Patent ID: 8208127

Claim:
A projection arrangement configured to image an object field in an object plane onto an image field in an image plane along a ray path, the projection arrangement comprising: first, second, and third reflective elements; a combination stop positioned at a pupil plane of the ray path, the combination stop having first, second, and third openings, the first opening in the combination stop being configured as an aperture stop, the second opening in the combination stop being configured to allow passage of a ray bundle of the ray path so that the combination stop is an aperture stop and a stray light stop; a reticle; and a device configured to move the combination stop transversely to a meridional plane defined by the projection arrangement and the object field, wherein: the combination stop is between the reticle and the first reflective element; the combination stop is between the first reflective element and the second reflective element; the first opening in the combination stop is configured to allow passage of the ray bundle from the first reflective element to the second reflective element; the second opening in the combination stop is configured to allow passage of the ray bundle between the reticle and first reflective element; the third opening in the combination stop is configured to allow passage of the ray bundle from the second reflective element to the third reflective element; and the projection arrangement is a microlithography projection arrangement.