Patent ID: 8107162

Claim:
A catadioptric projection objective for imaging a pattern, which is arranged on an object plane of the projection objective, on an image plane of the projection objective, comprising: a first objective part imaging an object field to form a first real intermediate image, a second objective part forming a second real intermediate image using the radiation coming from the first objective part; and a third objective part imaging the second real intermediate image on the image plane; wherein the second objective part is a catadioptric objective part with a concave mirror; a first folding mirror deflecting the radiation from the object plane in the direction of the concave mirror and a second folding mirror deflecting the radiation from the concave mirror in the direction of the image plane are provided; and a field lens with a positive refractive power is arranged between the first real intermediate image and the concave mirror, in a region close to the field of the first real intermediate image.