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:
Mar. 29, 2016
Filed:
Jan. 03, 2014
Canon Kabushiki Kaisha, Tokyo, JP;
Yutaka Yamaguchi, Utsunomiya, JP;
CANON KABUSHIKI KAISHA, , JP;
Abstract
The absorptive wire-grid polarizer includes a periodic structure formed on a substrate surface of a dielectric substrate and constituted by a metal and one or more dielectric materials. The periodic structure has a one-dimensional grating structure in which, in a sectional plane orthogonal to a normal to the substrate surface, grating portions of a metal grating formed of the metal and grating portions of dielectric gratings formed of the one or more dielectric materials are one-dimensionally arranged with a grating period P. The Conditions of n≧1.0, k≧2.0, 0.01≦FF≦0.25, N≧1.40, and h≧250 [nm] are satisfied where h represents an entire height of the metal and dielectric gratings, nrepresents a refractive index of a real part of a complex refractive index of the metal, krepresents an extinction coefficient of an imaginary part of the complex refractive index, and nrepresents an average refractive index of the dielectric grating.