Title:
METHOD FOR SELECTIVELY INSPECTING REFRACTIVE DEFECT IN TRANSPARENT PRODUCT
Document Type and Number:
Japanese Patent JPS6145956
Kind Code:
A
Abstract:
A system of illuminating a transparent glass article, such as a TV faceplate, for detecting optical defects. The source of illumination is tailored so as to be space invariant and results in producing a plurality of collimated beams which travel in a continuum of different directions. A uniformly illuminated diffuser plate with a mask has the attribute of enhancing refractive defects of a given magnitude while not detecting those of a more gradual refractive nature. The object is viewed with a linear diode array camera of a given acceptance angle.
Inventors:
ROBAATO JIYON BAIRINGAA
Application Number:
JP16500085A
Publication Date:
March 06, 1986
Filing Date:
July 25, 1985
Export Citation:
Assignee:
OWENS ILLINOIS INC
International Classes:
C03B35/00; G01B11/30; G01N21/89; G01N21/90; G01N21/958; (IPC1-7): C03B35/00; G01B11/30; G01N21/88
Attorney, Agent or Firm:
Kazuo Sato
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