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, 1981
Filed:
Nov. 09, 1979
Shuichi Takayama, Hachioji, JP;
Kosaku Tsuboshima, Hachioji, JP;
Yoshio Nakajima, Hachioji, JP;
Teruo Iwasawa, Mitaka, JP;
Masafumi Yamazaki, Okaya, JP;
Olympus Optical Company Limited, Tokyo, JP;
Abstract
An apparatus for detecting the in-focusing conditions is disclosed. The apparatus comprises a light guide member having light incident end arranged along a plane which is placed at an angle of inclination against a predetermined focal plane of an optical system; a light receiver arranged near a light outlet end of the light guide member and consisting of a plurality of charge transfer elements arranged to receive light from the outlet end as a picture element array; means for deriving illuminance signals from the picture element array of the light receiver; and means for treating the illuminance signals to detect the in-focused position of the optical system.