Automatic computing color meter

Details Automatic computing color meter Automatic computing color meter

1979-06-25

1981-01-27

Evans, F. L.

Optics: measuring and testing

By dispersed light spectroscopy

With aperture mask

250226, 356323, 356405, 364526, G01J 342, G01J 350

Patent

active

042472024

ABSTRACT:
A novel apparatus for the measurement of color of a sample which comprises an illumination means to illuminate the sample, an electro-optical sensing head to receive the light from the illuminated sample and to output electronic signals and an electronic processing unit to process the signals. The light source may in the preferred embodiment be the sun or the sample itself and a reference optical path is used for reference which is the same optical path as the optical path from the light from the sample. The tristimulus values X, Y, Z and the chromaticity coordinates x, y of the sample with respect to the CIE standards for luminance and chromaticity values are produced for accurate color measurement.

REFERENCES:
patent: 2046958 (1936-07-01), Marvin
patent: 3314327 (1967-04-01), Killpatrick et al.
patent: 3874799 (1975-04-01), Isaacs et al.
patent: 4093991 (1978-06-01), Christie, Jr. et al.
patent: 4165180 (1979-08-01), Failes
Kok et al., Applied Optics, vol. 10, No. 12, Dec. 1971, pp. 2617-2620.

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