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:
Sep. 06, 1988
Filed:
Dec. 31, 1986
Applicant:
Inventor:
Toshiyuki Kumakura, Kanagawa, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
354413 ; 354414 ; 354416 ; 354431 ;
Abstract
An apparatus for determining the amount of flash having a first light receiving element for measuring light with respect to a first region (central region) of the frame, a second light receiving element for measuring light with respect to a second region (marginal region). The apparatus determines the amount of flash in accordance with the ratio of the outputs per unit area of the first and second light receiving elements.