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. 18, 1997
Filed:
Feb. 03, 1995
Applicant:
Inventor:
Noboru Koizumi, Saitama-ken, JP;
Assignee:
Fuji Photo Optical Co., Ltd., Saitama-ken, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ; G02B / ;
U.S. Cl.
CPC ...
359644 ; 359783 ;
Abstract
A wide field eyepiece with inside focus includes first and second lens groups G.sub.1 and G.sub.2. The first lens group G.sub.1 includes a negative cemented lens component and the second lens group G.sub.2 includes a positive lens component whose face of greater curvature is faced toward the eye point, a positive cemented lens component and a positive lens component whose face of greater curvature is faced toward the object. The first and second lens groups G.sub.1 and G.sub.2 are arranged in this order from the object side. The following formulae (1), (2) and (3) are satisfied,