Patent ID: 9110038
Filing Date: 2015-08-18
Classification: G01B,G01N

Abstract:
1. Apparatus for inspection of a surface of a device, comprising: a projection module operative to project a pattern along a projection axis of the projection module onto the device; an imaging module operative to receive an image of the pattern reflected from the device along an imaging axis of the imaging module onto an image sensor; and a lens comprised in the imaging module having a first magnification in a first direction orthogonal to the imaging axis and a second magnification different from the first magnification in a second direction orthogonal to both the first direction and the imaging axis, wherein the first magnification in the first direction of the lens is larger than the second magnification in the second direction, so as to achieve an asymmetric magnification of the image of the pattern that is reflected from the device, whereby magnification of the image of the pattern is larger in the first direction than in the second direction.