Optics: measuring and testing – By shade or color – With sequential comparison of sample and standard
356419, 364526, G01N 2127
Apparatus for measuring and controlling the color of a moving web in which a circular variable bandpass filter having a passband varying substantially continuously with angular displacement through the optical spectrum is interposed in the optical path between the web and a detector and is rotated to produce a detector output which periodically scans the optical spectrum. In one disclosed embodiment, the detector outputs at the various wavelengths are weighted to produce X, Y and Z tristimulus values while, in another disclosed embodiment, dye flows are so controlled as to minimize the total square error between the measured reflectance spectrum and the desired reflectance spectrum.
patent: 3936189 (1976-02-01), De Remigis
patent: 4019819 (1977-04-01), Lodzinski
patent: 4029419 (1977-06-01), Schumann, Jr. et al.
James et al., Mathematics Dictionary, p. 253, Feb. 1966.
Cutler, "A New Colour-Matching Computer", JSDC, Dec. 1965, pp. 601-608.
Judd et al., "Color in Business, Science and Industry", Wiley, 1975.
Dietert L. A.
McGraw Vincent P.
Sentrol Systems Ltd.
Method and apparatus for measuring and controlling the color of does not yet have a rating. At this time, there are no reviews or comments for this patent.If you have personal experience with Method and apparatus for measuring and controlling the color of , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for measuring and controlling the color of will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1752373