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:
Aug. 18, 2015
Filed:
Oct. 03, 2014
Applicant:
Olympus Medical Systems Corp., Tokyo, JP;
Inventor:
Masahiro Katakura, Tokyo, JP;
Assignee:
OLYMPUS MEDICAL SYSTEMS CORP., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 23/24 (2006.01); G02B 9/14 (2006.01); G02B 13/00 (2006.01); A61B 1/00 (2006.01);
U.S. Cl.
CPC ...
G02B 23/2438 (2013.01); A61B 1/00096 (2013.01); A61B 1/00188 (2013.01); G02B 13/0095 (2013.01); G02B 23/243 (2013.01);
Abstract
An endoscope optical system has a first lens group having positive refractive power, an aperture diaphragm, a second lens group having negative refractive power and a third lens group having positive refractive group, the second lens group moving along an optical axis to perform focusing, the first lens group having a first lens having negative refractive power and a second lens having positive refractive power, and the optical system satisfying the following conditional equation:−5.0<(76)*(1−01)/2<−0.2  (1)0.5<(1+2)/(1−2)<1.2  (2)