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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 10627610 B1

PDFFull Text
Date of Patent:
Apr. 21, 2020

Filed:

Jun. 15, 2018

Zoom lens and image pickup apparatus

Applicant:

Canon Kabushiki Kaisha, Tokyo, JP;

Inventor:

Shigenobu Sugita, Shimotsuke, JP;

Assignee:

CANON KABUSHIKI KAISHA, Tokyo, JP;

Attorney:

Carter, DeLuca & Farrell LLP

Primary Examiner:

Evelyn A Lester

Int. Cl.
CPC ...
G02B 15/14 (2006.01); G02B 15/173 (2006.01); G02B 13/02 (2006.01); G02B 15/20 (2006.01); G02B 15/163 (2006.01); G02B 5/00 (2006.01); G02B 9/64 (2006.01); G02B 13/00 (2006.01); G02B 9/62 (2006.01); G02B 27/00 (2006.01); G02B 13/18 (2006.01);
U.S. Cl.
CPC ...
G02B 15/173 (2013.01); G02B 13/02 (2013.01); G02B 15/20 (2013.01); G02B 5/005 (2013.01); G02B 9/62 (2013.01); G02B 9/64 (2013.01); G02B 13/009 (2013.01); G02B 13/0045 (2013.01); G02B 13/18 (2013.01); G02B 15/14 (2013.01); G02B 15/163 (2013.01); G02B 27/0025 (2013.01);
Abstract

The zoom lens of the present invention includes a positive lens unit LP (LULP) disposed closest to an object side, a negative lens unit LNF (LULNF) disposed at an image side of LULP, and an aperture stop disposed at image side of LULNF. The zoom lens further includes at image side of aperture stop, successively in order from object side to image side, a positive lens unit LP, a negative lens unit LN(LULN), a positive lens unit LP(LULP), and a negative lens unit LN(LULN), in which intervals between adjacent lens units are changed during zooming. LULNmoves during focusing. The focal length and the total length of zoom lens at a telephoto end, the changing amount from interval between LULPand LULNat a wide angle end to that at telephoto end, and the total length of zoom lens at wide angle end are appropriately set.

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