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:
Jul. 15, 2025
Filed:
Jan. 12, 2021
Nikon Corporation, Tokyo, JP;
Mami Muratani, Tokyo, JP;
Taku Matsuo, Tokyo, JP;
Satoshi Miwa, Tokyo, JP;
Yoko Komatsubara, Tokyo, JP;
Akino Kondo, Tokyo, JP;
Nikon Corporation, Tokyo, JP;
Abstract
An optical system used in an optical apparatus, such as a camera, is configured to include a plurality of lens groups such that at focusing the distances between the lens groups are varied, that a final lens group disposed closest to an image side of the lens groups includes at least one lens surface having a pole, and that all of the following conditional expressions are satisfied:0.020<<0.120 (1)0.010<<0.150 (2)where Y is image height, f is the focal length of the optical system, TL is the total optical length of the optical system, and Bf is the back focus of the optical system.