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. 31, 2018
Filed:
Aug. 29, 2016
Applicant:
Hoya Corporation, Tokyo, JP;
Inventor:
Hiroaki Fujii, Tokyo, JP;
Assignee:
HOYA CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 23/24 (2006.01); G02B 15/15 (2006.01); A61B 1/00 (2006.01); G02B 15/167 (2006.01); G02B 15/14 (2006.01); G02B 13/02 (2006.01); G02B 13/18 (2006.01);
U.S. Cl.
CPC ...
G02B 23/2438 (2013.01); A61B 1/00188 (2013.01); G02B 15/15 (2013.01); G02B 23/24 (2013.01); G02B 23/2415 (2013.01); A61B 1/00 (2013.01); G02B 13/02 (2013.01); G02B 13/18 (2013.01); G02B 15/14 (2013.01); G02B 15/167 (2013.01); G02B 23/243 (2013.01);
Abstract
An endoscope magnification optical system includes, in order starting from an object side, a first lens group having positive power, a second lens group having positive power, and a third lens group including at least a meniscus lens with a concave surface facing the object side and a positive lens, and the endoscope magnification optical system is configured to magnify an optical image by moving at least the second lens group in an optical axis direction with respect to the first lens group, which is a fixed lens group, while a distance from a lens surface located the closest to the object of the first lens group to an image plane is kept constant.