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. 11, 1990
Filed:
Dec. 28, 1989
Yoshiharu Takahashi, Hachioji, JP;
Konica Corporation, Tokyo, JP;
Abstract
A focus detecting apparatus for a camera, includes first and second light-receiving units, and a correlation detecting unit. The first and second light-receiving units receive first and second images formed by light bundle received from an object to be photographed through first and second portions of a photographing lens divided by a face including an optical axis thereof, and output image signals corresponding to light distribution patterns of the images, respectively. The correlation detecting unit detects portions having the highest correlation degree of the two images in accordance with the image signals. The focus detecting apparatus for a camera performs focus detection of the photographing lens on the basis of a detection result of the correlation detecting unit. The correlation detecting unit detects the portions having the highest correlation degree using at least two different methods.