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. 24, 2023
Filed:
Apr. 19, 2022
Applicant:
Fujifilm Corporation, Tokyo, JP;
Inventor:
Tomoyuki Baba, Saitama, JP;
Assignee:
FUJIFILM Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 13/04 (2006.01); A61B 1/00 (2006.01); G02B 9/62 (2006.01); G02B 23/24 (2006.01); G02B 9/10 (2006.01);
U.S. Cl.
CPC ...
G02B 13/04 (2013.01); A61B 1/00163 (2013.01); G02B 9/10 (2013.01); G02B 9/62 (2013.01); G02B 23/243 (2013.01);
Abstract
An objective optical system for an endoscope consists of, in order from an object side, a negative front group, an aperture stop, and a positive rear group. The front group includes, in order from the object side, only a negative first lens and a cemented lens formed of a negative second lens and a positive third lens cemented to each other, as lenses. The rear group includes, in order from the object side, only a positive fourth lens and a cemented lens formed of a positive fifth lens and a negative sixth lens cemented to each other, as lenses. The objective optical system for an endoscope satisfies predetermined conditional expressions.