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:
Aug. 26, 2025
Filed:
Jul. 18, 2022
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventor:
Masato Katayose, Tochigi, JP;
Assignee:
CANON KABUSHIKI KAISHA, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 7/10 (2021.01); G03B 3/10 (2021.01);
U.S. Cl.
CPC ...
G02B 7/102 (2013.01); G03B 3/10 (2013.01);
Abstract
A zoom lens consists of, 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, and a rear group including a plurality of lens units. A distance between adjacent lens units is changed during zooming. The rear group includes a diaphragm, an n-th lens unit disposed closest to an image plane and having a positive refractive power, and an (n−1)-th lens disposed on the object side of the n-th lens unit and having a negative refractive power. A predetermined condition is satisfied.