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:
Apr. 01, 2025
Filed:
Oct. 01, 2021
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventors:
Kenta Sudo, Tochigi, JP;
Masakazu Kodaira, Saitama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 15/14 (2006.01); G02B 13/02 (2006.01); G02B 13/06 (2006.01); G02B 27/00 (2006.01);
U.S. Cl.
CPC ...
G02B 15/143507 (2019.08); G02B 13/02 (2013.01); G02B 13/06 (2013.01); G02B 15/1425 (2019.08); G02B 27/0025 (2013.01);
Abstract
A zoom lens includes, in order from an object side to an image side, a first lens unit having a negative refractive power and a second lens unit having a positive refractive power. A distance between adjacent lens units changes during zooming. The first lens unit includes two cemented lenses and each of the two cemented lenses includes a positive lens. Predetermined conditions are satisfied by the zoom lens.