Optics: measuring and testing – By shade or color – With color determination by light intensity comparison
Patent
1997-08-20
1999-10-05
Font, Frank G.
Optics: measuring and testing
By shade or color
With color determination by light intensity comparison
356407, G01J 350
Patent
active
059633328
ABSTRACT:
A probe is configured for measuring color in a sample of material having a refractive index. The probe includes a light source that emits a light beam toward the sample. A color sensor is disposed at an oblique angle with the light source and directed toward a common probe zone for containing the sample. The light source and sensor are optically aligned with a reference plane in the probe zone to effect angles of incidence and reflection relative to the zone having a magnitude substantially equal to Brewster's maximum polarization angle for the refractive index of the sample, for measuring interior color of the sample.
REFERENCES:
patent: 4575249 (1986-03-01), Grieger
patent: 4878756 (1989-11-01), Stauffer
patent: 5559173 (1996-09-01), Campo et al.
Fundamentals of Optics, 1976, pp. 500-502.
Feldman Sandra Freedman
Penney Carl Murray
Font Frank G.
General Electric Company
Smith Zandra V.
Snyder Marvin
Stoner Douglas E.
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