Testing light transmitting articles

Details Testing light transmitting articles Testing light transmitting articles

1985-09-24

1988-10-11

LaRoche, Eugene R.

Optics: measuring and testing

Inspection of flaws or impurities

Transparent or translucent material

G01N 2141, G01N 2188

Patent

active

047766921

ABSTRACT:
A disclosed canopy testing using an area imaging device, e.g. a T.V. camera, to view a scene, a cross-hatch pattern say, through the canopy. The viewed image is digitized and stored and a computer evaluates the target image by comparing the apparent positions of its features with their real positions and/or by sensing deviations from straightness of the pattern lines. In a development, a polarimeter or polarization sensitive camera is used to test for hazing and curvature defects.

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patent: 4398822 (1983-08-01), Task
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patent: 4641570 (1987-02-01), Futamura et al.
patent: 4647197 (1987-03-01), Kitaya et al.

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