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:
Jan. 20, 1987
Filed:
Feb. 06, 1985
Applicant:
Inventors:
Toshio Sakane, Kanagawa, JP;
Tokuichi Tsunekawa, Kanagawa, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
358228 ; 358174 ;
Abstract
A light metering system for obtaining a light value by scanning the brightness distribution of the object space within a predetermined field of view. Of the thus-produced brightness signals, those which correspond to a particular target area in the view-field are given respective predetermined weights. The light value is derived on the basis of these weighted signals and the remaining signals.