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. 15, 1987
Filed:
Jun. 19, 1986
Tetsuo Miyasaka, Hachioji, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
A diaphragm controller for a camera of the program type which determines a reduced aperture in accordance with the brightness of an object being photographed and effects a diaphragm control based on an exposure period corresponding to the reduced aperture by measuring the amount of object light passing through the reduced aperture, compares a photometric output of light passing through an aperture during the aperture reducing operation and an output which is obtained by calculating an output which varies during the aperture reducing operation so as to satisfy a predetermined program characteristic and controls an aperture value based on the program characteristic when the photometric output and the calculated output coincide.