Optics: measuring and testing – Inspection of flaws or impurities – Transparent or translucent material
Patent
1995-04-03
1996-09-17
Gonzalez, Frank
Optics: measuring and testing
Inspection of flaws or impurities
Transparent or translucent material
356240, 356124, 356146, G01N 2100
Patent
active
055574033
ABSTRACT:
A system for measuring crazing in a transparency is described which comprises one or more light sources disposed near a first surface of the transparency for projecting light rays through the transparency at the portion thereof having a crazed condition, optical detectors corresponding in number to the number of light sources disposed on the opposite side of the transparency, each detector positioned to detect only light from a single corresponding source reflected from the crazed portion of the transparency, and a source of power for the sources and detectors. A sequencing circuit may be included to selectively activate selected light sources and corresponding optical detectors.
REFERENCES:
patent: 3478218 (1969-11-01), Wuellner et al.
patent: 3656854 (1972-04-01), Bricker
Gonzalez Frank
Kundert Thomas L.
Ratliff Reginald A.
Scearce Bobby D.
The United States of America as represented by the Secretary of
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