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:
Mar. 12, 2024
Filed:
Mar. 17, 2021
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventor:
Takashi Okada, Saitama, JP;
Assignee:
CANON KABUSHIKI KAISHA, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 13/18 (2006.01); B60R 11/04 (2006.01); G02B 13/00 (2006.01); G02B 15/15 (2006.01);
U.S. Cl.
CPC ...
G02B 13/002 (2013.01); B60R 11/04 (2013.01); G02B 15/15 (2013.01);
Abstract
An optical system consists of a front lens unit having a positive or negative refractive power, a diaphragm, and a rear lens unit having a positive refractive power, which are arranged in this order from an object side to an image side. The front lens unit includes an aspherical lens that has a positive refractive power on an optical axis, and is disposed closest to an object. The aspherical lens has an aspherical surface on the object side in which an off-axis radius of curvature is larger than an on-axis radius of curvature. A predetermined condition is satisfied.