Patent ID: 9448490
Filing Date: 2016-09-20
CPC Classification: G03F

Claim Text:
1. A system having a first beam path and a second beam path different from the first beam path, the system comprising: imaging optics in the first beam path, the imaging optics configured to image an object plane into an image plane; a first mirror system in the first beam path upstream of the object plane, the first mirror system comprising a base and a plurality of mirror elements supported by the base, each mirror element having a mirror surface with an orientation which is adjustable relative to the base; a second mirror system in the first beam path upstream of the object plane, the second mirror system comprising a base and a plurality of mirror elements supported by the base, a plurality of radiation sources in the second beam path, each radiation source being arranged between adjacent mirror elements of the second mirror system; a detector in the second beam path, wherein: