Patents by Inventor Akio Takada

Akio Takada has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20200355860
    Abstract: Provided is a wire grid polarization plate that has heat resistance and excellent polarization properties, and has durability even in a thin wire structure with a small pitch, and an optical apparatus and a manufacturing method of a polarization plate. A periodic lamellar structure is formed with a material forming arrangement by self-assembling performance, and then, is metallized, and thus, metal wires arranged at a small pitch are prepared, and the obtained wires are fixed by a dielectric material.
    Type: Application
    Filed: May 5, 2020
    Publication date: November 12, 2020
    Applicant: Dexerials Corporation
    Inventors: Kazuyuki Shibuya, Shigeshi Sakakibara, Toshiaki Sugawara, Yusuke Matsuno, Akio Takada
  • Publication number: 20200341179
    Abstract: Provided is a polarizing plate having an appropriate reflectance characteristic formed from an inexpensive material by an inexpensive production device. In a polarizing plate having a wire grid structure including: a transparent substrate; and a grid-like projection that is arranged on the transparent substrate at a pitch smaller than a wavelength of light in a used band and extends in a predetermined direction, an absorption layer constituting the grid-like projection contains an impurity semiconductor obtained by adding a minute amount of a specific element to an intrinsic semiconductor.
    Type: Application
    Filed: May 29, 2019
    Publication date: October 29, 2020
    Applicant: Dexerials Corporation
    Inventors: Kazuyuki Shibuya, Shigeshi Sakakibara, Toshiaki Sugawara, Yusuke Matsuno, Akio Takada
  • Publication number: 20200326463
    Abstract: Provided are a thin film for optical element as a single-layer thin film which contains a Si simple substance, a Si compound excluding Si alloy, and a metal or metal compound, a method of manufacturing the thin film for optical element, and an optical element including the thin film for optical element. Further provided are an inorganic polarizing plate including a reflection suppressing layer composed of the thin film for optical element, a method of manufacturing the inorganic polarizing plate, and an optical device including the inorganic polarizing plate.
    Type: Application
    Filed: April 6, 2020
    Publication date: October 15, 2020
    Applicant: Dexerials Corporation
    Inventors: Toshiaki Sugawara, Akio Takada
  • Patent number: 10732335
    Abstract: Provided are a polarizing plate having excellent optical characteristics, and a method for manufacturing the polarizing plate. The present invention is provided with: a translucent substrate through which light passes in a working band; a bundle structure layer constituted of a columnar sheaf comprising one or more material from among dielectrics, metals, and semiconductors, the bundle structure layer being formed on the translucent substrate; an absorption layer formed on the bundle structure layer; a dielectric layer formed on the absorption layer; and a reflection layer formed on the dielectric layer and arranged as a one-dimensional lattice at a pitch that is smaller than the wavelength of the light in the working band. Because the bundle structure layer increases light absorption and light scattering, the result is that reflectivity can be reduced and excellent optical characteristics obtained.
    Type: Grant
    Filed: July 11, 2014
    Date of Patent: August 4, 2020
    Assignee: Dexerials Coporation
    Inventors: Akio Takada, Eiji Takahashi, Nobuyuki Koike, Koji Sasaki
  • Publication number: 20200209451
    Abstract: Provided is a polarizing plate that is a polarizing plate having a wire grid structure, and includes a transparent substrate and a plurality of protrusions that extend in a first direction on the transparent substrate and are periodically arranged at a pitch shorter than a wavelength of light in a use band. Each of the protrusions includes a reflective layer, a multilayer film, and an optical property improving layer located between the reflective layer and the multilayer film. The optical property improving layer contains an oxide that contains a constituent element of which the reflective layer is composed. An etching rate of the optical property improving layer with respect to a chlorine-based gas is no less than 6.7 times and no more than 15 times an etching rate of the multilayer film.
    Type: Application
    Filed: July 30, 2019
    Publication date: July 2, 2020
    Inventors: Kazuyuki Shibuya, Shigeshi Sakakibara, Toshiaki Sugawara, Yusuke Matsuno, Akio Takada
  • Publication number: 20200188989
    Abstract: A method for producing molding sand includes mixing an artificial sand with a furan resin composition including a furan resin precursor, and mixing a curing agent with the artificial sand with which the furan resin composition is mixed, wherein the curing agent includes xylene sulfonic acid.
    Type: Application
    Filed: February 27, 2018
    Publication date: June 18, 2020
    Applicant: DAIHATSU MOTOR CO., LTD.
    Inventors: Takanobu KAWAKAMI, Katsushi MORITA, Akio YAMAKAWA, Kazuki TAKADA
  • Publication number: 20200166129
    Abstract: A control system for a four-wheel drive vehicle configured to improve energy efficiency by avoiding selection of a four-wheel drive mode more than necessary. The control system comprises a controller that shifts an operating mode between a two-wheel drive mode and a four-wheel drive mode. When a control of the prime mover is terminated, the controller detects the operating mode selected by a switch before restarting the control of the prime mover. If the two-wheel drive mode or the four-wheel drive mode was selected by the switch before restarting the control of the prime mover, the controller selects the two-wheel drive mode when restarting the control of the prime mover.
    Type: Application
    Filed: November 18, 2019
    Publication date: May 28, 2020
    Inventors: Norifumi TAKADA, Akio SUGAWARA
  • Publication number: 20200142118
    Abstract: Provided are a polarizing plate having excellent optical characteristics, and a method for manufacturing the polarizing plate. The present invention is provided with: a translucent substrate through which light passes in a working band; a bundle structure layer constituted of a columnar sheaf comprising one or more material from among dielectrics, metals, and semiconductors, the bundle structure layer being formed on the translucent substrate; an absorption layer formed on the bundle structure layer; a dielectric layer formed on the absorption layer; and a reflection layer formed on the dielectric layer and arranged as a one-dimensional lattice at a pitch that is smaller than the wavelength of the light in the working band. Because the bundle structure layer increases light absorption and light scattering, the result is that reflectivity can be reduced and excellent optical characteristics obtained.
    Type: Application
    Filed: November 6, 2019
    Publication date: May 7, 2020
    Applicant: Dexerials Corporation
    Inventors: Akio TAKADA, Eiji TAKAHASHI, Nobuyuki KOIKE, Koji SASAKI
  • Publication number: 20200132903
    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.
    Type: Application
    Filed: October 15, 2019
    Publication date: April 30, 2020
    Applicant: DEXERIALS CORPORATION
    Inventors: Kazuyuki SHIBUYA, Shigeshi SAKABARA, Toshiaki SUGAWARA, Yusuke MATSUNO, Akio TAKADA
  • Patent number: 10564477
    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.
    Type: Grant
    Filed: December 8, 2017
    Date of Patent: February 18, 2020
    Assignee: Dexerials Corporation
    Inventors: Nobuyuki Koike, Akio Takada
  • Patent number: 10479908
    Abstract: An aspect of the present invention relates to method of manufacturing a hard coat film, wherein the hard coat film comprises a plastic substrate and a hard coat layer, the method comprises forming the hard coat layer by subjecting a photopolymerizable hard coating composition to photopolymerization processing, and the photopolymerizable hard coating composition comprises a radical polymerizable compound having two or more radical polymerizable groups selected from the group consisting of acryloyloxy groups, acryloyl groups, methacryloyloxy groups, and methacryloyl groups per molecule, a cationic polymerizable compound, a radical photopolymerization initiator, and a cationic photopolymerization initiator.
    Type: Grant
    Filed: October 12, 2017
    Date of Patent: November 19, 2019
    Assignee: FUJIFILM Corporation
    Inventors: Akio Tamura, Katsuyuki Takada, Takayasu Yamazaki, Keisuke Oku, Keigo Ueki
  • Publication number: 20190331840
    Abstract: A polarizing plate capable of achieving high reliability and a method for manufacturing a polarizing plate. The polarizing plate includes a transparent substrate that is transparent to light of a used wavelength band; a metal grid in which a reflective layer made of a metal is arranged to extend in a predetermined direction on the transparent substrate at a pitch finer than a wavelength of light of the used band; a metal subgrid made of the same metal as the reflective layer formed on the metal grid at a pitch finer than that of the metal grid; and an absorbing layer made by filling a light absorbing material into a recess of the metal subgrid.
    Type: Application
    Filed: March 29, 2019
    Publication date: October 31, 2019
    Applicant: DEXERIALS CORPORATION
    Inventor: Akio TAKADA
  • Publication number: 20190324598
    Abstract: An optical film has a resin film and a hardcoat layer disposed on one surface of the resin film, in which the hardcoat layer contains a polysiloxane-containing compound and a fluorine-containing compound, and a film thickness of the resin film is equal to or greater than 80 ?m.
    Type: Application
    Filed: June 24, 2019
    Publication date: October 24, 2019
    Applicant: FUJIFILM Corporation
    Inventors: Keigo UEKI, Takashi TAMADA, Akio TAMURA, Yutaka NOZOE, Yuki NAKAZAWA, Yuichi FUKUSHIGE, Katsuyuki TAKADA
  • Patent number: 10441551
    Abstract: A patch comprises a backing and an adhesive layer laminated on at least one surface of the backing, in which the adhesive layer contains at least one selected from the group consisting of fentanyl and salts thereof, and contains an adhesive base material and an antioxidant having a sulfur atom in its molecule.
    Type: Grant
    Filed: October 24, 2016
    Date of Patent: October 15, 2019
    Assignee: HISAMITSU PHARMACEUTICAL CO., INC.
    Inventors: Atsushi Sonobe, Akio Takeuchi, Yasunori Takada
  • Patent number: 10436964
    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.
    Type: Grant
    Filed: February 5, 2018
    Date of Patent: October 8, 2019
    Assignee: Dexerials Corporation
    Inventors: Akio Takada, Seiji Kumagai, Hideto Sagawa, Takahiro Kimura, Kazuyuki Shibuya, Toshiaki Sugawara, Shigeshi Sakakibara, Yusuke Matsuno
  • Patent number: 10317599
    Abstract: A wavelength plate, wherein first birefringent layer and second birefringent layer are laminated such that in-plane directions of optical axes of first birefringent layer and second birefringent layer cross each other, wherein the wavelength plate satisfies formulae (1), (2), (3), and (4), and wherein at least one of first birefringent layer and second birefringent layer is obliquely-deposited birefringent layer formed by oblique deposition, ?n1×t1=?/2??(1) 1.7?(?n1×t1)/(?n2×t2)?2.
    Type: Grant
    Filed: March 15, 2016
    Date of Patent: June 11, 2019
    Assignee: DEXERIALS CORPORATION
    Inventors: Nobuyuki Koike, Masatoshi Sasaki, Akio Takada
  • Publication number: 20190094438
    Abstract: To provide a polarizing plate and an optical apparatus capable of improving durability while maintaining excellent optical characteristics. Provided is a polarizing plate 1 with a wire grid structure, including: a transparent substrate 10; and a grid-shaped convex portion 11 which is arranged on the transparent substrate 10 at a pitch P shorter than a wavelength of light of a use band, extends in a predetermined direction, and includes a reflection layer 12 formed of a light reflective material, wherein a surface of the grid-shaped convex portion 11 and a surface of a bottom surface portion of a groove formed between the grid-shaped convex portions 11 are provided with a protection film 20 which covers the surfaces thereof and the protection film 20 is formed by two kinds or more of protection films including an organic film formed of an organic material.
    Type: Application
    Filed: September 28, 2018
    Publication date: March 28, 2019
    Applicant: Dexerials Corporation
    Inventors: Akio Takada, Kazuyuki Shibuya, Shigeshi Sakakibara, Toshiaki Sugawara, Yusuke Matsuno
  • Publication number: 20190049643
    Abstract: Provided is a polarizing plate having a wire grid structure, including: a transparent substrate; grid-shaped protrusions that are arranged in a one-dimensional grid shape on the transparent substrate at a pitch shorter than a wavelength of light in a use band and extend in a predetermined direction, in which the grid-shaped protrusions include a first grid-shaped protrusion group arranged, at a first pitch P1 and a second grid-shaped protrusion group arranged at a second pitch P2 between the adjacent grid-shaped protrusions of the first grid-shaped protrusion group, and in which a width W1 of the grid-shaped protrusion in the first grid-shaped protrusion group is larger than a width W2 of the grid-shaped protrusion in the second grid-shaped protrusion group. In addition, provided is an optical device including the polarizing plate.
    Type: Application
    Filed: August 8, 2018
    Publication date: February 14, 2019
    Applicant: Dexerials Corporation
    Inventor: Akio Takada
  • Patent number: 10185067
    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.
    Type: Grant
    Filed: June 5, 2017
    Date of Patent: January 22, 2019
    Assignee: DEXERIALS CORPORATION
    Inventors: Akio Takada, Eiji Takahashi
  • Publication number: 20180306404
    Abstract: There is provided a method to manufacture a diffuser plate with better productivity and exhibiting an excellent diffusion property and having excellent durability with respect to light having large coherence, the microlens array diffuser plate including: a microlens group positioned on a surface of a transparent substrate. The diffuser plate includes two or more unit cells that are continuously set in array, the unit cell includes a plurality of microlenses positioned on the surface of the transparent substrate, and ridge lines between the microlenses adjacent to each other are nonparallel to each other, and are nonparallel to the transparent substrate.
    Type: Application
    Filed: October 3, 2016
    Publication date: October 25, 2018
    Applicant: DEXERIALS CORPORATION
    Inventors: Naoki HANASHIMA, Akio TAKADA, Kazuyuki SHIBUYA, Yusuke MATSUNO