The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 05, 1991
Filed:
Aug. 04, 1989
Applicant:
Inventors:
Shigeru Osaki, Osaka, JP;
Masami Sugiyama, Osaka, JP;
Assignee:
Minolta Camera Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01J / ; G01N / ;
U.S. Cl.
CPC ...
356405 ; 356419 ; 364526 ;
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.