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.:
Date of Patent:
Dec. 24, 2024
Filed:
Nov. 18, 2020
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventor:
Yuichi Gyoda, Tochigi, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 15/14 (2006.01); G02B 13/18 (2006.01); G02B 15/177 (2006.01);
U.S. Cl.
CPC ...
G02B 15/144511 (2019.08); G02B 13/18 (2013.01); G02B 15/177 (2013.01);
Abstract
A zoom lens Bincludes a first lens unit Bhaving negative refractive, a second lens unit Bhaving positive refractive power, and a third lens unit Bhaving negative refractive power in order from an object side to an image side. The first lens unit Bmoves during zooming. The first lens unit Bincludes a negative lens Gdisposed closest to the object side and at least one positive lens. Lenses included in the second lens unit Ball have positive refractive power. The number of lenses included in the third lens unit Bis two or less. The third lens unit Bmoves toward the image side during focusing from infinity to close range.