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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.:

US 12007623 B1

PDFFull Text
Date of Patent:
Jun. 11, 2024

Filed:

Nov. 17, 2020

Zoom optical system, optical apparatus and method for manufacturing the zoom optical system

Applicant:

Nikon Corporation, Tokyo, JP;

Inventor:

Kosuke Machida, Tokyo, JP;

Assignee:

Nikon Corporation, Tokyo, JP;

Attorney:

Potomac Law Group, PLLC

Primary Examiner:

Thong Q Nguyen

Int. Cl.
CPC ...
G02B 15/14 (2006.01); G02B 9/10 (2006.01); G02B 15/163 (2006.01); G02B 15/20 (2006.01); G02B 15/22 (2006.01); G02B 5/00 (2006.01); G02B 9/12 (2006.01); G02B 9/34 (2006.01); G02B 9/60 (2006.01); G02B 9/62 (2006.01); G02B 9/64 (2006.01); G02B 13/00 (2006.01); G02B 13/18 (2006.01); G02B 15/17 (2006.01);
U.S. Cl.
CPC ...
G02B 9/10 (2013.01); G02B 15/142 (2019.08); G02B 15/143105 (2019.08); G02B 15/1451 (2019.08); G02B 15/145121 (2019.08); G02B 15/163 (2013.01); G02B 15/20 (2013.01); G02B 15/22 (2013.01); G02B 5/005 (2013.01); G02B 9/12 (2013.01); G02B 9/34 (2013.01); G02B 9/60 (2013.01); G02B 9/62 (2013.01); G02B 9/64 (2013.01); G02B 13/0045 (2013.01); G02B 13/009 (2013.01); G02B 13/18 (2013.01); G02B 15/14 (2013.01); G02B 15/17 (2013.01);
Abstract

A zoom optical system comprises, in order from an object: a first lens group (G) having positive refractive power; a second lens group (G) having negative refractive power; and a subsequent group (GR) including at least one lens group. Upon zooming, distances between the first lens group (G) and the second lens group (G) and between the second lens group (G) and the subsequent group (GR) change. The subsequent group (GR) comprises a focusing group (Gfc) having negative refractive power for focusing. The first lens group (G) comprises a 1-1st lens that has positive refractive power and is disposed closest to the object. A following conditional expression is satisfied:0.20<1/<0.85

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