Method and apparatus for sensing color

Details Method and apparatus for sensing color Method and apparatus for sensing color

1988-08-08

1989-11-07

Scott, Jr., Leon

Optics: measuring and testing

By shade or color

Trichromatic examination

356411, G01N 2125

Patent

active

048787566

ABSTRACT:
A color detecting apparatus and process in which light from a source is directed to a surface whose color is to be measured through an aspheric lens situated so that reflected radiation is returned to the aspheric lens along a reversely directed path. The aspheric lens collimates the reflected light from the surface and directs it to two or more detectors which are tuned to receive energy in two or more preselected band widths along paths which are substantially of equal length with each detector receiving energy in substantially same cross-sectional area of the collimated beam.

REFERENCES:
patent: 4551022 (1985-11-01), Tagaya
patent: 4653014 (1987-03-01), Mikam et al.
patent: 4768873 (1988-09-01), Webb

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