SYSTEM FOR DETECTING SELECTIVE REFRACTIVE DEFECTS IN TRANSPARENT ARTICLES

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 il...

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Bibliographic Details
Main Author ROBERT J. BIERINGER
Format Patent
LanguageEnglish
Published 17.01.1987
Edition4
Subjects
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PHYSICS
TESTING
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Summary: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.
Bibliography:Application Number: CN19851001640