Real-time color comparator

Details Real-time color comparator Real-time color comparator

1987-11-09

1989-06-20

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250227, 356328, G01J 350

Patent

active

048411400

ABSTRACT:
A real-time color comparator which performs color comparisons of sample objects to a reference color for the purpose of identification, sorting or matching. Two optical paths are positioned to collect the light from a reference object and a sample object and the light outputs from the two paths are directed onto a spherical dispersive element shown in the form of a concave diffraction grating that decomposes each light signal into its spectral constituents which are imaged on a dual photodetector array. The color signature from the reference and the color signature from the sample are compared.

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Norman Stauffer & Denny Wilwerding, "Electronic Focus for Cameras", Scientific Honeyweller, vol. 3, No. 1, Mar. 1982, pp. 1-13.

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