Patent Number: 
Section: abstract

The invention is concerned with a microlithography projection objective device for short wavelength microlithography, preferably  less than 100 nm, with a first mirror (S1), a second mirror (S2), a third mirror (S3), a fourth mirror (S4) and a fifth mirror (S5). The invention is characterized by the fact that the image-side numerical aperture (NA) is greater than or equal to 0.10 and that the mirror closest to the object to be illuminated, preferably the wafer, is arranged in such a way that the image-side optical free working distance corresponds at least to the used diameter (D) of the mirror closest to the wafer; the image-side optical free working distance is at least the sum of one-third of the used diameter (D) of the mirror closest to the wafer and a length which lies between 20 mm and 30 mm; and/or the image-side optical free working distance is at least 50 mm, preferably 60 mm.