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. 19, 2016
Filed:
May. 17, 2012
Masayuki Uchiyama, Saitama, JP;
Michio Yanagi, Saitama, JP;
Masayuki Uchiyama, Saitama, JP;
Michio Yanagi, Saitama, JP;
Canon Denshi Kabushiki Kaisha, Chichibu-shi, JP;
Abstract
There is provided an optical filter or an anti-reflection structure with lower reflection in comparison with the conventional ones by comprising a gradient refractive index thin filmwith continuous, periodic refractive index change in the film thickness direction and a fine periodic structurelowering reflection, wherein the refractive index of the gradient refractive index thin filmin its thickness direction on the substrate side changes so as to become close to that of the substrate, while on the fine periodic structurechanges so as to become close to that of the fine periodic structure. The optical filter can be used in an optical device or an electronic device display.