Patent ID: 7586596
Filing Date: 2009-09-08
Classification: G01N

Abstract:
1. Apparatus for inspecting a surface of a sample, comprising: a detector; and folding optics configured to receive radiation arising from a first region of the surface and radiation arising from a second region of the surface, the first and second regions having a first spatial relationship with respect to each other, the folding optics further configured to form from the radiation a first image of the first region and a second image of the second region on the detector, and the folding optics further configured: (i) such that each of the first and second images on the detector is a linear transformation of the corresponding first and second regions of the surface; (ii) so as to arrange the first and second images on the detector according to a second spatial relationship, different from a linear transformation of the first spatial relationship, with respect to each other; and (iii) so as to arrange, according to the second spatial relationship, the first and second images to more completely fill the detector compared to arranging the first and second images according to the linear transformation of the first spatial relationship.