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:
Sep. 06, 2022
Filed:
Jan. 31, 2020
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventors:
Tomohiko Ishibashi, Utsunomiya, JP;
Kazue Uchida, Utsunomiya, JP;
Assignee:
CANON KABUSHIKI KAISHA, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 5/20 (2006.01); G02B 1/11 (2015.01);
U.S. Cl.
CPC ...
G02B 5/205 (2013.01); G02B 1/11 (2013.01);
Abstract
An optical element having an area in which a transmittance changes in a first direction, the optical element includes a substrate and a first layer in a second direction orthogonal to the first direction. A thickness of the first layer in the second direction changes in the first direction, and the extinction coefficient of the first layer changes in the first direction. A predetermined conditional expression is satisfied.