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:
Nov. 29, 2022
Filed:
Nov. 05, 2019
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventor:
Kazue Uchida, Utsunomiya, JP;
Assignee:
CANON KABUSHIKI KAISHA, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03F 7/09 (2006.01); G02B 1/115 (2015.01); G02B 5/20 (2006.01); G02B 7/00 (2021.01);
U.S. Cl.
CPC ...
G03F 7/091 (2013.01); G02B 1/115 (2013.01); G02B 5/205 (2013.01); G02B 7/006 (2013.01);
Abstract
An optical element has an area in which a transmittance varies, includes first and second antireflection layers, and an absorption layer disposed between the first and second antireflection layers, and satisfies certain conditions.