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. 14, 2020
Filed:
May. 26, 2017
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventors:
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 9/26 (2006.01); G02B 9/12 (2006.01); G02B 13/02 (2006.01); G02B 13/18 (2006.01); G02B 27/00 (2006.01); G02B 15/16 (2006.01);
U.S. Cl.
CPC ...
G02B 9/26 (2013.01); G02B 9/12 (2013.01); G02B 13/02 (2013.01); G02B 13/18 (2013.01); G02B 15/16 (2013.01); G02B 27/0025 (2013.01);
Abstract
An optical system includes a plurality of lenses. The distance from the object side lens surface of a lens arranged an the most object side to the image plane is longer than the focal length of the entire system. The material of a positive lens Garranged on the most object side among positive lenses included in the optical system, and the arrangement and material of a negative lens Gn located on the most object side among negative lenses arranged an the image side of the positive lens Gare appropriately set.