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:
Feb. 11, 1997
Filed:
Jul. 07, 1995
Applicant:
Inventors:
Masaru Muramatsu, Kawasaki, JP;
Shinichi Tsukada, Toride, JP;
Assignee:
Nikon Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
396228 ; 396234 ;
Abstract
A photometric device, used in an optical apparatus such as a camera, which includes photometric elements to measure photometric values according to plural regions of a subject field, and corrects the photometric values of photometric elements corresponding to specific regions within the plural regions based on the photometric values of regions outside the specific region and on previously set correction coefficients according to each region. The location of the specific regions on the subject field may be adjusted either manually or automatically based upon a focus adjustment state of a focus detection unit.