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. 22, 1987
Filed:
May. 10, 1985
Applicant:
Inventors:
Syuichiro Saito, Kanagawa, JP;
Tadashi Okino, Tokyo, JP;
Assignee:
Canon Kabushiki Kaisha, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ; H04N / ;
U.S. Cl.
CPC ...
358228 ; 354416 ; 354423 ;
Abstract
An exposure control apparatus including a diaphragm for controlling the exposure amount on a focal plane, a light metering element for measuring the light passing through an aperture opening of the diaphragm, a servo control circuit for servo controlling the size of the aperture opening by the output of the light metering element, and a signal forming circuit receptive of the output of the light metering element for producing an output signal for controlling the light amount of a flash device.