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:
Jul. 09, 1991
Filed:
Oct. 23, 1990
Applicant:
Inventors:
Ken Utagawa, Yokohama, JP;
Yosuke Kusaka, Yokohama, JP;
Shigeyuki Uchiyama, Tokyo, JP;
Shozo Yamano, Tokyo, JP;
Kenji Ishizuki, Tokyo, JP;
Assignee:
Nikon Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
354402 ; 354408 ;
Abstract
A focus state detecting device for a camera has plural areas for focus state detection for an object, and is capable of securing wide focus state detecting areas. The device has a pair of first photo-detector arrays arranged in a first direction and a pair of second photo-detector arrays arranged in a second direction, wherein the light receiving area of the first arrays is wider than that of the second arrays, and the first direction is the same as the longitudinal direction of the photographing field.