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:
May. 12, 2026
Filed:
Dec. 03, 2021
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventor:
Kazue Uchida, Tochigi, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 1/11 (2015.01);
U.S. Cl.
CPC ...
G02B 1/11 (2013.01);
Abstract
An optical element includes a substrate made of a resin material and an antireflection film. The antireflection film consists of a dielectric layer formed on the substrate and a porous layer formed on the dielectric layer. The dielectric layer includes a first layer including silicon oxide and a second layer including tantalum oxide. The porous layer includes silicon oxide or magnesium fluoride.