Patent ID: 7561263

Claim:
An apparatus for inspecting a specular surface, comprising: a light source; a collector optics for collecting the light from the light source; a homogenizing optics for transmitting the light from the collector optics having a first micro-lens array downstream of the collector optics; a second micro-lens array downstream of the first micro-lens array; a Fourier optics for transmitting the light from the homogenizing optics onto the specular surface; an objective optics; a detector for recording an image; and wherein the collector optics and the first micro-lens array project the light source onto the second micro-lens array, and wherein the second micro-lens array and the Fourier optics project the first micro-lens array onto the specular surface, and wherein the objective optics projects the specular surface onto the detector, the Fourier optics is arranged at a distance greater than its focal length downstream of the homogenizing optics and in that the objective optics is not telecentric on the side of an object.