Patent ID: 8803968
Filing Date: 2014-08-12
Classification: G01N

Abstract:
1. An apparatus for detecting particles in a flat glass in the state of transferring to decide whether the particles contained in the flat glass are benign defects including bubbles or malignant defects including metals, comprising: a first photographing device, comprising: a second photographing device, comprising: wherein the first polarizer and the second polarizer have different polarization directions in the range of 0° to 20°, and the third polarizer and the fourth polarizer have different polarization directions in the range of 70° to 90°, wherein the light illuminated from the first illumination unit and the second illumination unit does not enter directly to the first camera and the second camera respectively, and the light being obliquely illuminated from the first illumination unit and the second illumination unit directly to the first polarizer and the third polarizer, respectively, and directly from the first polarizer and the third polarizer to the flat glass.