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:
Feb. 27, 2024
Filed:
Apr. 07, 2021
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventors:
Kazuya Shimomura, Saitama, JP;
Akihiko Yuki, Tochigi, JP;
Assignee:
CANON KABUSHIKI KAISHA, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 15/00 (2006.01); G02B 3/04 (2006.01); G02B 15/10 (2006.01); G02B 15/15 (2006.01);
U.S. Cl.
CPC ...
G02B 15/10 (2013.01); G02B 3/04 (2013.01); G02B 15/15 (2013.01);
Abstract
A reduction optical system disposed on an image side of a main optical system, a composite focal length of the main optical system and the reduction optical system being shorter than a focal length of the main optical system, includes a first lens element disposed closest to an object side and having a positive refractive power, a second lens element disposed closest to an image side and having a positive refractive power, and a positive lens and a negative lens disposed between the first lens element and the second lens element.