Spectral sensitivity correcting device in a photoelectric tristi

Details Spectral sensitivity correcting device in a photoelectric tristi Spectral sensitivity correcting device in a photoelectric tristi

1989-08-04

1991-02-05

Evans, F. L.

Optics: measuring and testing

By shade or color

Tristimulus examination

356419, 364526, G01J 351, G01N 2127

Patent

active

049899821

ABSTRACT:
A spectral sensitivity correcting device in a photoelectric tristimulus colorimeter which comprises three light receiving systems for the measurement of tristimulus values. Signals indicative of respective outputs from two of the light receiving systems multiplied by predetermined correction coefficients are added to or subtracted from an output from the remaining light receiving system so that spectral sensitivity characteristics of the remaining light receiving system can approach predetermined spectral sensitivity characteristics.

REFERENCES:
patent: 4773761 (1988-09-01), Sugiyama et al.

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