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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 10571651 B1

PDFFull Text
Date of Patent:
Feb. 25, 2020

Filed:

Dec. 26, 2017

Image pickup optical system, image pickup apparatus having the image pickup optical system, lens apparatus having the image pickup optical system, and image pickup system having the image pickup optical system

Applicant:

Canon Kabushiki Kaisha, Tokyo, JP;

Inventor:

Hideki Sakai, Sakura, JP;

Assignee:

CANON KABUSHIKI KAISHA, Tokyo, JP;

Attorney:

Carter, DeLuca & Farrell LLP

Primary Examiner:

Alicia M Harrington

Int. Cl.
CPC ...
G02B 9/12 (2006.01); G02B 7/02 (2006.01); G02B 27/00 (2006.01); G02B 13/18 (2006.01); G02B 7/04 (2006.01); G02B 13/16 (2006.01); G02B 13/24 (2006.01); G02B 9/64 (2006.01); G02B 13/04 (2006.01); G02B 7/08 (2006.01);
U.S. Cl.
CPC ...
G02B 9/12 (2013.01); G02B 7/021 (2013.01); G02B 7/04 (2013.01); G02B 9/64 (2013.01); G02B 13/04 (2013.01); G02B 13/16 (2013.01); G02B 13/18 (2013.01); G02B 13/24 (2013.01); G02B 27/0025 (2013.01); G02B 7/08 (2013.01);
Abstract

Provided is the image pickup optical system including a first lens unit, a second lens unit, and a third lens unit disposed in an order from an object side to an image side, in which an interval between adjacent lens units is changed during focusing. The third lens unit includes an aperture stop. A distance on an optical axis from a lens surface closest to object side to aperture stop when focused at infinity Lf, a distance on optical axis from aperture stop to a lens surface closest to image side when focused at infinity Lr, a distance on optical axis from a lens surface closest to object side to an image plane when focused at infinity L, a focal length of the entire system f, and a moving amount of first lens unit during focusing from infinity to a closest distance M are appropriately set.

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