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:
Nov. 26, 1996
Filed:
Aug. 04, 1994
Applicant:
Inventors:
Yasuhiro Oomura, Tokyo, JP;
Yoshiyuki Shimizu, Miura, JP;
Assignee:
Nikon Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
359643 ; 359645 ;
Abstract
A super-wide field eyepiece comprises, in succession from the incidence side of light, a first lens unit including a meniscus lens having its convex surface facing the incidence side and having positive or negative weak refractive power as a whole, a second lens unit including at least one lens surface having negative refractive power and having positive refractive power as a whole, and a third lens unit including at least two positive lenses and having positive refractive power as a whole, and an intermediate image is formed between the first lens unit and the second lens unit.