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:
Mar. 16, 2021
Filed:
Dec. 10, 2018
Applicant:
Fujifilm Corporation, Tokyo, JP;
Inventor:
Tomoyuki Baba, Saitama, JP;
Assignee:
FUJIFILM Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 23/24 (2006.01); G02B 9/62 (2006.01); A61B 1/00 (2006.01); G02B 13/06 (2006.01); G02B 13/00 (2006.01);
U.S. Cl.
CPC ...
G02B 23/243 (2013.01); A61B 1/00096 (2013.01); A61B 1/00174 (2013.01); A61B 1/00188 (2013.01); G02B 9/62 (2013.01); G02B 13/06 (2013.01); G02B 13/002 (2013.01); G02B 13/0045 (2013.01);
Abstract
The objective optical system for an endoscope includes a negative front group, an aperture stop, and a positive rear group that are arranged in this order from an object side. The front group includes only a cemented lens in which a negative first lens, a negative second lens, and a positive third lens are cemented in this order from the object side, as a lens. The rear group includes only a cemented lens in which include a positive fourth lens, a positive fifth lens, and a negative sixth lens are cemented in this order from the object side, as a lens. Conditional expressions are satisfied.