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:
Dec. 20, 2022
Filed:
May. 27, 2020
Canon Kabushiki Kaisha, Tokyo, JP;
Kenji Makino, Kawasaki, JP;
Toshinao Tatsuno, Utsunomiya, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An optical member that has excellent antireflection properties and that can maintain antifogging properties over a long term, and a method for manufacturing an optical member are provided. The optical member includes, in sequence, a substrate, a porous layer, and a multilayered antireflection layer. The ratio n/nis 0.85 or more and 0.95 or less, where n represents a refractive index of a layer having the highest refractive index among layers included in the antireflection layer and nrepresents a refractive index of a compound constituting the layer having the highest refractive index at a theoretical density.