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:
Feb. 14, 2017
Filed:
Jul. 21, 2016
Applicant:
Olympus Corporation, Hachioji-shi, Tokyo, JP;
Inventors:
Yuji Kamo, Hino, JP;
Shinya Sato, Hachioji, JP;
Assignee:
OLYMPUS CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 23/24 (2006.01); G02B 13/04 (2006.01); G02B 9/60 (2006.01); A61B 1/00 (2006.01);
U.S. Cl.
CPC ...
G02B 23/243 (2013.01); A61B 1/00188 (2013.01); G02B 9/60 (2013.01); G02B 13/04 (2013.01);
Abstract
A small-sized objective optical system for an endoscope having in order from an object side, a first negative lens which is planoconcave, a second meniscus lens having a convex surface directed toward an image side, a third positive meniscus lens having a convex surface directed toward the object side, a positive lens unit, and a cemented lens in which, a positive lens and a negative lens are cemented. Focusing is carried out by moving the third positive meniscus lens along an optical axis, and the second meniscus lens is a negative lens.