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:
Sep. 13, 1983
Filed:
Oct. 07, 1981
Applicant:
Inventor:
Ken-ichi Nakahashi, Hachiouji, JP;
Assignee:
Olympus Optical Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ; G02B / ;
U.S. Cl.
CPC ...
350465 ; 350450 ; 350 9626 ;
Abstract
An objective for endoscopes comprising a first, second, third, fourth and fifth lens components in which the first lens component is a negative meniscus lens having a convex surface on the object side, the second lens component is a positive meniscus lens having a concave surface on the object side, the third lens component is a positive lens, the fourth lens component is a cemented lens consisting of a positive lens element and a negative lens element cemented to said positive lens element, and the fifth lens component is a positive lens, the objective for endoscopes having a very wide angle of view and well corrected aberrations.