Optics: measuring and testing – Inspection of flaws or impurities – Having predetermined light transmission regions
Patent
1985-09-18
1987-03-31
LaRoche, Eugene R.
Optics: measuring and testing
Inspection of flaws or impurities
Having predetermined light transmission regions
G01N 2101, G01N 2129, G01N 2189
Patent
active
046539123
ABSTRACT:
Apparatus is disclosed for examining thin layers deposited on a glass substrate of the plate or strip type under a lighting environment similar to that of outside daylight. The apparatus comprises an inspection booth having a station for observing the surface to be checked and a curved arch above the station to reflect light onto the surface to be observed. The curved arch is uniformly illuminated, has a neutral color, and is curved in an approximately concave manner to direct the light uniformly onto the surface to be examined. This booth permits quality control of layers such as metallic oxides deposited on glass substrates.
REFERENCES:
patent: 1956165 (1934-04-01), Boggs et al.
patent: 2015730 (1935-10-01), Rosin et al.
de Toytot Francois
Neuzillet Desire
LaRoche Eugene R.
Mis David
Saint-Gobain Vitrage
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