Patent ID: 9297943
Filing Date: 2016-03-29
CPC Classification: G02B

Claim Text:
1. An absorptive wire-grid polarizer comprising: a dielectric substrate; and a periodic structure formed on a substrate surface of the dielectric substrate and constituted by a metal and one or more dielectric materials whose number is represented by i, wherein 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 smaller than that of an entering light entering the polarizer, and wherein the following conditions are satisfied: where h represents an entire height of the metal and dielectric gratings, n where W(z) represents a grating width of the grating portion of the metal grating occupying in the grating period p at a grating height z, and n