 C42 
                 1.15075161e−21  
                 7.77510206e−19 
                 −8.27248728e−25 
               
               
                 C44 
                 −8.45545916e−21  
                 1.83631375e−16 
                 −1.10257267e−24 
               
               
                 C46 
                 −7.17799435e−26 
                 −6.16666974e−27 
                 3.71377518e−27 
               
               
                 C48 
                 4.41056949e−25 
                 −1.77193124e−24 
                 2.26385586e−29 
               
               
                 C50 
                 3.20645297e−24 
                 −7.22070937e−25 
                 9.11823578e−28 
               
               
                 C52 
                 −6.68431649e−24 
                 −1.47635262e−20 
                 5.14270429e−28 
               
               
                 C54 
                 8.10978715e−23 
                 5.0776662e−18 
                 4.13766527e−28 
               
               
                 C55 
                 −8.00938486e−29 
                 2.30519335e−31 
                 1.16666839e−29 
               
               
                 C57 
                 −4.31210476e−28 
                 5.98498871e−29 
                 −1.67242338e−29 
               
               
                 C59 
                 1.263643e−27 
                 −2.81679351e−27 
                 −1.76007666e−30 
               
               
                 C61 
                 1.612983e−26 
                 3.572795e−24 
                 −2.19437814e−30 
               
               
                 C63 
                 2.7883773e−25 
                 −5.88261071e−22 
                 −8.93045154e−31 
               
               
                 C65 
                 1.0678073e−24 
                 −1.29361634e−19 
                 3.33090397e−32 
               
               
                 C67 
                 4.23448748e−31 
                 −5.49562737e−33 
                 −4.02324014e−34 
               
               
                 C69 
                 6.71940992e−30 
                 −4.72770157e−30 
                 −6.06669725e−33 
               
               
                 C71 
                 −5.19192758e−29 
                 −1.4523395e−27 
                 −5.05696725e−33 
               
               
                 C73 
                 1.0131755e−29 
                 −1.68084682e−25 
                 −2.25708995e−34 
               
               
                 C75 
                 −3.04215249e−27 
                 −8.27631336e−24 
                 9.90529604e−34 
               
               
                 C77 
                 −9.47988848e−27 
                 −6.68913918e−21 
                 1.03314337e−33 
               
               
                 C78 
                 1.37830298e−34 
                 3.39532895e−38 
                 −3.00501581e−35 
               
               
                 C80 
                 −2.20614706e−33 
                 2.60606795e−34 
                 3.47983183e−35 
               
               
                 C82 
                 −1.55885934e−32 
                 1.18728779e−31 
                 9.0614728e−36 
               
               
                 C84 
                 2.36759125e−31 
                 −9.90754189e−30 
                 6.42501344e−36 
               
               
                 C86 
                 −8.92393833e−31 
                 −2.12722713e−27 
                 2.44225001e−36 
               
               
                 C88 
                 1.11751611e−29 
                 2.57988212e−25 
                 −1.1318051e−36 
               
               
                 C90 
                 1.68895246e−29 
                 −6.02795443e−23 
                 −1.48883018e−36 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
             
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 3C 
               
             
             
               
                   
               
               
                 for Figure 22/23 
               
             
          
           
               
                   
                 Coefficient 
                 M2 
                 M1 
               
               
                   
                   
               
             
          
           
               
                   
                 KY 
                 0.00000000 
                 0.00000000 
               
               
                   
                 KX 
                 0.00000000 
                 0.00000000 
               
               
                   
                 RX 
                 −6051.13629900 
                 −7070.71042700 
               
               
                   
                 C7  
                 5.13565486e−08 
                 −5.53709138e−08 
               
               
                   
                 C9  
                 8.48166415e−08 
                 −2.81784911e−08 
               
               
                   
                 C10 
                 −7.13439177e−11 
                 1.35470045e−11 
               
               
                   
                 C12 
                 −6.78217449e−11 
                 2.22349088e−12 
               
               
                   
                 C14 
                 1.07389017e−10 
                 −2.17100764e−11 
               
               
                   
                 C16 
                 9.40090645e−14 
                 −9.25413819e−14 
               
               
                   
                 C18 
                 4.12391946e−14 
                 −1.96114428e−13 
               
               
                   
                 C20 
                 1.58260544e−13 
                 1.03943487e−13 
               
               
                   
                 C21 
                 3.47522486e−18 
                 1.82335443e−17 
               
               
                   
                 C23 
                 6.4536786e−17  
                 −9.18926095e−17 
               
               
                   
                 C25 
                 −9.48899205e−17 
                 1.8538804e−16 
               
               
                   
                 C27 
                 2.49339094e−16 
                 −1.11389293e−16 
               
               
                   
                 C29 
                 5.35403925e−20 
                 1.8436518e−20 
               
               
                   
                 C31 
                 7.5637834e−20 
                 1.96646409e−19 
               
               
                   
                 C33 
                 −3.4158977e−20 
                 −9.81835487e−20 
               
               
                   
                 C35 
                 4.85861223e−19 
                 1.66148938e−20 
               
               
                   
                 C36 
                 −4.94601583e−23 
                 −7.08072737e−23 
               
               
                   
                 C38 
                 −4.05348385e−23 
                 −4.11801448e−22 
               
               
                   
                 C40 
                 −1.32203024e−22 
                 −3.45175171e−22 
               
               
                   
                 C42 
                 −4.03609525e−22  
                 2.73466405e−21 
               
               
                   
                 C44 
                 1.11739328e−21 
                 2.14025934e−21 
               
               
                   
                 C46 
                 4.93708892e−25 
                 −4.4788586e−25 
               
               
                   
                 C48 
                 8.43130272e−25 
                 −2.07813692e−24 
               
               
                   
                 C50 
                 3.73873009e−25 
                 −1.03853204e−24 
               
               
                   
                 C52 
                 −6.68290603e−25 
                 8.00799065e−24 
               
               
                   
                 C54 
                 2.70267769e−24  
                 8.41515359e−24 
               
               
                   
                 C55 
                 7.69118669e−28  
                 1.51282519e−28 
               
               
                   
                 C57 
                 −6.45916145e−28 
                 3.17074481e−27 
               
               
                   
                 C59 
                 −2.33699309e−27 
                 1.22333041e−26 
               
               
                   
                 C61 
                 −1.59593012e−27 
                 2.79500485e−26 
               
               
                   
                 C63 
                 −1.26314552e−27 
                 3.67365838e−26 
               
               
                   
                 C65 
                 6.27135853e−27 
                 6.16865377e−27 
               
               
                   
                 C67 
                 −4.95148641e−31 
                 9.10808295e−31 
               
               
                   
                 C69 
                 −1.46516796e−30 
                 1.89542207e−29 
               
               
                   
                 C71 
                 −4.91881917e−31 
                 3.64294099e−29 
               
               
                   
                 C73 
                 5.75845525e−30  
                 1.8163786e−28 
               
               
                   
                 C75 
                 3.15049294e−30 
                 1.86166005e−28 
               
               
                   
                 C77 
                 1.11362439e−29  
                 6.30936726e−29 
               
               
                   
                 C78 
                 −5.94716839e−33 
                 2.0215274e−34 
               
               
                   
                 C80 
                 8.05983005e−33 
                 −1.50601813e−32 
               
               
                   
                 C82 
                 1.4626007e−32 
                 −7.53087591e−32 
               
               
                   
                 C84 
                 5.40117622e−33 
                 −9.52174202e−32 
               
               
                   
                 C86 
                 3.4651056e−33 
                 3.12650323e−31 
               
               
                   
                 C88 
                 1.81935676e−34  
                 1.56079676e−30 
               
               
                   
                 C90 
                 8.55586176e−33 
                 −9.50142408e−31 
               
               
                   
                   
               
             
          
         
       
     
         [0000]    
       
         
               
             
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 4A 
               
             
             
               
                   
               
               
                 for Figure 22/23 
               
             
          
           
               
                 Surface 
                 DCX 
                 DCY 
                 DCZ 
               
               
                   
               
             
          
           
               
                 Image plane 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 M8 
                 0.00000000 
                 0.43487770 
                 929.54103257 
               
               
                 M7 
                 0.00000000 
                 −195.16970097 
                 122.97869898 
               
               
                 M6 
                 0.00000000 
                 111.85985762 
                 1489.32638973 
               
               
                 M5 
                 0.00000000 
                 410.81949788 
                 1904.78959323 
               
               
                 M4 
                 0.00000000 
                 992.15730872 
                 2222.31723561 
               
               
                 M3 
                 0.00000000 
                 −482.56707270 
                 1729.00568653 
               
               
                 M2 
                 0.00000000 
                 −1585.17397046 
                 981.97338980 
               
               
                 Stop 
                 0.00000000 
                 −1727.72829897 
                 783.13904832 
               
               
                 M1 
                 0.00000000 
                 −2266.52701125 
                 58.05513346 
               
               
                 Object plane 
                 0.00000000 
                 −2431.23130607 
                 1600.02829943 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
             
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 4B 
               
             
             
               
                   
               
               
                 for Figure 22/23 
               
             
          
           
               
                 Surface 
                 TLA [deg] 
                 TLB [deg] 
                 TLC [deg] 
               
               
                   
               
             
          
           
               
                 Image plane 
                 −0.00000000 
                 0.00000000 
                 −0.00000000 
               
               
                 M8 
                 −6.81330581 
                 0.00000000 
                 −0.00000000 
               
               
                 M7 
                 166.92645295 
                 0.00000000 
                 −0.00000000 
               
               
                 M6 
                 65.44761820 
                 0.00000000 
                 −0.00000000 
               
               
                 M5 
                 41.17768289 
                 0.00000000 
                 −0.00000000 
               
               
                 M4 
                 −66.32591576 
                 0.00000000 
                 −0.00000000 
               
               
                 M3 
                 26.39370949 
                 0.00000000 
                 −0.00000000 
               
               
                 M2 
                 43.84283645 
                 0.00000000 
                 −0.00000000 
               
               
                 Stop 
                 16.95641469 
                 0.00000000 
                 −0.00000000 
               
               
                 M1 
                 164.87624817 
                 0.00000000 
                 −0.00000000 
               
               
                 Object plane 
                 0.14372063 
                 0.00000000 
                 −0.00000000 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 5 for FIG. 22/23 
               
               
                   
               
               
                   
                 Surface 
                 Angle of incidence [deg] 
                 Reflectivity 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                   
                 M8 
                 6.78879174 
                 0.66081702 
               
               
                   
                 M7 
                 0.47469061 
                 0.66566222 
               
               
                   
                 M6 
                 78.06166814 
                 0.85171082 
               
               
                   
                 M5 
                 77.64639609 
                 0.84568699 
               
               
                   
                 M4 
                 5.02606661 
                 0.66309175 
               
               
                   
                 M3 
                 82.39990131 
                 0.90859365 
               
               
                   
                 M2 
                 79.98727228 
                 0.87813250 
               
               
                   
                 M1 
                 21.23546659 
                 0.60543423 
               
               
                   
                 Overall transmission 
                   
                 0.1015 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
             
               
               
               
             
           
               
                 TABLE 6 for FIG. 22/23 
               
               
                   
               
               
                 X[mm] 
                 Y[mm] 
                 Z[mm] 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 0.00000000 
                 −103.18045715 
                 0.00000000 
               
               
                 −38.19587382 
                 −101.80911486 
                 0.00000000 
               
               
                 −75.61417532 
                 −97.73837268 
                 0.00000000 
               
               
                 −111.48060482 
                 −91.09640307 
                 0.00000000 
               
               
                 −145.02805526 
                 −82.09029073 
                 0.00000000 
               
               
                 −175.50222111 
                 −70.99475403 
                 0.00000000 
               
               
                 −202.17051799 
                 −58.13708869 
                 0.00000000 
               
               
                 −224.33612423 
                 −43.88214370 
                 0.00000000 
               
               
                 −241.35841193 
                 −28.62051048 
                 0.00000000 
               
               
                 −252.67986085 
                 −12.76035334 
                 0.00000000 
               
               
                 −257.85795356 
                 3.27889145 
                 0.00000000 
               
               
                 −256.59867271 
                 19.07356199 
                 0.00000000 
               
               
                 −248.78648356 
                 34.20626311 
                 0.00000000 
               
               
                 −234.50514232 
                 48.28188025 
                 0.00000000 
               
               
                 −214.04516542 
                 60.94874828 
                 0.00000000 
               
               
                 −187.89688337 
                 71.92090722 
                 0.00000000 
               
               
                 −156.73117956 
                 80.99526522 
                 0.00000000 
               
               
                 −121.37190551 
                 88.05708287 
                 0.00000000 
               
               
                 −82.76429617 
                 93.07042816 
                 0.00000000 
               
               
                 −41.94278561 
                 96.05359314 
                 0.00000000 
               
               
                 −0.00000000 
                 97.04230242 
                 −0.00000000 
               
               
                 41.94278561 
                 96.05359314 
                 0.00000000 
               
               
                 82.76429617 
                 93.07042816 
                 −0.00000000 
               
               
                 121.37190551 
                 88.05708287 
                 0.00000000 
               
               
                 156.73117956 
                 80.99526522 
                 −0.00000000 
               
               
                 187.89688337 
                 71.92090722 
                 0.00000000 
               
               
                 214.04516542 
                 60.94874828 
                 −0.00000000 
               
               
                 234.50514232 
                 48.28188025 
                 0.00000000 
               
               
                 248.78648356 
                 34.20626311 
                 0.00000000 
               
               
                 256.59867271 
                 19.07356199 
                 0.00000000 
               
               
                 257.85795356 
                 3.27889145 
                 0.00000000 
               
               
                 252.67986085 
                 −12.76035334 
                 0.00000000 
               
               
                 241.35841193 
                 −28.62051048 
                 0.00000000 
               
               
                 224.33612423 
                 −43.88214370 
                 0.00000000 
               
               
                 202.17051799 
                 −58.13708869 
                 0.00000000 
               
               
                 175.50222111 
                 −70.99475403 
                 0.00000000 
               
               
                 145.02805526 
                 −82.09029073 
                 0.00000000 
               
               
                 111.48060482 
                 −91.09640307 
                 0.00000000 
               
               
                 75.61417532 
                 −97.73837268 
                 0.00000000 
               
               
                 38.19587382 
                 −101.80911486 
                 0.00000000 
               
               
                   
               
             
          
         
       
     
         [0378]    An overall reflectivity of the projection optical unit  35  is 10.15%. 
         [0379]    The projection optical unit  35  has an image-side numerical aperture of 0.49. The image field  8  has an x-extent of two times 13 mm and a y-extent of 1.20 mm. The projection optical unit  35  is optimized for an operating wavelength of the illumination light  3  of 13.5 nm. 
         [0380]    The projection optical unit  35  has exactly eight mirrors M 1  to M 8 . The mirrors M 2  and M 3  on the one hand, and M 5 , M 6  on the other hand are embodied as mirrors for grazing incidence and are arranged in each case as a mirror pair directly behind one another in the imaging beam path. The projection optical unit  35  has exactly four mirrors for grazing incidence, namely the mirrors M 2 , M 3 , M 5  and M 6 . The mirrors M 1 , M 4 , M 7  and M 8  are embodied as mirrors for normal incidence. 
         [0381]    In the projection optical unit  35 , a stop  18  is arranged in the beam path between the mirrors M 1  and M 2 , near the grazing incidence on the mirror M 2 . Alternatively or additionally, a stop can be arranged directly on the surface of the mirror M 2 . 
         [0382]    An angle of incidence of the chief rays  16  in the object plane  5  is 6.3°. 
         [0383]    In the meridional section according to  FIG. 22 , the chief rays extend between the object field  4  and the mirror M 1  in a divergent manner. In the yz-plane, an entrance pupil of the projection optical unit  35  lies approximately −6640 mm in front of the object field  4  in the beam path of the illumination light. In the xz-plane (cf.  FIG. 23 ), the entrance pupil lies approximately 2750 mm after the object field in the imaging beam path of the projection optical unit  35 . The mirror M 8  defines an image-side obscuration which is less than 15% of the image-side numerical aperture of the projection optical unit  35  in the x-dimension. 
         [0384]    In the xz-section (cf.  FIG. 23 ), the stop  18  can lie at a position displaced in the z-direction compared to its position in the yz-section. 
         [0385]    A z-distance between the object field  4  and the image field  8  is approximately 1600 mm. 
         [0386]    An object/image offset (d OIS ) is approximately 2430 mm. 
         [0387]    A free working distance between the mirror M 7  and the image field  8  is 88 mm. 
         [0388]    In the projection optical unit  35 , a scanned RMS value for the wavefront aberration is at most 10 mλ and, on average, 7 mλ. 
         [0389]    A maximum distortion value is at most 0.27 nm in the x-direction and at most 0.17 nm in the y-direction. A telecentricity value in the x-direction is at most 0.01 mrad on the image field-side and a telecentricity value in the y-direction is at most 0.06 mrad on the image field-side. 
         [0390]    Further mirror data emerge from the following table. 
         [0000]    
       
         
               
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
               
             
           
               
                   
                 TABLE 7 for FIG. 22/23 
               
               
                   
                   
               
               
                   
                 M1 
                 M2 
                 M3 
                 M4 
                 M5 
                 M6 
                 M7 
                 M8 
               
               
                   
                   
               
             
             
               
                   
               
             
          
           
               
                 Maximum angle of incidence [deg] 
                 21.6 
                 82.4 
                 82.8 
                 7.4 
                 80.1 
                 81.4 
                 14.8 
                 8.5 
               
               
                 Mirror extent (x) [mm] 
                 427.1 
                 563.6 
                 810.3 
                 985.6 
                 705.3 
                 352.4 
                 414.1 
                 951.7 
               
               
                 Mirror extent (y) [mm] 
                 286.3 
                 514.2 
                 1144.8 
                 52.4 
                 219.4 
                 367.8 
                 248.0 
                 928.2 
               
               
                 Maximum mirror diameter [mm] 
                 427.5 
                 569.8 
                 1172.5 
                 985.6 
                 705.3 
                 390.7 
                 414.3 
                 951.9 
               
               
                   
               
             
          
         
       
     
         [0391]    There is an intermediate image  19  in the beam path in the region of a reflection on the mirror M 5  in the yz-plane ( FIG. 22 ) and in the imaging beam path region between the mirrors M 6  and M 7  in the xz-plane ( FIG. 23 ). 
         [0392]    The mirror M 8  is obscured and includes a passage opening  17  for the passage of the illumination light  3  in the imaging beam path between the mirrors M 6  and M 7 . A value for the obscuration is 15%. 
         [0393]    Only the last mirror M 8  in the imaging beam path includes a passage opening  17  for the imaging light  3 . All other mirrors M 1  to M 7  have a continuous reflection surface. The reflection surface of the mirror M 8  is used around the passage opening  17  thereof. 
         [0394]    The mirrors M 1 , M 3 , M 4 , M 5  and M 8  have negative values for the radius, i.e. are, in principle, concave mirrors. The other mirrors M 2 , M 6  and M 7  have positive values for the radius, i.e. are, in principle, convex mirrors. The mirrors M 2 , M 3 , M 5  and M 6  for grazing incidence have very large radii and only constitute small deviations from plane reflection surfaces. 
         [0395]    A further embodiment of a projection optical unit  36 , which can be used in the projection exposure apparatus  1  according to  FIG. 1  instead of e.g. the projection optical unit  7 , is explained in the following text on the basis of  FIGS. 24 and 25 . Components and functions which were already explained above in the context of  FIGS. 1 to 23  are appropriately denoted by the same reference signs and are not discussed again in detail.  FIG. 24  shows a meridional section of the projection optical unit  36 .  FIG. 25  shows a sagittal view of the projection optical unit  36 . 
         [0396]    The projection optical unit  36  has a total of 8 mirrors M 1  to M 8  and, in terms of the basic design thereof, it is similar to e.g. the projection optical unit  7  according to  FIG. 2 . 
         [0397]    The projection optical unit  36  is embodied as anamorphic optical unit. In the yz-section according to  FIG. 24 , the projection optical unit  36  has a reducing imaging scale β y  of 6.00. In the xz-plane (cf.  FIG. 25 ) perpendicular thereto, the projection optical unit  36  has a reducing imaging scale β x  of 5.40. 
         [0398]    These different imaging scales β x , β y  lead to an object-side numerical aperture being smaller in the yz-plane than in the xz-plane, as emerges from comparison between  FIGS. 24 and 25 . As a result of this, an advantageously small chief ray angle CRAO of 6.7° is obtained in the yz-plane. 
         [0399]    The anamorphic effect of the projection optical unit  36  is distributed to all optical surfaces of the mirrors M 1  to M 8 . 
         [0400]    The mirrors M 1  to M 8  are once again embodied as free-form surface mirrors, for which the free-form surface equation (1), specified above, applies. The optical design data from the projection optical unit  36  can be gathered from the following tables, which, in terms of their design, correspond to the tables for the projection optical unit  7  according to  FIG. 2 . 
         [0000]    
       
         
               
               
               
             
               
               
               
               
             
               
               
               
             
           
               
                 TABLE 1 for FIG. 24/25 
               
               
                   
               
               
                   
                 Exemplary embodiment 
                 FIG. 24/25 
               
               
                   
               
             
             
               
                   
                 NA 
                 0.5 
               
             
          
           
               
                   
                 Wavelength 
                 13.5 
                 nm 
               
               
                   
                 Field dimension x 
                 26.0 
                 mm 
               
               
                   
                 Field dimension y 
                 1.2 
                 mm 
               
               
                   
                 Field curvature 
                 0.0 
                 1/mm 
               
             
          
           
               
                   
                 Stop 
                 S9 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
               
               
             
               
               
               
               
               
               
             
           
               
                 TABLE 2 for FIG. 24/25 
               
               
                   
               
               
                 Surface 
                 Radius x[mm] 
                 Power x[1/mm] 
                 Radius y[mm] 
                 Power y[1/mm] 
                 Operating 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 M8 
                 −898.65384451 
                 0.00220986 
                 −841.56029276 
                 0.00239341 
                 REFL 
               
               
                 M7 
                 2519.21415981 
                 −0.00079387 
                 549.64538748 
                 −0.00363883 
                 REFL 
               
               
                 M6 
                 5235.46738689 
                 −0.00007321 
                 18583.02763769 
                 −0.00056159 
                 REFL 
               
               
                 M5 
                 10320.35903473 
                 −0.00004533 
                 7043.08337008 
                 −0.00121403 
                 REFL 
               
               
                 M4 
                 −2368.58450824 
                 0.00084156 
                 −1677.61856878 
                 0.00119617 
                 REFL 
               
               
                 M3 
                 — 
                 0.00001752 
                 — 
                 0.00044930 
                 REFL 
               
               
                 M2 
                 −3162.96579252 
                 0.00011478 
                 6044.71230342 
                 −0.00182278 
                 REFL 
               
               
                 M1 
                 — 
                 0.00005542 
                 −1659.85010449 
                 0.00128773 
                 REFL 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
             
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 3A 
               
             
             
               
                   
               
               
                 for Figure 24/25 
               
             
          
           
               
                 Coefficient 
                 M8 
                 M7 
                 M6 
               
               
                   
               
             
          
           
               
                 KY 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 KX 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 RX 
                 −898.65384450  
                 2519.21416000 
                 5235.46738700 
               
               
                 C7  
                 −3.09391603e−08 
                 −1.79559389e−07 
                 1.24390263e−08 
               
               
                 C9  
                 −7.26824159e−09 
                 6.05374011e−08 
                 1.79529464e−08 
               
               
                 C10  
                 −9.17661523e−12 
                 7.52464303e−10 
                 7.73452408e−11 
               
               
                 C12  
                 −2.9215991e−11 
                 2.51411627e−09 
                 5.01854597e−11 
               
               
                 C14  
                 −1.54578064e−11 
                 1.71853031e−09  
                 1.59214758e−11 
               
               
                 C16  
                 −3.78292895e−14 
                 −1.78811844e−12 
                 −1.78827188e−13 
               
               
                 C18  
                 −3.15725802e−14 
                 −3.28279723e−12  
                 1.1629587e−13 
               
               
                 C20  
                 −3.25627497e−15 
                 1.74708334e−12 
                 2.90732297e−14 
               
               
                 C21  
                 −2.16930672e−17 
                 1.21979378e−16 
                 −1.17216554e−16 
               
               
                 C23  
                 −7.40935074e−17 
                 8.73459133e−15 
                 6.3593323e−16 
               
               
                 C25  
                 −8.27264393e−17 
                 2.78760075e−14 
                 3.63957206e−16 
               
               
                 C27  
                 −2.47378025e−17 
                 7.97309374e−15 
                 4.64399505e−17 
               
               
                 C29  
                 −4.00833778e−20 
                 3.04883362e−18 
                 1.20940283e−18 
               
               
                 C31  
                 −6.74348668e−20 
                 1.05351029e−17 
                 −7.33386432e−19 
               
               
                 C33  
                 −3.33712007e−20 
                 −2.53301039e−17 
                 1.04598017e−18 
               
               
                 C35  
                 −1.60060561e−21 
                 5.51279308e−18 
                 3.15382288e−20 
               
               
                 C36  
                 −3.38618723e−23 
                 1.09644503e−20 
                 2.10543991e−21 
               
               
                 C38  
                 −1.52108183e−22 
                 5.20557325e−20 
                 −7.17116902e−21 
               
               
                 C40  
                 −2.50184393e−22 
                 9.91293267e−20 
                 1.9344533e−21 
               
               
                 C42  
                 −1.55242331e−22 
                 4.49100492e−20 
                 5.1810958e−21 
               
               
                 C44  
                 −3.21754195e−23 
                 6.12504902e−20 
                 4.00057253e−22 
               
               
                 C46  
                 −2.56622324e−26 
                 −2.34811653e−23 
                 −2.20054661e−23 
               
               
                 C48  
                 −7.12044814e−26 
                 −1.38827791e−22 
                 2.11379653e−23 
               
               
                 C50  
                 −8.35229848e−26 
                 −2.27120568e−22 
                 4.24710944e−24 
               
               
                 C52  
                 −3.25877822e−26 
                 1.63931776e−21 
                 2.81218781e−23 
               
               
                 C54  
                 2.31523308e−27 
                 2.29596466e−21 
                 4.11520106e−24 
               
               
                 C55  
                 −3.22044427e−29 
                 −8.38570398e−26 
                 −3.16289259e−26 
               
               
                 C57  
                 −9.9283758e−29 
                 −3.98833111e−25 
                 7.96014291e−26 
               
               
                 C59  
                 −1.59623677e−28 
                 4.49981655e−25 
                 −2.36125333e−26 
               
               
                 C61  
                 −2.26350041e−28 
                 4.86885671e−24 
                 2.20987927e−26 
               
               
                 C63  
                 −2.16360896e−28 
                 4.81078139e−24  
                 9.17694081e−26 
               
               
                 C65  
                 −7.19034294e−29 
                 3.12706869e−24 
                 1.70276521e−26 
               
               
                 C67  
                 −1.66086944e−31 
                 −1.00921794e−28 
                 1.20992206e−28 
               
               
                 C69  
                 −7.09674851e−31 
                 2.62297907e−28 
                 −3.33093899e−28 
               
               
                 C71  
                 −1.00405146e−30 
                 1.59366409e−27  
                 7.45906143e−29 
               
               
                 C73  
                 −4.84392005e−31 
                 6.24841362e−27 
                 −1.78519939e−28 
               
               
                 C75  
                 1.6840288e−32  
                 9.81013953e−27 
                 1.67183371e−28 
               
               
                 C77  
                 5.33123321e−32 
                 −2.64352603e−26 
                 3.33232457e−29 
               
               
                 C78  
                 −7.76624666e−35 
                 7.70090407e−31 
                 2.36244673e−31 
               
               
                 C80  
                 −1.37504248e−33 
                 7.418665e−30 
                 3.27117525e−31 
               
               
                 C82  
                 −4.9730902e−33 
                 1.12937368e−29  
                 1.58945015e−30 
               
               
                 C84  
                 −6.93445436e−33 
                 −2.16643844e−29 
                 −1.71056833e−30 
               
               
                 C86  
                 −4.05050995e−33 
                 −1.48561291e−28 
                 −4.22081835e−31 
               
               
                 C88  
                 −7.44238878e−34 
                 −3.70834394e−28  
                 1.38420773e−31 
               
               
                 C90  
                 8.08789051e−35 
                 −3.48344195e−28 
                 2.57211573e−32 
               
               
                 C92  
                 3.79975278e−37 
                 0 
                 0 
               
               
                 C94  
                 2.54205485e−36 
                 0 
                 0 
               
               
                 C96  
                 5.28074116e−36 
                 0 
                 0 
               
               
                 C98  
                 4.78458863e−36 
                 0 
                 0 
               
               
                 C100 
                 1.78186461e−36 
                 0 
                 0 
               
               
                 C102 
                 1.09169331e−38 
                 0 
                 0 
               
               
                 C104 
                 −1.69802736e−37 
                 0 
                 0 
               
               
                 C105 
                 −3.93526201e−41 
                 0 
                 0 
               
               
                 C107 
                 3.66634759e−39 
                 0 
                 0 
               
               
                 C109 
                 1.99100717e−38 
                 0 
                 0 
               
               
                 C111 
                 3.88960174e−38 
                 0 
                 0 
               
               
                 C113 
                 3.36275392e−38 
                 0 
                 0 
               
               
                 C115 
                 1.23397826e−38 
                 0 
                 0 
               
               
                 C117 
                 5.74500356e−40 
                 0 
                 0 
               
               
                 C119 
                 −5.43216154e−40 
                 0 
                 0 
               
               
                 C121 
                 −8.13063603e−43 
                 0 
                 0 
               
               
                 C123 
                 −6.57853328e−42 
                 0 
                 0 
               
               
                 C125 
                 −1.84219693e−41 
                 0 
                 0 
               
               
                 C127 
                 −2.4128622e−41 
                 0 
                 0 
               
               
                 C129 
                 −1.58805249e−41 
                 0 
                 0 
               
               
                 C131 
                 −4.8328677e−42 
                 0 
                 0 
               
               
                 C133 
                 −1.37774875e−44 
                 0 
                 0 
               
               
                 C135 
                 3.70992132e−43 
                 0 
                 0 
               
               
                 C136 
                 −1.82426978e−46 
                 0 
                 0 
               
               
                 C138 
                 −8.82948521e−45 
                 0 
                 0 
               
               
                 C140 
                 −5.13522224e−44 
                 0 
                 0 
               
               
                 C142 
                 −1.2576407e−43 
                 0 
                 0 
               
               
                 C144 
                 −1.54936749e−43 
                 0 
                 0 
               
               
                 C146 
                 −1.00539254e−43 
                 0 
                 0 
               
               
                 C148 
                 −3.21138841e−44 
                 0 
                 0 
               
               
                 C150 
                 −2.48902466e−45 
                 0 
                 0 
               
               
                 C152 
                 8.34369753e−46 
                 0 
                 0 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
             
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 3B 
               
             
             
               
                   
               
               
                 for Figure 24/25 
               
             
          
           
               
                 Coefficient 
                 M5 
                 M4 
                 M3 
               
               
                   
               
             
          
           
               
                 KY 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 KX 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 RX 
                 10320.35903000 
                 −2368.58450800 
                 −14606.85238000 
               
               
                 C7  
                 −9.43984452e−08 
                 −3.19780054e−08 
                 3.42335843e−09 
               
               
                 C9  
                 −3.73977119e−08 
                 −1.20873717e−08 
                 5.71457986e−09 
               
               
                 C10 
                 2.4885219e−11  
                 3.51515054e−13 
                 −2.7196639e−11 
               
               
                 C12 
                 3.31374515e−11 
                 3.35936518e−11 
                 −8.28556705e−12 
               
               
                 C14 
                 1.23001091e−10 
                 −4.20689147e−10 
                 −4.37520677e−12 
               
               
                 C16 
                 9.60921501e−14 
                 6.35312252e−16 
                 3.97165731e−14 
               
               
                 C18 
                 3.06969842e−14 
                 −2.04642026e−13 
                 4.6038851e−16 
               
               
                 C20 
                 −1.81914837e−13 
                 1.42057888e−12 
                 4.04652695e−15 
               
               
                 C21 
                 −1.50139489e−16  
                 3.20784131e−18  
                 −6.41123154e−17 
               
               
                 C23 
                 −3.67530123e−16 
                 −1.59859373e−17 
                 −6.98459168e−18 
               
               
                 C25 
                 −5.85422242e−16  
                 5.10844386e−16 
                 −6.91809193e−18 
               
               
                 C27 
                 5.96794634e−16 
                 −8.63505265e−15  
                 −3.65944728e−18 
               
               
                 C29 
                 8.05074272e−19 
                 9.21434731e−21 
                 6.08393666e−20 
               
               
                 C31 
                 9.67423637e−19 
                 −6.41403775e−20 
                 1.32184653e−20 
               
               
                 C33 
                 2.74697274e−18 
                 −3.17400432e−18 
                 5.64881549e−21 
               
               
                 C35 
                 −2.10574097e−18 
                 −5.68113418e−18 
                 4.62810551e−21 
               
               
                 C36 
                 −4.19331352e−22 
                 5.4673575e−24  
                 −1.20159738e−22 
               
               
                 C38 
                 −1.48291097e−21 
                 −5.66829369e−23 
                 9.99813448e−24 
               
               
                 C40 
                 −8.89078399e−23 
                 3.3289796e−21 
                 −1.51187874e−24 
               
               
                 C42 
                 −1.30043929e−20 
                 2.13230879e−20 
                 2.57105484e−24 
               
               
                 C44 
                 −5.61941157e−23 
                 1.28852422e−18 
                 −2.83232079e−24 
               
               
                 C46 
                 1.22910541e−24 
                 −3.93269304e−26 
                 −8.4259963e−26 
               
               
                 C48 
                 2.63475255e−25 
                 1.29025934e−24 
                 −6.73035076e−27 
               
               
                 C50 
                 −1.61930052e−24 
                 9.58130418e−23 
                 −2.23952211e−26 
               
               
                 C52 
                 9.54851986e−23 
                 −6.49564266e−22 
                 −3.32643796e−26 
               
               
                 C54 
                 6.18740883e−23 
                 2.13466405e−20 
                 −1.30243029e−26 
               
               
                 C55 
                 −1.88937216e−28 
                 4.62453335e−30 
                 4.32699323e−29 
               
               
                 C57 
                 7.92134564e−27 
                 −6.42166267e−28 
                 2.58106954e−28 
               
               
                 C59 
                 −3.81767476e−26 
                 −3.40516712e−27 
                 −1.33435452e−28 
               
               
                 C61 
                 −7.40042015e−26  
                 1.13636915e−25 
                 −1.31816559e−28 
               
               
                 C63 
                 −5.91737902e−25 
                 −2.28464211e−23 
                 −6.13175237e−30 
               
               
                 C65 
                 −5.90657031e−26  
                 3.90274961e−23 
                 −7.57941398e−30 
               
               
                 C67 
                 −4.71910372e−30 
                 −4.00537288e−32 
                 −3.78181987e−31 
               
               
                 C69 
                 −3.80842075e−29  
                 9.29769453e−31 
                 3.15234014e−32 
               
               
                 C71 
                 3.45306237e−28 
                 −9.14633256e−28 
                 6.81155634e−31 
               
               
                 C73 
                 4.06923505e−28 
                 −7.07463203e−27 
                 3.52501713e−31 
               
               
                 C75 
                 1.89818188e−27 
                 3.11226568e−25 
                 4.51613912e−31 
               
               
                 C77 
                 −1.59359386e−27 
                 −1.02694094e−23 
                 8.58516649e−32 
               
               
                 C78 
                 5.39005499e−34 
                 7.60475402e−36 
                 5.47282581e−35 
               
               
                 C80 
                 1.28802722e−32 
                 1.82429692e−33 
                 2.22708016e−34 
               
               
                 C82 
                 8.88526683e−32 
                 −1.0368376e−31 
                 −5.0870717e−34 
               
               
                 C84 
                 −1.07852034e−30 
                 −7.6912987e−30 
                 −3.01511969e−34 
               
               
                 C86 
                 8.12932285e−32 
                 7.77307244e−29 
                 −6.5410886e−34 
               
               
                 C88 
                 −2.93141855e−30 
                 2.55070847e−27 
                 −5.55696921e−34 
               
               
                 C90 
                 4.98139974e−30 
                 −9.99949267e−26 
                 −6.9232932e−35 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
             
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 3C 
               
             
             
               
                   
               
               
                 for Figure 24/25 
               
             
          
           
               
                   
                 Coefficient 
                 M2 
                 M1 
               
               
                   
                   
               
             
          
           
               
                   
                 KY 
                 0.00000000 
                 0.00000000 
               
               
                   
                 KX 
                 0.00000000 
                 0.00000000 
               
               
                   
                 RX 
                 −3162.96579300 
                 −33768.32491000 
               
               
                   
                 C7  
                 −5.63006995e−09 
                 −1.85162177e−07 
               
               
                   
                 C9  
                 2.52603119e−08 
                 −5.82002845e−08 
               
               
                   
                 C10 
                 −1.63939568e−10 
                 2.19843459e−11 
               
               
                   
                 C12 
                 −1.45434544e−10 
                 4.34395623e−12 
               
               
                   
                 C14 
                 3.07914787e−11 
                 −3.90398966e−11 
               
               
                   
                 C16 
                 1.19978873e−13 
                 −4.02854058e−13 
               
               
                   
                 C18 
                 2.91665979e−14 
                 −3.53269108e−13 
               
               
                   
                 C20 
                 7.14507418e−14 
                 −8.06536713e−14 
               
               
                   
                 C21 
                 −1.26157584e−16 
                 1.50658497e−16 
               
               
                   
                 C23 
                 −7.76330156e−17 
                 1.09978734e−17 
               
               
                   
                 C25 
                 −1.72160645e−16 
                 −2.64878411e−16 
               
               
                   
                 C27 
                 1.30511683e−16 
                 −9.7675593e−17 
               
               
                   
                 C29 
                 4.97077758e−19 
                 1.94104108e−19 
               
               
                   
                 C31 
                 7.3469712e−19 
                 2.13721124e−19 
               
               
                   
                 C33 
                 −1.6248826e−19 
                 −1.17732749e−18 
               
               
                   
                 C35 
                 2.44811103e−19 
                 3.66216487e−19 
               
               
                   
                 C36 
                 2.74716093e−22 
                 −1.46887345e−21 
               
               
                   
                 C38 
                 −4.42878488e−22 
                 −2.52169606e−21 
               
               
                   
                 C40 
                 4.31546413e−22 
                 −4.89313142e−21 
               
               
                   
                 C42 
                 −1.2501295e−21 
                 −3.10103922e−21 
               
               
                   
                 C44 
                 1.72029553e−22 
                 −9.49213909e−21 
               
               
                   
                 C46 
                 −1.32233821e−24 
                 7.79166706e−25 
               
               
                   
                 C48 
                 −5.97471372e−25 
                 4.56312854e−25 
               
               
                   
                 C50 
                 −1.02312238e−25  
                 7.6643113e−24 
               
               
                   
                 C52 
                 −5.04494501e−24 
                 3.67536202e−23 
               
               
                   
                 C54 
                 3.49233317e−25 
                 1.65632978e−23 
               
               
                   
                 C55 
                 −5.35422344e−27 
                 2.17389317e−26 
               
               
                   
                 C57 
                 −1.44886077e−26 
                 6.10103532e−26 
               
               
                   
                 C59 
                 −1.68015387e−26 
                 3.72656392e−26 
               
               
                   
                 C61 
                 −1.69820125e−27 
                 4.8382551e−26 
               
               
                   
                 C63 
                 −4.06228599e−27 
                 7.94819696e−26 
               
               
                   
                 C65 
                 4.73934877e−27 
                 9.99358955e−26 
               
               
                   
                 C67 
                 1.48192042e−29 
                 −5.37391586e−30 
               
               
                   
                 C69 
                 2.75293606e−29 
                 −7.66284246e−29 
               
               
                   
                 C71 
                 3.29720353e−29 
                 −4.12938667e−28 
               
               
                   
                 C73 
                 6.35559729e−29 
                 −6.45953223e−28 
               
               
                   
                 C75 
                 3.17464557e−29 
                 −8.69448659e−28 
               
               
                   
                 C77 
                 1.55333959e−29 
                 −5.55442684e−28 
               
               
                   
                 C78 
                 2.17458628e−32 
                 −1.65616708e−31 
               
               
                   
                 C80 
                 8.59099937e−32 
                 −4.90253105e−31 
               
               
                   
                 C82 
                 1.25586211e−31  
                 8.5337234e−32 
               
               
                   
                 C84 
                 1.36897347e−31 
                 9.42500117e−31 
               
               
                   
                 C86 
                 1.31238686e−31 
                 7.66948893e−31 
               
               
                   
                 C88 
                 5.58974151e−32 
                 8.26964826e−31 
               
               
                   
                 C90 
                 1.55246521e−32 
                 5.2747466e−31 
               
               
                   
                   
               
             
          
         
       
     
         [0000]    
       
         
               
             
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 4A 
               
             
             
               
                   
               
               
                 for Figure 24/25 
               
             
          
           
               
                 Surface 
                 DCX 
                 DCY 
                 DCZ 
               
               
                   
               
             
          
           
               
                 Image plane 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 M8 
                 0.00000000 
                 −1.67688632 
                 764.65279783 
               
               
                 M7 
                 0.00000000 
                 −161.54058747 
                 101.44072569 
               
               
                 M6 
                 0.00000000 
                 107.77496443 
                 1280.58144822 
               
               
                 M5 
                 0.00000000 
                 296.98597488 
                 1553.84576956 
               
               
                 M4 
                 0.00000000 
                 819.24626664 
                 1826.49875285 
               
               
                 M3 
                 0.00000000 
                 −411.29452134 
                 1414.13408128 
               
               
                 M2 
                 0.00000000 
                 −1223.76315336 
                 879.35100849 
               
               
                 Stop 
                 0.00000000 
                 −1504.18673115 
                 497.47373340 
               
               
                 M1 
                 0.00000000 
                 −1814.12306458 
                 26.60210356 
               
               
                 Object plane 
                 0.00000000  
                 −1997.79973260 
                 1636.55227043 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
             
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 4B 
               
             
             
               
                   
               
               
                 for Figure 24/25 
               
             
          
           
               
                 Surface 
                 TLA [deg] 
                 TLB [deg] 
                 TLC [deg] 
               
               
                   
               
             
          
           
               
                 Image plane 
                 −0.00000000 
                 0.00000000 
                 −0.00000000 
               
               
                 M8 
                 −6.69273798 
                 0.00000000 
                 −0.00000000 
               
               
                 M7 
                 166.94928575 
                 0.00000000 
                 −0.00000000 
               
               
                 M6 
                 66.32026554 
                 0.00000000 
                 −0.00000000 
               
               
                 M5 
                 41.57752409 
                 0.00000000 
                 −0.00000000 
               
               
                 M4 
                 −66.84946365 
                 0.00000000 
                 −0.00000000 
               
               
                 M3 
                 26.18846526 
                 0.00000000 
                 −0.00000000 
               
               
                 M2 
                 44.25467874 
                 0.00000000 
                 −0.00000000 
               
               
                 Stop 
                 7.97043789  
                 0.00000000 
                 −0.00000000 
               
               
                 M1 
                 165.88786281 
                 0.00000000 
                 −0.00000000 
               
               
                 Object plane 
                 −0.94682585 
                 0.00000000 
                 −0.00000000 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 5 for FIG. 24/25 
               
               
                   
               
               
                   
                 Surface 
                 Angle of incidence [deg] 
                 Reflectivity 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                   
                 M8 
                 6.80770562 
                 0.66078858 
               
               
                   
                 M7 
                 0.46825946 
                 0.66566251 
               
               
                   
                 M6 
                 78.95126382 
                 0.86420515 
               
               
                   
                 M5 
                 76.47302523 
                 0.82792785 
               
               
                   
                 M4 
                 4.68878693 
                 0.66344392 
               
               
                   
                 M3 
                 82.64944000 
                 0.91162945 
               
               
                   
                 M2 
                 79.54179192 
                 0.87221922 
               
               
                   
                 M1 
                 20.65816981 
                 0.60938007 
               
               
                   
                 Overall transmission 
                   
                 0.1012 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
             
               
               
               
             
           
               
                 TABLE 6 for FIG. 24/25 
               
               
                   
               
               
                 X[mm] 
                 Y[mm] 
                 Z[mm] 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 0.00000000 
                 −112.35689068 
                 0.00000000 
               
               
                 −28.34197084 
                 −110.84444041 
                 0.00000000 
               
               
                 −56.16590328 
                 −106.34781797 
                 0.00000000 
               
               
                 −82.95239148 
                 −98.98955006 
                 0.00000000 
               
               
                 −108.17910149 
                 −88.97362778 
                 0.00000000 
               
               
                 −131.31951112 
                 −76.58171221 
                 0.00000000 
               
               
                 −151.84357438 
                 −62.16431302 
                 0.00000000 
               
               
                 −169.22272201 
                 −46.12805914 
                 0.00000000 
               
               
                 −182.94128521 
                 −28.92188102 
                 0.00000000 
               
               
                 −192.51547539 
                 −11.02355542 
                 0.00000000 
               
               
                 −197.52003878 
                 7.07501300 
                 0.00000000 
               
               
                 −197.62122485 
                 24.88594680 
                 0.00000000 
               
               
                 −192.61263704 
                 41.94672857 
                 0.00000000 
               
               
                 −182.44806396 
                 57.84053853 
                 0.00000000 
               
               
                 −167.26402703 
                 72.21001749 
                 −0.00000000 
               
               
                 −147.38653025 
                 84.76311384 
                 −0.00000000 
               
               
                 −123.32070623 
                 95.27376291 
                 −0.00000000 
               
               
                 −95.72644632 
                 103.57890521 
                 −0.00000000 
               
               
                 −65.38585433 
                 109.57098767 
                 −0.00000000 
               
               
                 −33.16868503 
                 113.18678340 
                 −0.00000000 
               
               
                 −0.00000000 
                 114.39509163 
                 0.00000000 
               
               
                 33.16868503 
                 113.18678340 
                 0.00000000 
               
               
                 65.38585433 
                 109.57098767 
                 0.00000000 
               
               
                 95.72644632 
                 103.57890521 
                 0.00000000 
               
               
                 123.32070623 
                 95.27376291 
                 −0.00000000 
               
               
                 147.38653025 
                 84.76311384 
                 0.00000000 
               
               
                 167.26402703 
                 72.21001749 
                 −0.00000000 
               
               
                 182.44806396 
                 57.84053853 
                 0.00000000 
               
               
                 192.61263704 
                 41.94672857 
                 0.00000000 
               
               
                 197.62122485 
                 24.88594680 
                 0.00000000 
               
               
                 197.52003878 
                 7.07501300 
                 0.00000000 
               
               
                 192.51547539 
                 −11.02355542 
                 0.00000000 
               
               
                 182.94128521 
                 −28.92188102 
                 0.00000000 
               
               
                 169.22272201 
                 −46.12805914 
                 0.00000000 
               
               
                 151.84357438 
                 −62.16431302 
                 −0.00000000 
               
               
                 131.31951112 
                 −76.58171221 
                 0.00000000 
               
               
                 108.17910149 
                 −88.97362778 
                 0.00000000 
               
               
                 82.95239148 
                 −98.98955006 
                 −0.00000000 
               
               
                 56.16590328 
                 −106.34781797 
                 0.00000000 
               
               
                 28.34197084 
                 −110.84444041 
                 0.00000000 
               
               
                   
               
             
          
         
       
     
         [0401]    An overall reflectivity of the projection optical unit  36  is 10.11%. 
         [0402]    The projection optical unit  36  has an image-side numerical aperture of 0.50. The image field  8  has an x-extent of two times 13 mm and a y-extent of 1.20 mm. The projection optical unit  36  is optimized for an operating wavelength of the illumination light  3  of 13.5 nm. 
         [0403]    The projection optical unit  36  has exactly eight mirrors M 1  to M 8 . The mirrors M 2  and M 3  on the one hand, and M 5 , M 6  on the other hand are embodied as mirrors for grazing incidence and are arranged in each case as a mirror pair directly behind one another in the imaging beam path. The projection optical unit  36  has exactly four mirrors for grazing incidence, namely the mirrors M 2 , M 3 , M 5  and M 6 . The mirrors M 1 , M 4 , M 7  and M 8  are embodied as mirrors for normal incidence. 
         [0404]    In the projection optical unit  36 , a stop  18  is arranged in the beam path between the mirrors M 1  and M 2 , near the grazing incidence on the mirror M 2 . Alternatively or additionally, a stop can be arranged directly on the surface of the mirror M 2 . 
         [0405]    An angle of incidence of the chief rays  16  in the object plane  5  is 6.7°. 
         [0406]    In the xz-plane (cf.  FIG. 25 ), an entrance pupil of the projection optical unit  36  lies 2225 mm in front of the object field  4  in the beam path of the illumination light. In the yz-plane, the entrance pupil lies 4000 mm after the object field in the imaging beam path of the projection optical unit  36 . An extent of the chief rays  16  emanating from the object field  4  is therefore convergent both in the meridional section according to  FIG. 24  and in the view according to  FIG. 25 . The mirror M 8  defines an image-side obscuration which is less than 18% of the image-side numerical aperture of the projection optical unit  36  in the x-dimension. 
         [0407]    In the xz-section (cf.  FIG. 25 ), the stop  18  can lie at a position displaced in the z-direction compared to its position in the yz-section. 
         [0408]    A z-distance between the object field  4  and the image field  8  is approximately 1600 mm. 
         [0409]    An object/image offset (d OIS ) is approximately 2000 mm. 
         [0410]    A free working distance between the mirror M 7  and the image field  8  is 71 mm. 
         [0411]    In the projection optical unit  36 , a scanned RMS value for the wavefront aberration is at most 11 mλ and, on average, 10 mλ. 
         [0412]    A maximum distortion value is at most 0.10 nm in the x-direction and at most 0.32 nm in the y-direction. A telecentricity value in the x-direction is at most 0.61 mrad on the image field-side and a telecentricity value in the y-direction is at most 0.74 mrad on the image field-side. 
         [0413]    Further mirror data emerge from the following table. 
         [0000]    
       
         
               
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
               
             
           
               
                   
                 TABLE 7 for FIG. 24/25 
               
               
                   
                   
               
               
                   
                 M1 
                 M2 
                 M3 
                 M4 
                 M5 
                 M6 
                 M7 
                 M8 
               
               
                   
                   
               
             
             
               
                   
               
             
          
           
               
                 Maximum angle of incidence [deg] 
                 21.3 
                 83.2 
                 84.3 
                 6.2 
                 78.6 
                 81.9 
                 15.1 
                 8.3 
               
               
                 Mirror extent (x) [mm] 
                 337.8 
                 498.9 
                 706.6 
                 851.1 
                 595.2 
                 330.2 
                 321.8 
                 800.4 
               
               
                 Mirror extent (y) [mm] 
                 293.4 
                 499.9 
                 596.7 
                 91.9 
                 262.9 
                 436.4 
                 205.1 
                 782.9 
               
               
                 Maximum mirror diameter [mm] 
                 337.9 
                 529.5 
                 807.8 
                 851.2 
                 595.3 
                 442.3 
                 321.9 
                 801.2 
               
               
                   
               
             
          
         
       
     
         [0414]    There is an intermediate image  19  in the beam path in the region between the mirrors M 3  and M 4  in the yz-plane ( FIG. 24 ) and in the imaging beam path region between the mirrors M 6  and M 7  in the xz-plane ( FIG. 25 ). 
         [0415]    The mirror M 8  is obscured and includes a passage opening  17  for the passage of the illumination light  3  in the imaging beam path between the mirrors M 6  and M 7 . 
         [0416]    Only the last mirror M 8  in the imaging beam path includes a passage opening  17  for the imaging light  3 . All other mirrors M 1  to M 7  have a continuous reflection surface. The reflection surface of the mirror M 8  is used around the passage opening  17  thereof. 
         [0417]    The mirrors M 1 , M 3 , M 4  and M 8  have negative values for the radius, i.e. are, in principle, concave mirrors. The other mirrors M 2 , M 5 , M 6  and M 7  have positive values for the radius, i.e. are, in principle, convex mirrors. The mirrors M 2 , M 3 , M 5  and M 6  for grazing incidence have very large radii and only constitute small deviations from plane reflection surfaces. 
         [0418]    A further embodiment of a projection optical unit  37 , which can be used in the projection exposure apparatus  1  according to  FIG. 1  instead of e.g. the projection optical unit  7 , is explained in the following text on the basis of  FIGS. 26 and 27 . Components and functions which were already explained above in the context of  FIGS. 1 to 25  are appropriately denoted by the same reference signs and are not discussed again in detail.  FIG. 26  shows a meridional section of the projection optical unit  37 .  FIG. 27  shows a sagittal view of the projection optical unit  37 . 
         [0419]    The projection optical unit  37  has a total of 8 mirrors M 1  to M 8  and, in terms of the basic design thereof, it is similar to e.g. the projection optical unit  7  according to  FIG. 2 . 
         [0420]    The projection optical unit  37  is embodied as anamorphic optical unit. In the yz-section according to  FIG. 26 , the projection optical unit  37  has a reducing imaging scale β y  of 8.00. In the xz-plane (cf.  FIG. 27 ) perpendicular thereto, the projection optical unit  37  has a reducing imaging scale β x  of 4.00. 
         [0421]    These different imaging scales β x , β y  lead to an object-side numerical aperture being half the size in the yz-plane compared to the xz-plane, as emerges immediately from comparison between  FIGS. 26 and 27 . As a result of this, an advantageously small chief ray angle CRAO of 3.6° is obtained in the yz-plane. 
         [0422]    The anamorphic effect of the projection optical unit  37  is distributed to all optical surfaces of the mirrors M 1  to M 8 . 
         [0423]    The mirrors M 1  to M 8  are once again embodied as free-form surface mirrors, for which the free-form surface equation (1), specified above, applies. The optical design data from the projection optical unit  37  can be gathered from the following tables, which, in terms of their design, correspond to the tables for the projection optical unit  7  according to  FIG. 2 . 
         [0000]    
       
         
               
               
               
             
               
               
               
               
             
               
               
               
             
           
               
                 TABLE 1 for FIG. 26/27 
               
               
                   
               
               
                   
                 Exemplary embodiment 
                 FIG. 26/27 
               
               
                   
               
             
             
               
                   
                 NA 
                 0.45 
               
             
          
           
               
                   
                 Wavelength 
                 13.5 
                 nm 
               
               
                   
                 Field dimension x 
                 26.0 
                 mm 
               
               
                   
                 Field dimension y 
                 1.2 
                 mm 
               
               
                   
                 Field curvature 
                 0.007085 
                 1/mm 
               
             
          
           
               
                   
                 Stop 
                 S9 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
               
               
             
               
               
               
               
               
               
             
           
               
                 TABLE 2 for FIG. 26/27 
               
               
                   
               
               
                 Surface 
                 Radius x[mm] 
                 Power x[1/mm] 
                 Radius y[mm] 
                 Power y[1/mm] 
                 Operating 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 M8 
                 −1175.11369749 
                 0.00169070 
                 −952.26534854 
                 0.00211425 
                 REFL 
               
               
                 M7 
                 −3724.82086885 
                 0.00050451 
                 645.33108835 
                 −0.00329838 
                 REFL 
               
               
                 M6 
                 4206.42425174 
                 −0.00010535 
                 — 
                 0.00001879 
                 REFL 
               
               
                 M5 
                 29363.70859574 
                 −0.00001475 
                 10812.21558149 
                 −0.00085442 
                 REFL 
               
               
                 M4 
                 −2837.31613225 
                 0.00069810 
                 −1775.43828212 
                 0.00113745 
                 REFL 
               
               
                 M3 
                 14646.09252672 
                 −0.00002459 
                 20193.39993088 
                 −0.00054992 
                 REFL 
               
               
                 M2 
                 −8591.25984962 
                 0.00004428 
                 −35101.90303378 
                 0.00029955 
                 REFL 
               
               
                 M1 
                 — 
                 0.00004251 
                 −3327.73936048 
                 0.00063940 
                 REFL 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
             
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 3A 
               
             
             
               
                   
               
               
                 for Figure 26/27 
               
             
          
           
               
                 Coefficient 
                 M8 
                 M7 
                 M6 
               
               
                   
               
             
          
           
               
                 KY 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 KX 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 RX 
                 −1175.11369700 
                 −3724.82086900 
                 4206.42425200 
               
               
                 C7  
                 −1.45376933e−08 
                 1.36379606e−07 
                 −7.10374101e−08 
               
               
                 C9  
                 −1.22873208e−08 
                 −2.63387155e−08 
                 −3.11941218e−08 
               
               
                 C10  
                 −2.1470539e−11 
                 3.8586011e−10  
                 −2.47199046e−10 
               
               
                 C12  
                 −3.96186575e−11 
                 5.63942817e−10 
                 4.909512e−11 
               
               
                 C14  
                 −1.98735779e−11  
                 2.24402337e−09 
                 −4.82549835e−11 
               
               
                 C16  
                 −1.30420456e−15  
                 7.62990824e−13 
                 8.40182189e−13 
               
               
                 C18  
                 −6.32426869e−15  
                 5.2611787e−12  
                 −1.54721191e−13 
               
               
                 C20  
                 −2.91618922e−14 
                 −8.64296247e−12 
                 −6.95092865e−14 
               
               
                 C21  
                 −1.68020917e−17 
                 1.79337812e−16 
                 4.704138e−16 
               
               
                 C23  
                 −6.25679388e−17 
                 6.25344238e−15 
                 −1.98020462e−15 
               
               
                 C25  
                 −8.80198872e−17 
                 9.42589658e−15 
                 2.8630395e−16 
               
               
                 C27  
                 −2.15377736e−17 
                 3.16333951e−15 
                 −7.77736805e−17 
               
               
                 C29  
                 −4.600369e−20 
                 8.50826753e−19 
                 −8.89962473e−19 
               
               
                 C31  
                 −2.88783883e−20 
                 2.46500403e−18 
                 5.70734704e−18 
               
               
                 C33  
                 −8.24469634e−20 
                 6.11421542e−18 
                 −4.94608169e−19 
               
               
                 C35  
                 2.99965283e−20 
                 2.68054245e−16 
                 −5.37362862e−20 
               
               
                 C36  
                 −9.14144609e−23 
                 −7.61482446e−22 
                 −1.16419356e−20 
               
               
                 C38  
                 4.56746146e−23 
                 −2.10318024e−20 
                 −9.74634025e−21 
               
               
                 C40  
                 −7.5942581e−23 
                 −5.13442867e−20 
                 −1.73898241e−20 
               
               
                 C42  
                 −9.34952004e−23 
                 −3.80153592e−19 
                 1.16341028e−21 
               
               
                 C44  
                 8.70041492e−23 
                 −1.58149457e−18 
                 −5.56161657e−23 
               
               
                 C46  
                 2.46539099e−25 
                 1.26001421e−23 
                 2.22991592e−23 
               
               
                 C48  
                 8.63975279e−26 
                 2.26904047e−22 
                 −1.33814512e−23 
               
               
                 C50  
                 −4.64231072e−26 
                 −6.94971301e−22 
                 2.69140707e−23 
               
               
                 C52  
                 6.06567137e−26 
                 −6.14162469e−21 
                 −5.72930293e−24 
               
               
                 C54  
                 −1.27628469e−25 
                 −1.39892604e−20 
                 −3.17383225e−26 
               
               
                 C55  
                 2.6730632e−28 
                 1.6124594e−26 
                 2.37901686e−25 
               
               
                 C57  
                 −4.04681746e−28 
                 1.79194869e−26 
                 5.74908171e−25 
               
               
                 C59  
                 −6.13934671e−28 
                 −1.07916138e−24 
                 5.16858652e−25 
               
               
                 C61  
                 −6.82989222e−28 
                 −1.84874159e−24 
                 2.29934781e−26 
               
               
                 C63  
                 3.76587364e−29 
                 5.28129065e−24 
                 1.41744145e−26 
               
               
                 C65  
                 −5.97299103e−28 
                 4.17347416e−23 
                 −6.38021913e−28 
               
               
                 C67  
                 −8.00678063e−31 
                 −1.43486698e−28 
                 −1.37565501e−27 
               
               
                 C69  
                 −1.53299808e−30 
                 −1.07367054e−26 
                 −2.50594871e−27 
               
               
                 C71  
                 −2.2827634e−30 
                 −5.11892322e−26 
                 −1.5202136e−27 
               
               
                 C73  
                 −9.22430613e−31 
                 5.3567633e−26 
                 5.54122224e−29 
               
               
                 C75  
                 −2.04873095e−31 
                 5.18408279e−25 
                 −2.72156696e−30 
               
               
                 C77  
                 −6.4177289e−32 
                 5.33075313e−25 
                 −1.86793706e−30 
               
               
                 C78  
                 −7.06113511e−34 
                 −2.43461881e−32 
                 −2.29557514e−30 
               
               
                 C80  
                 1.65419247e−33 
                 −3.36354314e−30 
                 −3.59407598e−30 
               
               
                 C82  
                 2.92887405e−33 
                 −5.11443547e−29 
                 −5.23025061e−30 
               
               
                 C84  
                 2.38944422e−33 
                 −1.21605902e−28 
                 −1.39956581e−30 
               
               
                 C86  
                 1.43540305e−33 
                 3.51950254e−28 
                 −9.71779804e−31 
               
               
                 C88  
                 −8.40166712e−34 
                 1.05641088e−27 
                 −2.99362195e−32 
               
               
                 C90  
                 2.0391317e−33 
                 4.65391348e−28 
                 −5.23904991e−33 
               
               
                 C92  
                 1.00499798e−36 
                 −8.58357662e−34 
                 1.34776694e−32 
               
               
                 C94  
                 4.02569735e−36 
                 4.77402789e−32 
                 4.44047422e−32 
               
               
                 C96  
                 7.01500616e−36 
                 4.67883986e−31 
                 4.16406381e−32 
               
               
                 C98  
                 8.04929982e−36 
                 9.55009976e−31 
                 1.04273961e−32 
               
               
                 C100 
                 4.68663927e−36 
                 −3.2932887e−30 
                 1.93974596e−33 
               
               
                 C102 
                 −1.29112855e−37 
                 −1.71231238e−29 
                 −1.56753621e−34 
               
               
                 C104 
                 9.67137076e−37 
                 −7.97131674e−30 
                 −1.47926534e−37 
               
               
                 C105 
                 1.11271388e−39 
                 −3.44544264e−37 
                 8.43323406e−36 
               
               
                 C107 
                 −4.76286158e−39 
                 4.82999866e−36 
                 −3.41901443e−35 
               
               
                 C109 
                 −1.118952e−38 
                 3.91182791e−34 
                 −8.08948161e−35 
               
               
                 C111 
                 −7.53155915e−39 
                 2.39245204e−33 
                 −5.40349834e−35 
               
               
                 C113 
                 9.30385061e−40 
                 2.7404568e−33 
                 −1.00364838e−35 
               
               
                 C115 
                 1.87013187e−39 
                 −2.89625364e−32 
                 −8.7229565e−37 
               
               
                 C117 
                 6.90121236e−40 
                 −5.01404328e−32 
                 3.65273911e−37 
               
               
                 C119 
                 −3.74212372e−39 
                 −4.09799797e−32 
                 1.12325475e−38 
               
               
                 C121 
                 −9.54707202e−43 
                 0 
                 0 
               
               
                 C123 
                 −2.62679834e−42 
                 0 
                 0 
               
               
                 C125 
                 −8.36961189e−42  
                 0 
                 0 
               
               
                 C127  
                 −1.27197695e−41  
                 0 
                 0 
               
               
                 C129  
                 −1.69138752e−41  
                 0 
                 0 
               
               
                 C131  
                 −1.47039402e−41  
                 0 
                 0 
               
               
                 C133  
                 −6.44328143e−43  
                 0 
                 0 
               
               
                 C135 
                 −1.4137325e−42  
                 0 
                 0 
               
               
                 C136  
                 −6.29707457e−46  
                 0 
                 0 
               
               
                 C138 
                 7.90022937e−45  
                 0 
                 0 
               
               
                 C140 
                 1.78795966e−44 
                 0 
                 0 
               
               
                 C142 
                 9.78046993e−46  
                 0 
                 0 
               
               
                 C144 
                 −2.43869352e−44 
                 0 
                 0 
               
               
                 C146  
                 −3.47062344e−44  
                 0 
                 0 
               
               
                 C148  
                 −1.50798531e−44  
                 0 
                 0 
               
               
                 C150 
                 1.06161581e−45 
                 0 
                 0 
               
               
                 C152 
                 1.98865409e−45  
                 0 
                 0 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
             
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 3B 
               
             
             
               
                   
               
               
                 for Figure 26/27 
               
             
          
           
               
                 Coefficient 
                 M5 
                 M4 
                 M3 
               
               
                   
               
             
          
           
               
                 KY 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 KX 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 RX 
                 29363.70860000 
                 −2837.31613200  
                 14646.09253000 
               
               
                 C7  
                 −4.08679454e−08 
                 −2.2313771e−08 
                 −2.40261236e−08 
               
               
                 C9  
                 −8.36871827e−08 
                 −2.32045837e−07 
                 −2.73422915e−08 
               
               
                 C10  
                 2.09705971e−12 
                 3.04092615e−12 
                 −2.9513388e−11 
               
               
                 C12  
                 2.51272222e−11 
                 3.61049914e−11  
                 −9.15077185e−12 
               
               
                 C14  
                 1.69227063e−10 
                 −2.42492909e−10 
                 2.00210463e−11 
               
               
                 C16  
                 5.53060661e−16 
                 −2.0819334e−15 
                 6.86342081e−15 
               
               
                 C18  
                 −9.23199034e−15 
                 −7.74983288e−14 
                 4.41510207e−16 
               
               
                 C20  
                 −4.027388e−13 
                 −6.80249784e−13  
                 −2.58531088e−14 
               
               
                 C21  
                 −3.47291575e−18 
                 2.26580114e−19 
                 −2.20608669e−18 
               
               
                 C23  
                 −3.45747429e−17 
                 2.377501e−17 
                 −2.05484907e−17 
               
               
                 C25  
                 −7.65596175e−17 
                 5.04278865e−16 
                 −3.59068158e−17 
               
               
                 C27  
                 9.79386352e−16  
                 7.19302412e−15 
                 1.79584203e−16 
               
               
                 C29  
                 2.90897557e−20 
                 −1.01345449e−21 
                 −6.1251551e−21 
               
               
                 C31  
                 1.0408761e−19 
                 −1.71410922e−19 
                 3.62781965e−20 
               
               
                 C33  
                 4.42359728e−19 
                 −2.04391929e−18 
                 1.22971099e−19 
               
               
                 C35  
                 −2.18936205e−18 
                 −1.54712261e−16 
                 1.94648572e−18 
               
               
                 C36  
                 1.30619995e−23  
                 1.43899323e−26 
                 1.07492344e−23 
               
               
                 C38  
                 −3.65876394e−23 
                 −3.4203498e−24 
                 5.58625518e−23 
               
               
                 C40  
                 −1.52815438e−22 
                 −7.30927606e−22 
                 1.48075572e−22 
               
               
                 C42  
                 −2.96583741e−21 
                 −1.1688423e−20 
                 1.16917436e−21 
               
               
                 C44  
                 5.7262241e−21 
                 3.59003428e−18 
                 −5.57317878e−21 
               
               
                 C46  
                 −1.6972836e−25 
                 1.14473368e−27  
                 −6.48101479e−28 
               
               
                 C48  
                 −4.74294826e−25 
                 5.43217288e−26  
                 −4.63479637e−25 
               
               
                 C50  
                 −7.95753522e−25 
                 −1.137132e−23 
                 −2.24743327e−24 
               
               
                 C52  
                 −3.26107419e−24 
                 −4.83879624e−22 
                 −4.28781689e−24 
               
               
                 C54  
                 −2.26528951e−23 
                 4.56671842e−20  
                 −1.67533641e−22 
               
               
                 C55  
                 −4.30900642e−29 
                 5.10227319e−31  
                 −1.05264632e−28 
               
               
                 C57  
                 2.89748678e−28 
                 5.65706438e−29 
                 −1.05218012e−28 
               
               
                 C59  
                 2.11195041e−27 
                 4.28804717e−27  
                 −1.31683082e−27 
               
               
                 C61  
                 5.0160429e−27 
                 1.38412296e−24  
                 −1.05261953e−26 
               
               
                 C63  
                 7.19967176e−26 
                 −9.83289711e−24 
                 −3.85154123e−26 
               
               
                 C65  
                 −4.08256809e−26 
                 −1.6982784e−21  
                 −4.65379054e−25 
               
               
                 C67  
                 5.05025434e−31 
                 −6.95990045e−33 
                 −3.11256872e−32 
               
               
                 C69  
                 1.42714944e−30 
                 −1.33890648e−30  
                 1.65988582e−30 
               
               
                 C71  
                 7.45092588e−30 
                 −5.83117347e−29  
                 1.56036122e−29 
               
               
                 C73  
                 1.99335578e−29 
                 −2.28709957e−26  
                 7.80549941e−29 
               
               
                 C75  
                 6.23811627e−28 
                 2.13086029e−25 
                 6.62602459e−29 
               
               
                 C77  
                 −2.27266233e−28 
                 9.58109313e−24 
                 3.88182163e−27 
               
               
                 C78  
                 5.21616902e−35 
                 −2.18826289e−37  
                 2.25858762e−34 
               
               
                 C80  
                 −3.89851427e−34 
                 2.51802019e−35 
                 1.96804001e−35 
               
               
                 C82  
                 −6.6719409e−33 
                 6.15191756e−34 
                 7.16915829e−33 
               
               
                 C84  
                 2.59908145e−32 
                 −1.57558885e−30  
                 8.22440794e−32 
               
               
                 C86  
                 −2.38366597e−31 
                 1.52473073e−28 
                 3.31913873e−31 
               
               
                 C88  
                 −6.81072162e−31 
                 2.46751442e−27 
                 5.7378916e−31 
               
               
                 C90  
                 2.30360439e−30 
                 7.51106446e−26 
                 2.96813954e−29 
               
               
                 C92  
                 −8.0899315e−37 
                 6.76836149e−39 
                 4.61223413e−38 
               
               
                 C94  
                 −9.2704549e−36 
                 1.45298999e−36 
                 −2.33835226e−36 
               
               
                 C96  
                 −6.4688252e−35 
                 1.62712528e−34  
                 −3.24259664e−35 
               
               
                 C98  
                 −9.76323269e−35 
                 3.29916833e−32 
                 −2.83361995e−34 
               
               
                 C100 
                 −1.72013015e−33 
                 −5.56840797e−31 
                 −9.31180311e−34 
               
               
                 C102 
                 −1.4852411e−32 
                 −5.59819448e−29 
                 −1.23445076e−34 
               
               
                 C104 
                 1.76323714e−32 
                 −9.11469106e−28 
                 7.59914928e−32 
               
               
                 C105 
                 2.70851366e−41 
                 −3.10685744e−43 
                 −1.38859727e−40 
               
               
                 C107 
                 2.70717847e−39 
                 −1.41829562e−40 
                 4.12766595e−40 
               
               
                 C109 
                 4.3484992e−38 
                 −9.43723768e−39 
                 −1.19038711e−38 
               
               
                 C111 
                 7.71332614e−38 
                 −1.1727652e−36 
                 −2.06952102e−37 
               
               
                 C113 
                 3.20979484e−37 
                 −1.56794917e−34 
                 −1.38822649e−36 
               
               
                 C115 
                 −2.94924599e−36 
                 1.70010457e−33 
                 −3.67358357e−36 
               
               
                 C117 
                 −3.38333116e−35 
                 2.40858822e−31 
                 −2.35890929e−36 
               
               
                 C119 
                 5.46219248e−35 
                 2.39253918e−30 
                 7.02180934e−35 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
             
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 3C 
               
             
             
               
                   
               
               
                 for Figure 26/27 
               
             
          
           
               
                   
                 Coefficient 
                 M2 
                 M1 
               
               
                   
                   
               
             
          
           
               
                   
                 KY 
                 0.00000000 
                 0.00000000 
               
               
                   
                 KX 
                 0.00000000 
                 0.00000000 
               
               
                   
                 RX 
                 −8591.25985000 
                 −44223.29270000 
               
               
                   
                 C7  
                 2.99148093e−08 
                 −3.51511776e−08 
               
               
                   
                 C9  
                 −2.75260874e−09 
                 −7.11448809e−08 
               
               
                   
                 C10  
                 5.55081545e−11 
                 −4.10270779e−11 
               
               
                   
                 C12  
                 −5.97183171e−12 
                 −2.8217723e−11 
               
               
                   
                 C14  
                 −4.06031762e−13 
                 2.14989264e−10 
               
               
                   
                 C16  
                 −2.79778356e−14 
                 1.40795276e−13 
               
               
                   
                 C18  
                 1.79288323e−14 
                 8.05770554e−13 
               
               
                   
                 C20  
                 −3.38327995e−15 
                 −2.59389473e−13 
               
               
                   
                 C21  
                 −3.48066202e−17 
                 4.10045555e−17 
               
               
                   
                 C23  
                 1.63939639e−17 
                 −7.17948803e−16 
               
               
                   
                 C25  
                 1.84526437e−18 
                 −1.3131289e−15 
               
               
                   
                 C27  
                 −1.02528315e−18 
                 2.72912338e−16 
               
               
                   
                 C29  
                 −1.3014589e−19 
                 −4.68210382e−20 
               
               
                   
                 C31  
                 −5.87409678e−21 
                 1.02547618e−19 
               
               
                   
                 C33  
                 −1.16533212e−20 
                 −3.15126138e−18 
               
               
                   
                 C35  
                 5.34922803e−21 
                 −3.27597939e−18 
               
               
                   
                 C36  
                 5.03657859e−22 
                 3.82370931e−23 
               
               
                   
                 C38  
                 −1.91027438e−22 
                 1.12562095e−21 
               
               
                   
                 C40  
                 −7.7852516e−23 
                 8.84579475e−21 
               
               
                   
                 C42  
                 −1.1265141e−23 
                 6.72624215e−20 
               
               
                   
                 C44  
                 −6.20839372e−25 
                 −2.03858478e−20 
               
               
                   
                 C46  
                 −2.10802913e−25 
                 3.84408406e−24 
               
               
                   
                 C48  
                 2.31729842e−25 
                 4.44222408e−23 
               
               
                   
                 C50  
                 5.57599755e−26 
                 −2.10654686e−23 
               
               
                   
                 C52  
                 7.03833262e−28 
                 −3.99067489e−22 
               
               
                   
                 C54  
                 −1.44691171e−26 
                 −4.82876579e−22 
               
               
                   
                 C55  
                 −5.4662909e−28 
                 −5.75573129e−29 
               
               
                   
                 C57  
                 7.13770069e−28 
                 1.05708712e−26 
               
               
                   
                 C59  
                 9.05959984e−28 
                 4.45669379e−26 
               
               
                   
                 C61  
                 3.90484003e−28 
                 −3.24661836e−27 
               
               
                   
                 C63  
                 2.9845833e−29  
                 −1.59551772e−24 
               
               
                   
                 C65  
                 −2.62761246e−30 
                 4.84788324e−24 
               
               
                   
                 C67  
                 7.20493267e−31 
                 −2.6429913e−29 
               
               
                   
                 C69  
                 −1.50894693e−30 
                 −9.20367529e−28 
               
               
                   
                 C71  
                 −9.91502164e−31 
                 −4.32416568e−27 
               
               
                   
                 C73  
                 −1.90214439e−31 
                 1.34332393e−27 
               
               
                   
                 C75  
                 2.61487275e−32 
                 2.39717536e−26 
               
               
                   
                 C77  
                 2.34033428e−32 
                 2.51255795e−26 
               
               
                   
                 C78  
                 −2.16847329e−33 
                 −8.54089655e−33 
               
               
                   
                 C80  
                 −3.95387479e−33 
                 −1.24782323e−31 
               
               
                   
                 C82  
                 −5.79159657e−33 
                 1.15198274e−30 
               
               
                   
                 C84  
                 −3.51740059e−33 
                 7.37679351e−30 
               
               
                   
                 C86  
                 −9.22238958e−34 
                 −4.65048215e−30 
               
               
                   
                 C88  
                 −3.05983814e−35 
                 −6.03530894e−30 
               
               
                   
                 C90  
                 9.8645578e−36  
                 −1.90490163e−28 
               
               
                   
                 C92  
                 1.31596904e−36 
                 2.57330157e−35 
               
               
                   
                 C94  
                 7.63172154e−36 
                 2.82127945e−33 
               
               
                   
                 C96  
                 4.69550164e−36 
                 2.41325577e−32 
               
               
                   
                 C98  
                 1.33696127e−36 
                 6.70244162e−32 
               
               
                   
                 C100 
                 1.54304009e−37 
                 −8.05861336e−32 
               
               
                   
                 C102 
                 −3.22616636e−38 
                 −4.38796518e−31 
               
               
                   
                 C104 
                 −1.43000965e−38 
                 −2.82969243e−31 
               
               
                   
                 C105 
                 8.01929474e−40 
                 3.73241981e−38 
               
               
                   
                 C107 
                 3.2676891e−39  
                 1.45855716e−36 
               
               
                   
                 C109 
                 7.46821996e−39 
                 3.02629332e−36 
               
               
                   
                 C111 
                 9.81393372e−39 
                 −3.70759447e−35 
               
               
                   
                 C113 
                 4.50117184e−39 
                 −1.1474833e−34 
               
               
                   
                 C115 
                 7.30739397e−40 
                 5.05238578e−34 
               
               
                   
                 C117 
                 1.09045016e−42 
                 1.19088272e−33 
               
               
                   
                 C119 
                 −8.75346337e−42 
                 3.36419998e−33 
               
               
                   
                   
               
             
          
         
       
     
         [0000]    
       
         
               
             
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 4A 
               
             
             
               
                   
               
               
                 for Figure 26/27 
               
             
          
           
               
                 Surface 
                 DCX 
                 DCY 
                 DCZ 
               
               
                   
               
             
          
           
               
                 Image plane 
                 0.00000000 
                 0.00000000 
                 0.00000000 
               
               
                 M8 
                 0.00000000 
                 0.00000000 
                 859.88832187 
               
               
                 M7 
                 0.00000000 
                 −176.20561941 
                 108.16423659 
               
               
                 M6 
                 0.00000000 
                 −698.54439441 
                 1140.58633390 
               
               
                 M5 
                 −0.00000000 
                 −716.55400301 
                 1977.10005031 
               
               
                 M4 
                 0.00000000 
                 −472.43792140 
                 2531.29159348 
               
               
                 M3 
                 0.00000000 
                 −1379.51266357 
                 1438.63634577 
               
               
                 M2 
                 0.00000000 
                 −2608.29927284 
                 741.99389453 
               
               
                 Stop 
                 0.00000000 
                 −2918.25887054 
                 352.59739373 
               
               
                 M1 
                 0.00000000 
                 −3267.93714103 
                 −86.69693993 
               
               
                 Object plane 
                 0.00000000 
                 −3324.46014880 
                 2242.98343748 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
             
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 4B 
               
             
             
               
                   
               
               
                 for Figure 26/27 
               
             
          
           
               
                 Surface 
                 TLA [deg] 
                 TLB [deg] 
                 TLC [deg] 
               
               
                   
               
             
          
           
               
                 Image plane 
                 −0.00000000 
                 0.00000000 
                 −0.00000000 
               
               
                 M8 
                 −6.59603822 
                 0.00000000 
                 −0.00000000 
               
               
                 M7 
                 186.82219104 
                 0.00000000 
                 −0.00000000 
               
               
                 M6 
                 104.03490485  
                 −0.00000000  
                 0.00000000 
               
               
                 M5 
                 78.73015909 
                 −0.00000000 
                 −0.00000000 
               
               
                 M4 
                 −31.73550573 
                 0.00000000 
                 −0.00000000 
               
               
                 M3 
                 219.92622552 
                 −0.00000000 
                 −0.00000000 
               
               
                 M2 
                 40.51532074 
                 0.00000000 
                 −0.00000000 
               
               
                 Stop 
                 19.04239581 
                 180.00000000 
                 0.00000000 
               
               
                 M1 
                 161.43502849 
                 −0.00000000 
                 −0.00000000 
               
               
                 Object plane 
                 −2.21167135 
                 0.00000000 
                 −0.00000000 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 5 for FIG. 26/27 
               
               
                   
               
               
                   
                 Surface 
                 Angle of incidence [deg] 
                 Reflectivity 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                   
                 M8 
                 6.59603822 
                 0.66110189 
               
               
                   
                 M7 
                 20.01426748 
                 0.61355760 
               
               
                   
                 M6 
                 77.19844633 
                 0.83904083 
               
               
                   
                 M5 
                 77.49680791 
                 0.84348513 
               
               
                   
                 M4 
                 7.96247272 
                 0.65888448 
               
               
                   
                 M3 
                 79.62420397 
                 0.87332138 
               
               
                   
                 M2 
                 79.03510874 
                 0.86535589 
               
               
                   
                 M1 
                 19.95481648 
                 0.61393176 
               
               
                   
                 Overall transmission 
                   
                 0.0878 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
             
               
               
               
             
           
               
                 TABLE 6 for FIG. 26/27 
               
               
                   
               
               
                 X[mm] 
                 Y[mm] 
                 Z[mm] 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 0.00000000 
                 −219.15646259 
                 0.00000000 
               
               
                 46.68638707 
                 −216.35703508 
                 0.00000000 
               
               
                 92.44920291 
                 −208.03952648 
                 0.00000000 
               
               
                 136.36850701 
                 −194.43093148 
                 0.00000000 
               
               
                 177.53246672 
                 −175.88140650 
                 0.00000000 
               
               
                 215.04126471 
                 −152.86453345 
                 0.00000000 
               
               
                 248.01037220 
                 −125.99517818 
                 0.00000000 
               
               
                 275.57900231 
                 −96.03396498 
                 0.00000000 
               
               
                 296.93376542 
                 −63.85746854 
                 0.00000000 
               
               
                 311.35383746 
                 −30.38963121 
                 0.00000000 
               
               
                 318.27003544 
                 3.49290551 
                 0.00000000 
               
               
                 317.31667274 
                 37.05306325 
                 0.00000000 
               
               
                 308.35620881 
                 69.73467689 
                 0.00000000 
               
               
                 291.47003488 
                 101.08900987 
                 0.00000000 
               
               
                 266.93645742 
                 130.63667071 
                 0.00000000 
               
               
                 235.22482493 
                 157.78791628 
                 0.00000000 
               
               
                 197.00574657 
                 181.83055596 
                 0.00000000 
               
               
                 153.16053621 
                 201.92815248 
                 0.00000000 
               
               
                 104.79070426 
                 217.17246634 
                 0.00000000 
               
               
                 53.22556587 
                 226.71903168 
                 0.00000000 
               
               
                 0.00000000 
                 229.97244838 
                 −0.00000000 
               
               
                 −53.22556587 
                 226.71903168 
                 0.00000000 
               
               
                 −104.79070426 
                 217.17246634 
                 0.00000000 
               
               
                 −153.16053621 
                 201.92815248 
                 −0.00000000 
               
               
                 −197.00574657 
                 181.83055596 
                 0.00000000 
               
               
                 −235.22482493 
                 157.78791628 
                 0.00000000 
               
               
                 −266.93645742 
                 130.63667071 
                 0.00000000 
               
               
                 −291.47003488 
                 101.08900987 
                 0.00000000 
               
               
                 −308.35620881 
                 69.73467689 
                 0.00000000 
               
               
                 −317.31667274 
                 37.05306325 
                 0.00000000 
               
               
                 −318.27003544 
                 3.49290551 
                 0.00000000 
               
               
                 −311.35383746 
                 −30.38963121 
                 0.00000000 
               
               
                 −296.93376542 
                 −63.85746854 
                 0.00000000 
               
               
                 −275.57900231 
                 −96.03396498 
                 0.00000000 
               
               
                 −248.01037220 
                 −125.99517818 
                 0.00000000 
               
               
                 −215.04126471 
                 −152.86453345 
                 0.00000000 
               
               
                 −177.53246672 
                 −175.88140650 
                 0.00000000 
               
               
                 −136.36850701 
                 −194.43093148 
                 0.00000000 
               
               
                 −92.44920291 
                 −208.03952648 
                 0.00000000 
               
               
                 −46.68638707 
                 −216.35703508 
                 0.00000000 
               
               
                   
               
             
          
         
       
     
         [0424]    An overall reflectivity of the projection optical unit  37  is 8.78%. 
         [0425]    The projection optical unit  37  has an image-side numerical aperture of 0.45. The image field  8  has an x-extent of two times 13 mm and a y-extent of 1.20 mm. The projection optical unit  37  is optimized for an operating wavelength of the illumination light  3  of 13.5 nm. 
         [0426]    The projection optical unit  37  has exactly eight mirrors M 1  to M 8 . The mirrors M 2  and M 3  on the one hand, and M 5 , M 6  on the other hand are embodied as mirrors for grazing incidence and are arranged in each case as a mirror pair directly behind one another in the imaging beam path. The mirrors M 2  and M 3  deflect the chief rays  16  in opposite directions in the xy-plane. The projection optical unit  37  has exactly four mirrors for grazing incidence, namely the mirrors M 2 , M 3 , M 5  and M 6 . The mirrors M 1 , M 4 , M 7  and M 8  are embodied as mirrors for normal incidence. 
         [0427]    In the projection optical unit  37 , a stop  18  is arranged in the beam path between the mirrors M 1  and M 2 , near the grazing incidence on the mirror M 2 . Alternatively or additionally, a stop can be arranged directly on the surface of the mirror M 2 . 
         [0428]    In the xz-plane (cf.  FIG. 27 ), an entrance pupil of the projection optical unit  37  lies 3000 mm after the object field  4  in the beam path of the illumination light. In the yz-plane, the entrance pupil lies 3100 mm after the object field in the imaging beam path of the projection optical unit  37 . An extent of the chief rays  16  emanating from the object field  4  is therefore convergent both in the meridional section according to  FIG. 26  and in the view according to  FIG. 27 . 
         [0429]    In the xz-section (cf.  FIG. 27 ), the stop  18  can lie at a position displaced in the z-direction compared to its position in the yz-section. 
         [0430]    A z-distance between the object field  4  and the image field  8  is approximately 2100 mm. 
         [0431]    An object/image offset (d OIS ) is approximately 3400 mm. 
         [0432]    A free working distance between the mirror M 7  and the image field  8  is 86 mm. 
         [0433]    In the projection optical unit  37 , a scanned RMS value for the wavefront aberration is at most 18 mλ and, on average, 14 mλ. 
         [0434]    A maximum distortion value is at most 0.15 nm in the x-direction and at most 0.14 nm in the y-direction. A telecentricity value in the x-direction is at most 1.17 mrad on the image field-side and a telecentricity value in the y-direction is at most 2.77 mrad on the image field-side. 
         [0435]    Further mirror data emerge from the following table. 
         [0000]    
       
         
               
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
               
             
           
               
                   
                 TABLE 7 for FIG. 26/27 
               
               
                   
                   
               
               
                   
                 M1 
                 M2 
                 M3 
                 M4 
                 M5 
                 M6 
                 M7 
                 M8 
               
               
                   
                   
               
             
             
               
                   
               
             
          
           
               
                 Maximum angle of incidence [deg] 
                 21.3 
                 81.7 
                 83.1 
                 8.8 
                 78.7 
                 80.3 
                 31.6 
                 8.5 
               
               
                 Mirror extent (x) [mm] 
                 548.7 
                 753.9 
                 1041.9 
                 1335.9 
                 970.3 
                 391.0 
                 475.7 
                 814.4 
               
               
                 Mirror extent (y) [mm] 
                 282.8 
                 1204.8 
                 373.1 
                 115.5 
                 344.4 
                 626.7 
                 219.4 
                 791.0 
               
               
                 Maximum mirror diameter [mm] 
                 548.7 
                 1204.8 
                 1042.0 
                 1336.0 
                 970.3 
                 628.1 
                 475.8 
                 815.2 
               
               
                   
               
             
          
         
       
     
         [0436]    There is an intermediate image  19  in the beam path in the region of a reflection on the mirror M 3  in the yz-plane ( FIG. 26 ) and in the imaging beam path region between the mirrors M 6  and M 7  parallel to the xz-plane ( FIG. 27 ). 
         [0437]    The last mirror M 8  in the beam path is not obscured. The illumination light  3  is guided past the continuously used mirror M 8  in the partial beam path between the mirrors M 6  and M 7 . All mirrors M 1  to M 8  have a continuously used reflection surface. 
         [0438]    The mirrors M 1 , M 2 , M 4 , M 6  and M 8  have negative values for the radius, i.e. are, in principle, concave mirrors. The other mirrors M 3 , M 5  and M 7  have positive values for the radius, i.e. are, in principle, convex mirrors. The mirrors M 2 , M 3 , M 5  and M 6  for grazing incidence have very large radii and only constitute small deviations from plane reflection surfaces. 
         [0439]    Some of the data of the above-described projection optical units are once again summarized in the following Tables I and II. The respective first column serves to assign the data to the respective exemplary embodiment. 
         [0440]    The following Table I summarizes the following optical parameters: numerical aperture (NA), image field extent in the x-direction (Fieldsize X), image field extent in the y-direction (Fieldsize Y), image field curvature (Field Curvature) and overall reflectivity or system transmission (Transmission). 
         [0441]    The following Table II specifies the following parameters: “order of the mirror types” (Mirror Type Order), “order of the mirror deflection effect” (Mirror Rotation Order), “refractive power order in the xz-plane” (x Power Order) and “refractive power order in the yz-plane” (y Power Order). These sequences in each case start with the last mirror in the beam path, i.e. follow the reverse beam direction. By way of example, the sequence “LORRLLLR” relates to the deflection effect in the sequence M 8  to M 1  in the embodiment according to  FIG. 2 . 
         [0000]    
       
         
               
               
               
               
               
               
             
               
               
               
               
               
               
             
           
               
                 TABLE 1 
               
               
                   
               
               
                   
                   
                   
                   
                 FIELD 
                   
               
               
                   
                   
                 FIELDSIZE 
                 FIELDSIZE 
                 CURVA- 
               
               
                   
                   
                 X 
                 Y 
                 TURE 
                 TRANSMIS- 
               
               
                 FIG. 
                 NA 
                 [mm] 
                 [mm] 
                 [1/mm] 
                 SION % 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 2 
                 0.45 
                 13 
                 0.784 
                 0 
                 10.43 
               
               
                 3 
                 0.45 
                 13 
                 0.95 
                 0 
                 13.09 
               
               
                 4 
                 0.45 
                 13 
                 0.72 
                 0 
                 13.32 
               
               
                 5 
                 0.45 
                 13 
                 0.98 
                 0 
                 14.73 
               
               
                 6 
                 0.45 
                 13 
                 0.784 
                 0 
                 8.11 
               
               
                 7 
                 0.45 
                 13 
                 0.784 
                 0 
                 9.88 
               
               
                 8 
                 0.45 
                 13 
                 0.784 
                 0 
                 10.04 
               
               
                 9 
                 0.45 
                 13 
                 0.784 
                 0 
                 8.83 
               
               
                 10  
                 0.45 
                 13 
                 0.784 
                 0 
                 7.89 
               
               
                 14, 15 
                 0.6 
                 13 
                 1.2 
                 0.04931455 
                 8.67 
               
               
                 16, 17 
                 0.63 
                 13 
                 1.2 
                 0 
                 9.95 
               
               
                 18, 19 
                 0.55 
                 13 
                 1.2 
                 0 
                 10.03 
               
               
                 20, 21 
                 0.55 
                 26 
                 1.2 
                 0 
                 10.17 
               
               
                 22, 23 
                 0.49 
                 26 
                 1.6 
                 0 
                 10.15 
               
               
                 24, 25 
                 0.5 
                 26 
                 1.2 
                 0 
                 10.12 
               
               
                 26, 27 
                 0.45 
                 26 
                 1.2 
                 0.0070855 
                 8.78 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
               
             
           
               
                 TABLE 2 
               
               
                   
               
               
                   
                   
                 MIRROR 
                   
                   
               
               
                   
                 MIRROR 
                 ROTATION 
                 x POWER 
                 y POWER 
               
               
                 FIG. 
                 TYPE ORDER 
                 ORDER 
                 ORDER 
                 ORDER 
               
               
                   
               
             
             
               
                 2 
                 NNGGNGGN 
                 L0RRLLLR 
                 +−−++++− 
                 +−−++−++ 
               
               
                 3 
                 NNNNGG 
                 00RLLL 
                 +−−−++ 
                 +−−+−+ 
               
               
                 4 
                 NNNNGG 
                 R0RRRR 
                 +−−+++ 
                 +−−+−+ 
               
               
                 5 
                 NNNNGGG 
                 00RLRLR 
                 +−−+−−+ 
                 +−−+−−+ 
               
               
                 6 
                 NNGGNGGN 
                 RRLRRLRL 
                 +−−+++−+ 
                 +−−++−−+ 
               
               
                 7 
                 NNGGNGGN 
                 R0LRRLRL 
                 +−−+++++ 
                 +−+−++−+ 
               
               
                 8 
                 NNGGNGGN 
                 R0RLRLRL 
                 +−−++−++ 
                 +−−+++−+ 
               
               
                 9 
                 NNGGNGGN 
                 R0LLRRRL 
                 +−+−+−−+ 
                 +−−−+−++ 
               
               
                 10  
                 NNGGNGGNG 
                 R0LLRRRLL 
                 +−+−+−−+− 
                 +−−−+−++− 
               
               
                 14, 15 
                 NNGGNGGN 
                 LRRRLLLR 
                 +−−++++− 
                 +−+−++−+ 
               
               
                 16, 17 
                 NNGGNGGN 
                 LRRRLLLR 
                 +−−−+++− 
                 +−−−++−+ 
               
               
                 18, 19 
                 NNGGNGGN 
                 L0RRLLLR 
                 +−−−+++− 
                 +−−−++−+ 
               
               
                 20, 21 
                 NNGGNGGN 
                 L0RRLLLR 
                 +−−−++++ 
                 +−−−++−+ 
               
               
                 22, 23 
                 NNGGNGGN 
                 L0RRLLLR 
                 +−−−++++ 
                 +−−+++−+ 
               
               
                 24, 25 
                 NNGGNGGN 
                 L0RRLLLR 
                 +−−−++++ 
                 +−−−++−+ 
               
               
                 26, 27 
                 NNGGNGGN 
                 LRRRLRLR 
                 ++−−+−++ 
                 +−+−+−++ 
               
               
                   
               
             
          
         
       
     
         [0442]    In the mirror type, the specification “N” relates to a normal incidence (NI) mirror and the designation “G” relates to a grazing incidence (GI) mirror. In the refractive power orders, “+” denotes a concave mirror surface and “−” denotes a convex mirror surface. When comparing the refractive power orders in x and y, it is possible to see that practically all exemplary embodiments, with the exception of e.g. the embodiment according to  FIG. 5 , have different refractive power orders in x and y. By way of example, the mirror M 1  of the embodiment according to  FIG. 2  is convex (refractive power “−”, negative refractive power) in the x-direction and concave (refractive power “+”, positive refractive power) in the y-direction. These mirrors with different signs of the refractive power in x and y constitute saddle surfaces. 
         [0443]    With the exception of the embodiments according to  FIGS. 5 and 10 , GI mirrors always occur in pairs, as can be gathered from the order of the mirror types in Table II. In the embodiment according to  FIG. 5 , three GI mirrors lie one behind the other, namely the mirrors M 1  to M 3 . In the embodiment according to  FIG. 10 , there is a single GI mirror, namely the mirror M 1 . 
         [0444]    The orders of the mirror types of the embodiments according to  FIGS. 6 to 9 and 14 to 27  are identically NNGGNGGN for mirrors M 8  to M 1 . The embodiments according to  FIGS. 14 to 17 and 27  have an identical deflection effect order, namely LRRRLLLR, for mirrors M 8  to M 1 . The embodiments according to  FIGS. 18 to 25  in turn have an identical deflection effect order, namely LORRLLLR, for mirrors M 8  to M 1 . 
         [0445]    In respect of the refractive power order, the embodiment according to  FIG. 7  has five successive mirrors with positive refractive power in the xz-plane, namely mirrors M 1  to M 5 . Other embodiments have up to four successive mirrors with positive refractive power in the xz-plane. The embodiments according to  FIGS. 8 and 22  have three mirrors arranged behind one another with in each case a positive refractive power in the yz-plane, namely mirrors M 3  to M 5  in each case. The other exemplary embodiments, the design data of which were discussed above, do not have more than two successive mirrors with positive refractive power in the yz-plane. 
         [0446]    A plurality of embodiments of the above-described projection optical units do not have two successive mirrors with positive refractive power in either the xz-plane or in the yz-plane. The embodiment according to  FIG. 5  does not have two successive mirrors with positive refractive power in both planes xz and yz. 
         [0447]    In order to produce a microstructured or nanostructured component, the projection exposure apparatus  1  is used as follows: initially, the reflection mask  10  or the reticle and the substrate or the wafer  11  are provided. Subsequently, a structure on the reticle  10  is projected onto a light-sensitive layer of the wafer  11  with the aid of the projection exposure apparatus  1 . By developing the light-sensitive layer, a microstructure or nanostructure is then generated on the wafer  11 , and hence the microstructured component is generated.