Optics: measuring and testing – By polarized light examination
Patent
1994-07-11
1997-09-09
Rosenberger, Richard A.
Optics: measuring and testing
By polarized light examination
356370, 356430, 356259, 25055909, 25055942, 25055945, 25055946, G01J 400, G01N 2100
Patent
active
056661991
ABSTRACT:
A gel defect detection system for the optical inspection of defects in oriented transparent and translucent sheet. The system utilizes two polarizing filters with adjustable orientations so that the transmission axis is from about 70 degrees to about 110 degrees or from about 80 degrees to about 100 degrees. The system uses these polarization filters to help distinguish gel defects from the surrounding oriented sheet.
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Boudreaux, Jr. Edwin
Dreiling Mark J.
Hess Kevin J.
Sukhadia Ashish M.
Cross Ryan N.
Eisenberg Jason D.
Phillips Petroleum Company
Rosenberger Richard A.
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