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:
Jul. 18, 2023
Filed:
Dec. 18, 2020
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventors:
Kenta Sudo, Tochigi, JP;
Kazuki Someya, Tochigi, JP;
Assignee:
CANON KABUSHIKI KAISHA, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 15/14 (2006.01); G02B 15/16 (2006.01);
U.S. Cl.
CPC ...
G02B 15/1441 (2019.08); G02B 15/144113 (2019.08); G02B 15/145121 (2019.08); G02B 15/16 (2013.01);
Abstract
A zoom lens includes, in order from an object side to an image side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a third lens unit having a positive refractive power, and one or more rear lens units. The first lens unit does not move for zooming. An interval between each pair of adjacent lens units changes in zooming. The first lens unit includes a positive lens made of material with an Abbe number less than 30. A predetermined condition is satisfied.