Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1988-12-09
1990-07-31
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
356446, G01N 2186
Patent
active
049452533
ABSTRACT:
A gloss sensor for optically measuring the gloss or reflectance of a surface. The gloss sensor includes a light source of emitting a light beam toward a surface to be measured. The gloss sensor also includes a light detecting device arranged to preferentially detect the intensity of the diffusely reflected component of the reflected light beam relative to the specularly reflected component.
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"New Gloss Tests of Paper Products", by Richard S. Hunter, TAPPI, Jan. 1955, vol. 38, No. 1, pp. 17-24.
Measurex Corporation
Nelms David C.
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