logo

For the Inventor, By the Inventor

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 11327282 B1

PDFFull Text
Date of Patent:
May. 10, 2022

Filed:

Sep. 30, 2021

Zoom lens and imaging apparatus

Applicant:

Fujifilm Corporation, Tokyo, JP;

Inventor:

Daiki Kawamura, Saitama, JP;

Assignee:

FUJIFILM Corporation, Tokyo, JP;

Attorney:

Studebaker & Brackett PC

Primary Examiner:

Evelyn A Lester

Int. Cl.
CPC ...
G02B 15/14 (2006.01); G02B 15/163 (2006.01); G02B 15/177 (2006.01); G02B 13/00 (2006.01); G02B 9/62 (2006.01); G02B 27/00 (2006.01); G02B 9/60 (2006.01); G02B 13/18 (2006.01); G02B 9/34 (2006.01); G02B 5/00 (2006.01); G02B 15/20 (2006.01); G02B 13/04 (2006.01);
U.S. Cl.
CPC ...
G02B 15/163 (2013.01); G02B 15/177 (2013.01); G02B 5/005 (2013.01); G02B 9/34 (2013.01); G02B 9/60 (2013.01); G02B 9/62 (2013.01); G02B 13/009 (2013.01); G02B 13/0045 (2013.01); G02B 13/04 (2013.01); G02B 13/18 (2013.01); G02B 15/14 (2013.01); G02B 15/20 (2013.01); G02B 27/0025 (2013.01);
Abstract

A zoom lens includes a negative first lens group, a positive second lens group, and a subsequent lens group in order from an object side. A focusing lens group closer to an image side than the first lens group moves during focusing. The first lens group consists of a first-a lens group and a first-b lens group in order from the object side. Assuming that an average of refractive indices of the negative lenses of the first-a lens group is Nd1ave, a focal length of the focusing lens group is ff, and a focal length of the first lens group is f1, Conditional Expression (1) of 1.73<Nd1ave<1.95 and Conditional Expression (2) of 1<|ff/f1|<3 are satisfied.

Find Patent Forward Citations

Loading…