Dexerials Corporation

Tomu Takeda

Hideto Sagawa

Hiroyuki Takahashi

An optical device capable of achieving desired polarization properties including a light source, incident-side polarizing element, optical modulating element, emission-side first polarizing element, and emission-side second polarizing element, the first and second polarizing elements each have a wire-grid structure and include a plurality of convex portions arranged on a transparent substrate and spaced apart from each other at a pitch shorter than the wavelength of light in the light source, the transmission axis of the first polarizing element relative to the transmission axis of the incident-side polarizing element is within ±8.5°, and the convex portions of the second polarizing element are lattice-shaped extending in a predetermined direction and include, in order from the transparent substrate side, a reflection layer, dielectric layer, and absorption layer, the rotation angle of the absorption axis of the second polarizing element relative to the absorption axis of the incident-side polarizing element is within ±0.7°.

Optical device

A polarizing plate has a wire grid structure including a transparent substrate and a plurality of protrusions formed on a first surface of the transparent substrate, extending in a first direction, and periodically arranged apart from each other at a pitch shorter than a wavelength of light in a use band, each of the plurality of protrusions includes a reflective layer, a dielectric laver, and an absorption layer in order from the transparent substrate, and a top surface and a side surface of each of the plurality of protrusions are coated with a protective film made of a dielectric material, the protective film has a cross-sectional area that gradually increases from the top surface side to the transparent substrate side when viewed from a cross section obtained by cutting a protrusion along a plane perpendicular to a surface of the transparent substrate and perpendicular to the first direction.

Polarizing plate, method of manufacturing the same and optical apparatus

Provided is a polarizing plate having a wire grid structure, comprising a transparent substrate, a first antireflection film laminated on the first surface of the transparent substrate, a plurality of protrusions protruding from the first antireflection film, a second antireflection layer laminated on a second surface opposite to the first surface, wherein the plurality of protrusions are periodically arranged at a pitch shorter than a wavelength of light in a use band, each of the protrusions extends in in a first direction and includes a reflective layer, a dielectric layer, and an absorption layer in order from the first direction, and both the first antireflection layer and the second antireflection layer have high refractive index layers and low refractive index layers that are alternately laminated.

Polarizing plate having outermost layer of anti-reflection layer recessed towards substrate

Provided is a transparent substrate, a plurality of protrusions protruding from the first surface of the transparent substrate; and an antireflection film laminated on the second surface opposite to the first surface of the transparent substrate, wherein the plurality of protrusions are periodically arranged at a pitch shorter than a wavelength of light in a use band, each of the protrusions extends in in a first direction and includes a reflective layer, a dielectric layer, and an absorption layer in order from the first direction, the antireflection film has high refractive index layers and low refractive index layers that are alternately laminated, and the antireflection film is an ion beam assisted vapor deposition film or an ion beam sputtering film.

Polarizing plate having specified water contact angle of antireflection layer surface

Provided is a polarizing element having a wire grid structure, including: a transparent substrate; and grid-shaped convex portions arranged on the transparent substrate at a pitch shorter than a wavelength of light in a use band and extending in a predetermined direction, wherein the grid-shaped convex portion includes a first absorption layer, a first dielectric layer, a reflection layer, a second dielectric layer, and a second absorption layer in order from the transparent substrate side. Further, an optical device including the polarizing plate is provided.

Polarizing element, polarizing element manufacturing method, and optical device

A polarizing element has a wire grid structure, and includes a transparent substrate, and projections, which are arrayed on the main surface of the substrate at a pitch pthat is narrower than the wavelength of the light in the used light region, and extend along the Y-direction. The projections have a laminated structure in which two or more sets of a dielectric layer and a conductive layer are laminated alternately along the Z-direction. The conductive layers include a first conductive layer having absorption properties relative to the light in the used light region and a second conductive layer having reflective properties relative to the light in the used light region. The first conductive layer is provided as the conductive layer closest to the incident side of the light.

Polarizing element having alternately laminated dielectric layers and conductive layers and method for manufacturing polarizing element

To provide a polarizing plate capable of excellently controlling reflectance characteristics, a polarizing plate manufacturing method, and an optical apparatus including the polarizing plate. Provided is a polarizing platewith a wire grid structure, including: a transparent substrateand a grid-shaped convex portionarranged on the transparent substrate at a pitch shorter than a wavelength of light of a use band and extending in a predetermined direction, wherein the grid-shaped convex portionincludes a reflection layer, a first dielectric layer, and an absorption layerin order from the transparent substrate, and wherein the reflection layer and the first dielectric layer have substantially the same width and a minimum width of the absorption layer is smaller than a minimum width of the reflection layer and the first dielectric layer as viewed from a predetermined direction.

Wire grid polarizing plate having trapezoidal absorption layer

A polarizing plate has a wire grid structure, and includes a transparent substrate, and a plurality of protrusions, which extend in a first direction (y-direction) on the transparent substrate and are periodically spaced apart from each other at a pitch that is shorter than a wavelength of a light in a use band, wherein each of the protrusions has a base shape portion which is formed having a width across the cross-section orthogonal to the first direction (y-direction) that narrows toward the tip, and a protruding portion which protrudes from the base shape portion and absorbs light having a wavelength in the use band.

Polarizing plate and optical apparatus containing same

Polarizing plate, polarizing plate manufacturing method, and optical apparatus having specified minimum width of absorption layer

A polarizing element includes: a transparent substrate; and grid-shaped convexities that are arranged on the transparent substrate at a smaller pitch than a wavelength of operating band light and that extend in a specific direction. The grid-shaped convexities include a reflection layer formed on the transparent substrate and grid tips formed with side surfaces that, when viewed in the specific direction, are inclined in a direction of tip tapering.

Polarizing element

Provided is a polarizing element having a wire grid structure. The polarizing element includes a transparent substrate () and grid-shaped protrusions () that are arranged on the transparent substrate () at a smaller pitch than a wavelength of operating band light and that extend in a specific direction. The grid-shaped protrusions () include a reflection layer () formed on the transparent substrate (). The reflection layer () includes a metal layer () and an oxide layer () that covers a side surface of the metal layer () as viewed in the specific direction and is formed from an oxide of a constituent metal of the metal layer ().

Polarizing element and method of producing same

Provided are a polarizing plate having high transmittance characteristics and excellent controllability of reflectance characteristics, a method of manufacturing the polarizing plate, and an optical apparatus including the polarizing plate. A polarizing plate having a wire grid structure includes a transparent substrate and grid-shaped protrusions that are arranged on the transparent substrate at a pitch shorter than a wavelength of light in a use band and extend in a predetermined direction, the grid-shaped protrusion includes, in order from the transparent substrate side, a reflection layer, a dielectric layer, and an absorption layer, a width of the reflection layer is smaller than a width of the dielectric layer, and a grid tip formed at a tip of the grid-shaped protrusion has a tapered shape where a side face thereof is inclined in such a direction that a width thereof is decreased toward a tip side when viewed from the predetermined direction.

Polarizing plate, method of manufacturing the same, and optical apparatus

Provided are a polarizing plate having high transmittance characteristics and excellent controllability of reflectance characteristics, a method of manufacturing the polarizing plate, and an optical apparatus including the polarizing plate. A polarizing plate having a wire grid structure includes a transparent substrate and grid-shaped protrusions that are arranged on the transparent substrate at a pitch shorter than a wavelength of light in a use band and extend in a predetermined direction, the grid-shaped protrusion includes, in order from the transparent substrate side, a pedestal, a reflection layer, a dielectric layer, and an absorption layer, and the pedestal has a trapezoidal shape when viewed from the extending direction of the grid-shaped protrusions.

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Tokyo, Japan

Tomu Takeda