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:
Oct. 06, 1992
Filed:
Apr. 08, 1991
Applicant:
Inventors:
Hiroshi Yamazaki, Chiba, JP;
Noriyuki Osato, Chiba, JP;
Assignee:
Seikosha Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
354412 ;
Abstract
A camera photometric device includes a light receiving element operated by incident light for outputting photometric data. A storage arrangement stores a plurality of photometric data correction tables. An A/D converting circuit has a digital output for addressing the data correction tables stored in the storage arrangement. A variable resistor provides a variable analog voltage that is applied to the A/D converting circuit. A correction data indexing arrangement indexes the photometric data correction tables addressed by the voltage output from the variable resistor as a function of the luminance of incident light.