Patent ID: 9389187
Filing Date: 2016-07-12
CPC Classification: G01N

Claim Text:
1. A method of inspecting a glass sheet having a body with a thickness and front and back surfaces to find at least one glass defect, comprising: aligning a digital camera with an inspection region of the glass sheet that contains the at least one defect, the camera having an object plane, a depth of field DOF and a ready-to-acquire time T moving the digital camera in a z direction along a z-axis, wherein the z direction is one of toward or away from the front surface of the glass sheet and the z-axis is substantially normal to the front surface of the glass sheet; capturing a plurality of digital inspection images of the inspection region for different exposure positions within the glass sheet body as the digital camera is moved in the z direction along the z-axis by performing a plurality of flash exposures of illumination light from at least one type of illumination source, including performing the moving during the ready-to-acquire time T reviewing the plurality of digital inspection images to characterize the defect.