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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 10641986 B1

PDFFull Text
Date of Patent:
May. 05, 2020

Filed:

Jun. 21, 2018

Zoom lens and imaging apparatus

Applicant:

Fujifilm Corporation, Tokyo, JP;

Inventors:

Masaru Yonezawa, Saitama, JP;

Shinkichi Ikeda, 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 7/10 (2006.01); G02B 15/177 (2006.01); G02B 13/18 (2006.01); G02B 15/167 (2006.01); G02B 15/20 (2006.01); G02B 5/00 (2006.01); G02B 13/00 (2006.01); G02B 3/04 (2006.01); G02B 9/62 (2006.01); G02B 9/64 (2006.01); G02B 9/34 (2006.01); G02B 9/60 (2006.01);
U.S. Cl.
CPC ...
G02B 7/10 (2013.01); G02B 13/18 (2013.01); G02B 15/167 (2013.01); G02B 15/177 (2013.01); G02B 15/20 (2013.01); G02B 3/04 (2013.01); G02B 5/005 (2013.01); G02B 9/34 (2013.01); G02B 9/60 (2013.01); G02B 9/62 (2013.01); G02B 9/64 (2013.01); G02B 13/009 (2013.01); G02B 13/0015 (2013.01); G02B 13/0045 (2013.01); G02B 15/14 (2013.01);
Abstract

The zoom lens includes, in order from the object side: a first lens group Gthat has a positive refractive power and remains stationary during zooming; a plurality of movable lens groups that move by changing distances between groups adjacent to each other in a direction of an optical axis during zooming; and a final lens group Ge that has a positive refractive power and remains stationary during zooming. At least one movable lens group has a negative refractive power. The first lens group Ghas an image side positive lens, which is a positive lens disposed to be closest to the image side, and one or more positive lenses which are disposed to be closer to the object side than the image side positive lens. The zoom lens satisfies predetermined conditional expressions relating to the image side positive lens.

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