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:
Dec. 13, 1983
Filed:
Dec. 22, 1980
Applicant:
Inventor:
Kenji Nakauchi, Minami-ashigara, JP;
Assignee:
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01J / ;
U.S. Cl.
CPC ...
356225 ; 354430 ; 354432 ;
Abstract
A plurality of photodetectors are arranged to receive light from different parts of a photographic subject matter. The outputs of the photodetectors are weighted according to the position of the photodetectors. The weighted outputs are summed up and used as image brightness information. The weighting can be made by varying the size of the photodetectors or changing a covering area of a mask provided to cover the photodetectors.
Quick Actions:
Nakauchi, Kenji. (1983). Light measuring device for controlling exposure (U.S. Patent No. 4420252). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4420252
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile