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. 28, 1995
Filed:
Jun. 27, 1994
Applicant:
Inventor:
Keiji Ohsawa, Tokyo, JP;
Assignee:
Nikon Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01J / ;
U.S. Cl.
CPC ...
2502018 ; 354407 ;
Abstract
A focus state detecting device of divided-pupil phase difference system, having plural distance measuring areas, in which photosensors are provided respectively corresponding to the distance measuring areas in the image field in order to effect focus state detection in the plural distance measuring areas, and at least a part of the photosensors are constructed as an independent unit separate from others, whereby optical adjustment is rendered possible independently in each distance measuring area.