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:
Feb. 25, 1986
Filed:
Nov. 13, 1984
Yoichi Yoshida, Hachioji, JP;
Akihiko Hashimoto, Hachioji, JP;
Tatsuya Suzuki, Chofu, JP;
Hitoshi Shirai, Sagamihara, JP;
Hiroshi Akitake, Hachioji, JP;
Hirotsugu Nakazawa, Hachioji, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
An exposure control device for camera includes a detector for detecting the opening of a sector shutter. By detecting an actual opening of the sector shutter, an amount of incremental exposure is calculated based on the opening and the corresponding time interval. Such amount is accumulated to provide an accumulated value. An amount of proper exposure is determined on the basis of photographing information including the brightness of an object being photographed and a film speed. The sector shutter is controlled in accordance with the accumulated value and the amount of proper exposure.