Optics: measuring and testing – By polarized light examination – With light attenuation
Patent
1988-09-02
1990-11-13
Evans, F. L.
Optics: measuring and testing
By polarized light examination
With light attenuation
356394, 356237, 358106, 209577, 209586, G01B 1124
Patent
active
049697463
ABSTRACT:
The apparatus of the invention comprises a lighting device for illuminating a component to be inspected to form a halo of light around a periphery of the component and a system for comparing the shape of the halo of light to a known acceptable shape. A camera may be used to detect the halo and a programmed computer may be used to perform image analysis of the shape of the halo to determine if it conforms to an acceptable shape.
REFERENCES:
patent: 4496056 (1985-01-01), Schoenig, Jr. et al.
Marritt Clifford R.
McConnell Bain C.
Nelson John L.
White Kenneth W.
Evans F. L.
Myers Grover M.
R. J. Reynolds Tobacco Company
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