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:
Dec. 31, 2024
Filed:
Sep. 29, 2021
Olympus Corporation, Hachioji, JP;
Hideyasu Takato, Hino, JP;
OLYMPUS CORPORATION, Tokyo, JP;
Abstract
An endoscope objective optical system includes, in order from an object side, a first group having a negative refractive power, a second group having a positive refractive power, and a third group having a positive refractive power. Focusing from an object point at a long distance to an object point at a short distance is carried out by moving the second group from the object side to an image side. The first group includes a lens having a negative refractive power, the second group includes a lens which is a meniscus lens having a positive refractive power of which a convex surface is directed toward the image side, and the third group includes, in order from the object side, a lens having a positive refractive power, and a cemented lens composed of a lens having a positive refractive power and a lens having a negative refractive power.