公开(公告)号：US10042176B2

公开(公告)日：2018-08-07

申请号：US14892935

申请日：2014-06-27

Applicant: DEXERIALS CORPORATION

Inventor： Koji Sasaki ,  Masatoshi Sasaki ,  Nobuyuki Koike ,  Akio Takada ,  Katsuhiro Shindo ,  Toshiaki Sugawara ,  Kouichi Miyagi ,  Masahiro Oowada

IPC: G02B27/28 ,  G02B1/14 ,  G02B5/30 ,  C09J183/04 ,  G02B5/04

Abstract: This invention provides a polarization conversion element that is highly resistant to the heat and light that result from increased brightness levels. In said polarization conversion element, inorganic half-wave plates provided selectively on the output surface of a polarizing beam-splitter array have obliquely deposited layers comprising a dielectric material and the side surfaces of said obliquely deposited layers are covered by protective films.

公开(公告)号：US20180164642A1

公开(公告)日：2018-06-14

申请号：US15836527

申请日：2017-12-08

Applicant: Dexerials Corporation

Inventor： Nobuyuki Koike ,  Akio Takada

IPC: G02F1/13363 ,  G02F1/00 ,  G02F1/03 ,  G02F1/139

Abstract: An object is to provide a phase difference compensation element capable of improving the contrast of a liquid crystal display device while solving the problems of a high cost, an increase in the lead time, an increase in the mounting space, and the durability. A phase difference compensation element includes: a phase difference imparting and reflection preventing layer; a first birefringence layer and a second birefringence layer in which an angle of a corner formed by a main axis of refractive index anisotropy and a surface of a transparent substrate is not 90 degrees; a third birefringence layer in which an angle of a corner formed by a main axis of refractive index anisotropy and the surface of the transparent substrate is 0 degrees, wherein, when segments acquired when the main axes of the first, second, and third birefringence layers are projected onto the transparent substrate are respectively denoted by a segment A, a segment B, and a segment C, relations of the following (1) and (2) are satisfied. (1) The angle of the corner formed by the segment A and the segment B is 45 degrees or more and 70 degrees or less. (2) The segment A and the segment C are approximately parallel with each other, or the segment B and the segment C are approximately parallel with each other.

公开(公告)号：US11971568B2

公开(公告)日：2024-04-30

申请号：US17058396

申请日：2019-05-20

Applicant: Dexerials Corporation

Inventor： Kazuyuki Shibuya ,  Shigeshi Sakakibara ,  Toshiaki Sugawara ,  Yusuke Matsuno ,  Akio Takada

IPC: G02B5/30

CPC classification number: G02B5/3058

Abstract: A polarizing plate may have high transmittance characteristics and suppressed reflected light. An optical device may be provided with the polarizing plate. The polarizing plate may have a wire grid structure that includes a transparent substrate and grid-like projection portions arranged on the transparent substrate at a pitch shorter than the wavelength of light in a used bandwidth and extending in a predetermined direction. The grid-like projection portions may each have a reflective layer and a dielectric layer in order from the transparent substrate side. When viewed from the predetermined direction, the reflective layer has may have a step on the side thereof and may have the largest bottom width on the transparent substrate side.

公开(公告)号：US11841560B2

公开(公告)日：2023-12-12

申请号：US17178244

申请日：2021-02-18

Applicant: Dexerials Corporation

Inventor： Akio Takada ,  Eiji Takahashi ,  Nobuyuki Koike ,  Koji Sasaki ,  Naoki Hanashima

IPC: G02F1/01 ,  G02B5/30 ,  G02B1/14 ,  G02F1/1335

CPC classification number: G02F1/0136 ,  G02B5/3083 ,  G02B1/14 ,  G02F1/1335

Abstract: Provided is a depolarizing plate having a superior degree of depolarization to conventional depolarizing plates. The depolarizing plate includes a light-transmitting substrate having a surface layer portion in which a fine pattern is provided that includes a plurality of curved lines randomly disposed at a pitch of no greater than a wavelength of light, and that exhibits structural birefringence.

公开(公告)号：US11500140B2

公开(公告)日：2022-11-15

申请号：US16755441

申请日：2019-07-25

Applicant: DEXERIALS CORPORATION

Inventor： Kazuyuki Shibuya ,  Shigeshi Sakakibara ,  Toshiaki Sugawara ,  Yusuke Matsuno ,  Akio Takada

IPC: G02B5/30 ,  G02F1/1335 ,  G02B1/118

Abstract: A polarizing plate includes a substrate and a plurality of projections which protrude with respect to the substrate, in which the plurality of projections are formed by periodically arraying projections extending in a first direction in plan view, each of the projections includes a reflective layer and a tip end portion, the tip end portion is arranged at a position further away from the substrate than the reflective layer, the tip end portion is continuously widened from a first end portion, which is a tip end, to a second end portion on a side close to the substrate in a first cut plane perpendicular to the substrate and the first direction, and a first surface of the tip end portion includes a continuous first curved surface.

公开(公告)号：US11385389B2

公开(公告)日：2022-07-12

申请号：US16601672

申请日：2019-10-15

Applicant: DEXERIALS CORPORATION

Inventor： Kazuyuki Shibuya ,  Shigeshi Sakabara ,  Toshiaki Sugawara ,  Yusuke Matsuno ,  Akio Takada

IPC: G02B1/18 ,  G02B5/30 ,  G02F1/1335 ,  G02B1/14

Abstract: Provided are a polarizing plate having excellent optical properties and durability, and a method for manufacturing the polarizing plate. The polarizing plate includes: a transparent substrate transparent to light in a used wavelength band; lattice-shaped protrusions arranged on the transparent substrate at a pitch shorter than the wavelength of light in the used wavelength band, extending in a predetermined direction, and having a reflective layer, a first dielectric layer, an absorbing layer, and a second dielectric layer in this order; a dielectric portion consisting of a dielectric discontinuously formed on a surface of the lattice-shaped protrusions and a surface of a bottom floor between the lattice-shaped protrusions; and a water-repellent portion formed on a surface of the dielectric portion and having water-repellent properties.

公开(公告)号：US10564477B2

公开(公告)日：2020-02-18

申请号：US15836527

申请日：2017-12-08

Applicant: Dexerials Corporation

Inventor： Nobuyuki Koike ,  Akio Takada

IPC: G02F1/13363 ,  G02F1/00 ,  G02F1/139 ,  G02F1/03 ,  G02B5/30 ,  G03B21/00

Abstract: An object is to provide a phase difference compensation element capable of improving the contrast of a liquid crystal display device while solving the problems of a high cost, an increase in the lead time, an increase in the mounting space, and the durability. A phase difference compensation element includes: a phase difference imparting and reflection preventing layer; a first birefringence layer and a second birefringence layer in which an angle of a corner formed by a main axis of refractive index anisotropy and a surface of a transparent substrate is not 90 degrees; a third birefringence layer in which an angle of a corner formed by a main axis of refractive index anisotropy and the surface of the transparent substrate is 0 degrees, wherein, when segments acquired when the main axes of the first, second, and third birefringence layers are projected onto the transparent substrate are respectively denoted by a segment A, a segment B, and a segment C, relations of the following (1) and (2) are satisfied. (1) The angle of the corner formed by the segment A and the segment B is 45 degrees or more and 70 degrees or less. (2) The segment A and the segment C are approximately parallel with each other, or the segment B and the segment C are approximately parallel with each other.

公开(公告)号：US10436964B2

公开(公告)日：2019-10-08

申请号：US15888332

申请日：2018-02-05

Applicant: Dexerials Corporation

Inventor： Akio Takada ,  Seiji Kumagai ,  Hideto Sagawa ,  Takahiro Kimura ,  Kazuyuki Shibuya ,  Toshiaki Sugawara ,  Shigeshi Sakakibara ,  Yusuke Matsuno

IPC: G02B5/30 ,  G02B1/14

Abstract: Provided is an inorganic polarizing plate having a wire grid structure including: a transparent substrate; and grid-shaped protrusions arranged on the transparent substrate at a pitch shorter than a wavelength of light in a use band, in which the grid-shaped-protrusion includes, in order from the transparent substrate side, a reflection layer and a reflection suppressing layer which includes a dielectric material and a non-dielectric material and of which a content of the non-dielectric material increases as a separation from the reflection layer increases. In addition, provided are a method of manufacturing the inorganic polarizing plate and an optical instrument including the inorganic polarizing plate.

公开(公告)号：US10185067B2

公开(公告)日：2019-01-22

申请号：US15613824

申请日：2017-06-05

Applicant: DEXERIALS CORPORATION

Inventor： Akio Takada ,  Eiji Takahashi

IPC: G02B5/30

Abstract: A polarizing plate having an excellent optical property and a method of manufacturing the same. The polarizing plate includes: a transparent substrate transmitting light in a used bandwidth; an absorbing layer having at least a metal-containing semiconductor layer containing a metal, the absorbing layer being arranged as a one-dimensional lattice shaped wire-grid structure having a pitch smaller than the wavelength of the light in the used bandwidth; a dielectric layer arranged as a one-dimensional lattice shaped wire-grid structure having a pitch smaller than the wavelength of light in the used bandwidth; and a reflective layer arranged as a one-dimensional lattice shaped wire-grid structure having a pitch smaller than the wavelength of light in the used bandwidth, wherein the absorbing layer, the dielectric layer and the reflective layer are layered on the transparent substrate in this or reversed order.

公开(公告)号：US09477024B2

公开(公告)日：2016-10-25

申请号：US13975805

申请日：2013-08-26

Applicant: DEXERIALS CORPORATION

Inventor： Eiji Takahashi ,  Akio Takada

IPC: G02B5/30 ,  G02F1/1335

CPC classification number: G02B5/3058 ,  G02F2001/133548

Abstract: A polarizing element includes a transparent substrate, a reflective layer constituting, on the transparent substrate, grid-shaped convexities arrayed at a pitch smaller than a wavelength in a used optical bandwidth, a dielectric layer formed on the reflective layer, a diffusion barrier layer formed on the dielectric layer, and an absorbing layer formed on the diffusion barrier layer such that the diffusion barrier layer is sandwiched between the absorbing layer and the dielectric layer. This polarizing element has an excellent optical property and is able to prevent mixing of the absorbing layer and the dielectric layer under a high temperature.

Abstract translation: 偏振元件包括透明基板，在透明基板上构成以比所使用的光学带宽中的波长小的间距排列的格子状凸起的反射层，形成在反射层上的电介质层，形成的扩散阻挡层 以及形成在扩散阻挡层上的吸收层，使得扩散阻挡层夹在吸收层和电介质层之间。 该偏光元件具有优异的光学特性，并且能够防止吸收层和介电层在高温下的混合。