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. 22, 2025
Filed:
Mar. 18, 2020
Applicant:
Nikon Corporation, Tokyo, JP;
Inventors:
Yoko Komatsubara, Yokohama, JP;
Toshinori Take, Yokohama, JP;
Masashi Yamashita, Tokyo, JP;
Satoshi Miwa, Yokohama, JP;
Assignee:
Nikon Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 15/14 (2006.01); G02B 13/00 (2006.01); G02B 13/02 (2006.01); G02B 15/22 (2006.01);
U.S. Cl.
CPC ...
G02B 13/0045 (2013.01); G02B 13/02 (2013.01); G02B 15/22 (2013.01);
Abstract
An optical system and an optical apparatus that have favorable imaging performance and a method for manufacturing the optical system are provided. An optical system OL includes, sequentially from an object side, a front group Ghaving positive refractive power and a focusing group Gthat performs focusing by moving in an optical axis direction, the front group Gincludes, sequentially from the object side, a first lens L, a second lens L, and a third lens L, and the optical system OL satisfies a condition expressed by an expression below,0.10<23/1<0.75