Tristimulus colorimeter

Details Tristimulus colorimeter Tristimulus colorimeter

G - Physics

01

J

73/56, 73/57

G01J 3/08 (2006.01) G01J 3/51 (2006.01) H03M 1/00 (2006.01) G01J 3/02 (2006.01)

Patent

CA 1086981

In re application of Park French and William H. Conaway For: "Improved Tristimulus Colorimeter" ABSTRACT OF THE DISCLOSURE A tristimulus colorimeter employs a multiplexed dual slope integrator digital voltmeter wherein unknown and reference light beams are compared by sequentially applying unknown and reference electrical signals representative of the two respect- ive light beams to the non-inverting and inverting inputs, re- spectively, of the integrator amplifier. Moreover, a compensating circuit provides for compensation of the colorimeter output sig- nals with respect to reflectance error encountered in the optics portion of the colorimeter.

286162

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