Patent ID: 8958063
Filing Date: 2015-02-17
Classification: F21K,F21Y,G01N

Abstract:
1. A detection system for detecting the defect in a transparent substrate at a detection region, comprising: a first illumination system, comprising: a second illumination system, comprising: an imaging unit for receiving the first lights, the second lights, the third lights and the fourth lights converged at the scan line and conducting the imaging based on these lights, wherein each point on the scan line in the range of the detection region is illuminated by all the first through fourth lights, and the projections of the first and the third lights and the second and the fourth lights, which are converged at each point on the scan line, in a plane P passing the scan line and perpendicular to the transparent substrate are located at different sides of a line the first and the second light planes and the third and the fourth light planes are located at different sides of the plane P, the second and the third light planes are in superposition with the first and the fourth light planes respectively or are closer to the plane P than the first and the fourth light planes respectively.