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:
Jul. 22, 2014
Filed:
Oct. 10, 2013
Applicant:
Olympus Medical Systems Corp., Tokyo, JP;
Inventor:
Kazuo Morita, Tokyo, JP;
Assignee:
Olympus Medical Systems Corp., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 13/04 (2006.01); A61B 1/00 (2006.01); G02B 23/26 (2006.01); G02B 23/24 (2006.01); A61B 1/05 (2006.01);
U.S. Cl.
CPC ...
G02B 23/243 (2013.01); A61B 1/00 (2013.01); A61B 1/00163 (2013.01); A61B 1/051 (2013.01);
Abstract
The diameter of an endoscope insertion portion is reduced, and a wide field angle of an endoscope insertion portion is obtained. An endoscope objective optical system includes, from an object side, a first lens formed of a plano-concave lens having a concave surface facing an image side, a second lens formed of a plano-concave lens having a concave surface facing the object side, an aperture stop, and a third lens formed of a plano-convex lens having a plane surface facing the object side, and satisfies0.7≦||0.91.7≦||≦22≦≦4