Patent Number: 
Section: claims

1. A projection objective for use in short wavelength microlithography to image an object onto a wafer plane, comprising: a first mirror (S 1 ), a second mirror (S 2 ), a third mirror (S 3 ), a fourth mirror (S 4 ), and a fifth mirror (S 5 ) such that the projection objective comprises a first subsystem and a second subsystem and wherein the object is imaged by a first subsystem, formed of the first mirror, the second mirror, and the third mirror (S 1 , S 2 , S 3 ) with an imaging ratio (xcex2) less than 0, into a real intermediate image (Z), and wherein a second subsystem, formed of the fourth mirror and the fifth mirror (S 4 , S 5 ), images the intermediate image as a real system image in the wafer plane. 2. The projection objective of  claim 1 , wherein claim 1 NAxe2x89xa7 0.10,  Wxe2x89xa7 1.0 mm,  Axe2x89xa6 24 xcexcmxe2x88x92129 xcexcm(0.20 xe2x88x92NA )xe2x88x922.1 [xcexcm/mm](2 mmxe2x88x92 W ).  the first mirror (S 1 ), the second mirror (S 2 ), the third mirror (S 3 ), the fourth mirror (S 4 ), and the fifth mirror (S 5 ) are arranged such that the image-side numerical aperture (NA) is  the arc-shaped field width (W) at the wafer plane lies in the range of  and the peak-to-valley deviation (A) of the aspheres in comparison to the best-fitting sphere in the used area is limited on all mirrors by 3. The projection objective of  claim 1 , wherein claim 1 AOI xe2x89xa622xc2x0xe2x88x922xc2x0(0.20 xe2x88x92NA )xe2x88x92[0.3xc2x0/mm](2 mmxe2x88x92 W ),  the first mirror (S 1 ), the second mirror (S 2 ), the third mirror (S 3 ), the fourth mirror (S 4 ), and the fifth mirror (S 5 ) are arranged such that the image-side numerical aperture (NA) is at least 0.10, the image-side width of the arc-shaped field (W) at the wafer plane is at least 1.0 mm, and the angle of incidence (AOI) on all mirrors are in the range:  xe2x80x83where the angle of incidence is measured for any given mirror relative to the surface normal of that mirror. 4. The projection objective of  claim 1 , wherein claim 1 the first mirror (S 1 ), the second mirror (S 2 ), the third mirror (S 3 ), the fourth mirror (S 4 ), and the fifth mirror (S 5 ) are arranged such that the image-side numerical aperture (NA) is at least 0.10, and an object plane, where the object is located, is within the structural space of a mirror system consisting of the first mirror, second mirror, third mirror, fourth mirror and fifth mirror. 5. The projection objective according to  claim 1 , wherein the first subsystem is disposed near the object and that the second subsystem is disposed near the wafer plane. claim 1 6. The projection objective according to  claim 4 , wherein the mirrors are arranged in such a way that there is sufficient lateral structural space provided for a scan of the object plane so that an obscuration-free beam path is achieved. claim 4 7. The projection objective according to  claim 4 , wherein the mirrors are arranged in such a way that there is sufficient axial structural space for a scan of the object plane so that an obscuration-free beam path is achieved. claim 4 8. The projection objective according to  claim 1 , wherein the fourth mirror and the fifth mirror have substantially the same radii (R). claim 1 9. The projection objective according to  claim 8 , wherein the distance between the fourth mirror and the fifth mirror is approximately  claim 8 10. The projection objective according to  claim 1 , wherein the mirror surfaces are arranged on surfaces which exhibit rotational symmetry with respect to a principal axis (PA). claim 1 11. The projection objective according to  claim 1 , further comprising an aperture stop (B) arranged on the body of the first mirror (S 1 ). claim 1 12. The projection objective according to  claim 1 , wherein the aperture stop lies between the first mirror and second mirror so that it is freely accessible. claim 1 13. The projection objective according to  claim 1 , wherein at least four mirrors are aspherical. claim 1 14. The projection objective according to  claim 13 , wherein all mirrors are aspherical. claim 13 15. The projection objective according to  claim 1 , wherein the imaging ratio (xcex2) of the first subsystem is between xe2x88x920.5 and xe2x88x921.0. claim 1 16. The projection objective according to  claim 1 , wherein the rms wavefront error of the objective is at most 0.07 xcex over an entire image field. claim 1 17. The projection exposure apparatus with a microlithography projection objective according to  claim 1 , further comprising an illumination device for illuminating an arc-shaped field. claim 1