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:
Feb. 25, 2025
Filed:
Jan. 16, 2024
Applicant:
Nikon Corporation, Tokyo, JP;
Inventor:
Kosuke Machida, Tokyo, JP;
Assignee:
Nikon Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 15/14 (2006.01); G02B 15/20 (2006.01); G02B 27/00 (2006.01);
U.S. Cl.
CPC ...
G02B 15/144113 (2019.08); G02B 15/20 (2013.01); G02B 27/0025 (2013.01);
Abstract
A zoom optical system (ZL) comprises, in order from an object, a first lens group (G) having a positive refractive power, a second lens group (G) having a negative refractive power, a third lens group (G) having a positive refractive power, a fourth lens group (G) having a positive refractive power and a succeeding lens group (GR). In the zoom optical system, upon zooming, distances between adjacent lens groups change, and the succeeding lens group (GR) includes a plurality of focusing lens groups that have positive refractive powers and move upon focusing.