Patent ID: 6437357
Filing Date: 2002-08-20
Classification: G01N

Abstract:
An inspection system for a sheet of glass, comprising:a) a first laser and a second laser, each of the first laser and second laser providing a sheet of light; b) a cylindrical lens system, said lens system having a focal point on the main optical axis thereof; c) a first light detection system and a second light detection system; the first laser being located at the focal point of the lens system, the second laser being located at a distance from the lens system that is greater than that of the first laser, said second laser being located off of the axis of the lens system and focused at the second detection system, said second detection system having a spatial filter, the first light detection system receiving light from the first laser and the second light detection system receiving light from the second laser; the inspection system being adapted to position a sheet of glass between the lens system and the detection systems.