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. 28, 2020
Filed:
Jun. 12, 2018
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventor:
Naoto Doujou, Utsunomiya, JP;
Assignee:
CANON KABUSHIKI KAISHA, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 9/06 (2006.01); G02B 27/00 (2006.01); H04N 5/30 (2006.01); G02B 7/10 (2006.01); G02B 13/16 (2006.01); G02B 13/14 (2006.01); G01J 5/10 (2006.01);
U.S. Cl.
CPC ...
G02B 9/06 (2013.01); G02B 7/10 (2013.01); G02B 13/14 (2013.01); G02B 13/16 (2013.01); G02B 27/0037 (2013.01); H04N 5/30 (2013.01); G01J 5/10 (2013.01);
Abstract
Provided is an optical system including, in order from an object side to an image side: a first lens having a positive refractive power and having a meniscus shape with a convex surface facing the object side; and a second lens having a positive refractive power and having a meniscus shape with a convex surface facing the object side, wherein the first lens is made of a silicon material, wherein the second lens is made of one of a silicon material and a germanium material, and wherein a focal length of the entire optical system and a distance on an optical axis between the first lens and the second lens are each appropriately set.