G - Physics – 01 – J
Patent
G - Physics
01
J
73/55
G01J 3/52 (2006.01)
Patent
CA 1319272
ABSTRACT A densitometer system adapted for measuring color characteristics of a substantially opaque object sample under test, the system comprising: light source means for generating light rays and directing the same onto the object sample; spectral filter means positioned at a predetermined angle relative to the direction of object illumination by the light source, and responsive to light rays reflected from the object sample so as to discriminate a predetermined color shade set of spectral responses of the reelected light rays; detection means responsive to the light rays trans- mitted through the spectral filter means for generating on separate paths signals representative of the intensity of the transmitted light rays; multiplexing means connected to the detection means for time multiplexing the signals on the separate paths; processing means connected to the multiplexing means for processing the multiplexed signals; input means connected to the processing means for providing user input to the densitometer; and the processing means comprises means for generating solutions to correction factor functions relating a desired reflectance measurement to an actual reflectance measurement for each of the spectral filter color shades, wherein the correction factor functions are each a function of at least two of the actual reflectance measurements of the spectral filter color shades.
579400
Berg Bernard J.
Bowden David R.
Cargill Mark A.
Given William R.
Borden Ladner Gervais Llp
X-Rite Incorporated
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