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:
Jan. 26, 2021
Filed:
Feb. 21, 2017
Applicant:
Hoya Corporation, Tokyo, JP;
Inventors:
Hiroaki Fujii, Tokyo, JP;
Sachiko Nasu, Tokyo, JP;
Assignee:
HOYA CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61B 1/00 (2006.01); G02B 23/26 (2006.01); G02B 15/16 (2006.01); A61B 1/04 (2006.01); G02B 7/08 (2006.01); G02B 13/18 (2006.01); G02B 15/24 (2006.01); A61B 1/06 (2006.01);
U.S. Cl.
CPC ...
A61B 1/00188 (2013.01); A61B 1/00 (2013.01); A61B 1/00009 (2013.01); A61B 1/00096 (2013.01); A61B 1/04 (2013.01); G02B 7/08 (2013.01); G02B 13/18 (2013.01); G02B 15/16 (2013.01); G02B 15/24 (2013.01); G02B 23/26 (2013.01); A61B 1/06 (2013.01);
Abstract
An endoscope magnification optical system includes, in order from an object side, a first lens group having a negative power, a second lens group having a positive power, and a third lens group having a meniscus lens with a convex surface facing the object side. A distance from a lens surface of the first lens group that is nearest to the object side to an image surface is kept constant while the second lens group is moved in an optical axis direction with respect to the first lens group and the third lens group, which are fixed lens groups, and thereby an optical image is magnified.