Patent ID: 11867630
Assignee: GLASSTECH, INC.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An optical inspection system comprising:
a fixture to support a glass sheet, the fixture having an optical fiducial provided thereon;
an ultraviolet laser and associated optics forming a planar laser sheet directed to the glass sheet, wherein the planar laser sheet intersects a surface of the glass sheet thereby causing the surface of the glass sheet to fluoresce and form a visible wavelength line on the surface;
a camera having an image sensor for detecting the optical fiducial and for detecting the visible wavelength line across at least a portion of a width of the sheet; and
a control system configured to (i) image the optical fiducial on the fixture, (ii) define an optical fiducial coordinate system from the imaged optical fiducial, (ii) receive a mathematical model of the glass sheet in a model coordinate system, and (iii) relate the optical fiducial coordinate system to the model coordinate system via at least one transformation.