Reflectance sensor for integral illuminant-weighted CIE color matching filters
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United States of America Patent
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Jan 6, 2009
Grant Date -
Sep 28, 2006
app pub date -
Mar 23, 2006
filing date -
Mar 23, 2005
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Expired
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Abstract
A tristimulus colorimeter for measuring reflective or transmissive materials is provided. The colorimeter measures a sample under a calibrated light source, receives inputs to detectors, and determines CIE tristimulus values of the same sample as they would occur under a reference light source. The colorimeter includes a calibrated light source and a single silicon chip that includes three or more detectors. Each detector is permanently coated by a different mix of dyes or other colorants that form a wavelength-selective filter. A single silicon chip embodies all the detectors and electronics, with each detector coated over by deposited filter layers.
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