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:
Mar. 12, 1996
Filed:
Jun. 06, 1995
Applicant:
Inventor:
Keiji Osawa, Tokyo, JP;
Assignee:
Nikon Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01J / ; G03B / ;
U.S. Cl.
CPC ...
2502018 ; 354408 ;
Abstract
A focus detection apparatus that detects focusing conditions among multiple viewing areas within an image plane of a camera in order to guarantee equal focusing precision among the multiple viewing areas. The focus detection apparatus includes an aperture mask, a secondary imaging lens, and a line sensor which are assembled as a sub-unit. Each area of a multitude of viewing areas is provided with such a sub-unit to perform cross-eye adjustments. Finally, each sub-unit is aligned for installation on a main unit that is equipped with a field lens in order to perform pupil exit adjustments independently for each of the aforementioned viewing areas.