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. 13, 1983
Filed:
Mar. 13, 1981
Seiichi Hosoda, Fuchu, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
A light source apparatus which comprises a flash discharge tube for illuminating a foreground subject, a switching element connected in series with the flash discharge tube, a light receiving circuit for photoelectrically converting light reflected by a foreground subject to produce a signal corresponding to the amount of light reflected from the received foreground subject and a decision circuit for producing an interruption signal for rendering the switching element non-conductive with partially as a function of the output signal of the light receiving circuit. A correction circuit for producing a correction signal in accordance with a preset film sensitivity is further provided. The decision circuit produces the interruption signal when the difference between the output signals of the correction circuit and light receiving circuit is reduced to zero.