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:
Jun. 20, 2017
Filed:
Apr. 29, 2014
Applicant:
Olympus Corporation, Tokyo, JP;
Inventor:
Masahiro Katakura, Tokyo, JP;
Assignee:
OLYMPUS CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 13/04 (2006.01); A61B 1/00 (2006.01); G02B 23/24 (2006.01); G02B 9/04 (2006.01); G02B 13/00 (2006.01); G02B 9/10 (2006.01);
U.S. Cl.
CPC ...
G02B 13/04 (2013.01); A61B 1/00096 (2013.01); A61B 1/00188 (2013.01); G02B 23/243 (2013.01); G02B 9/04 (2013.01); G02B 9/10 (2013.01); G02B 13/005 (2013.01);
Abstract
To off-axis and on-axis aberrations at low cost while having a wide angle of view, an endoscope objective optical system () has in order: a negative first lens (L); a negative second lens (L) and a third lens (L) joined to each other; a brightness diaphragm (S); and a positive lens group (G) having a cemented lens (CL) including one positive lens and one negative lens joined to each other, and satisfies expressions (1) and (2):1.0<3(96 deg)/_all<10  (1)1.1<(1+2)/(1−2)<5.0  (2)