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:
Aug. 27, 1996
Filed:
Nov. 09, 1994
Akihiro Arai, Tokyo, JP;
Asahi Kogaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A camera equipped with a focal point correction apparatus has a camera body including a film loading portion, a position detecting mechanism, an optical system including a picture taking lens, a shutter, a lens driving mechanism, a pressure plate, a light measuring device, a distance measuring device, a memory, a shutter driving mechanism, a release switch, and a control unit. The position detecting mechanism has a light projecting unit and a light receiving unit and is used to measure the position of the light-sensitive surface of the film in the direction of the optical axis. The focal point correction apparatus includes the position detecting mechanism, the optical system, the memory and the control unit. When a photograph is taken, focal point correction is carried out by determining a correction value for correcting the extension setting of the picture taking lens based on measurements of the position of the film carried out by the position detecting mechanism.