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. 19, 1996
Filed:
Dec. 20, 1994
Applicant:
Inventors:
Naoki Kitaoka, Chiba, JP;
Keiji Ohsawa, Tokyo, JP;
Assignee:
Nikon Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B / ; G02B / ;
U.S. Cl.
CPC ...
2502018 ; 250216 ; 354407 ;
Abstract
In order to obtain a focus detection device that can perform pupil adjustment accurately in all of a plurality of focus detection areas, field lenses corresponding to each focus detection area in a focus detection device having a plurality of focus detection areas are comprised of separate materials for each focus detection area, and independent adjustment of the eccentricity of the field lens corresponding to each focus detection area is made possible in the plane perpendicular to the optical axis of each field lens so that pupil adjustment can be performed independently for each of the plurality of focus detection areas.