Patents by Inventor Naoki Hanashima

Naoki Hanashima 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).

  • Patent number: 11002993
    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.
    Type: Grant
    Filed: June 17, 2016
    Date of Patent: May 11, 2021
    Assignee: Dexerials Corporation
    Inventors: Akio Takada, Eiji Takahashi, Nobuyuki Koike, Koji Sasaki, Naoki Hanashima
  • Publication number: 20210132262
    Abstract: The micro-lens array is a micro-lens array in which a plurality of micro-lenses are arranged in a matrix in a plan view, wherein each of the plurality of micro-lenses has four main sides in a plan view, and each of the four main sides is inclined with respect to a row virtual line parallel to a row direction or a column virtual line parallel to a column direction.
    Type: Application
    Filed: November 2, 2020
    Publication date: May 6, 2021
    Inventors: Kazuyuki Shibuya, Shunsuke Kanasugi, Mitsuo Arima, Naoki Hanashima
  • Publication number: 20210003746
    Abstract: In order to provide an optical device and a diffusion plate which has high transmittance and is capable of reducing speckle noise, the present it is a diffusion plate 1 in which a plurality of microlens cells 11 are arranged on both surfaces of a transparent substrate 10, the diffusion plate 1 having a first microlens array 12A which is formed on one surface of the transparent substrate 10 and comprises a plurality of concave or convex microlens cells 11, and a second microlens array 12B which is formed on the other surface on the reverse side from the one surface and comprises a plurality of concave or convex microlens cells 11, and the diffusion plate 1 being configured so that light emitted from the microlens cells 11 constituting the first microlens array 12A is incident on the microlens cells 11 constituting the second microlens array 12B.
    Type: Application
    Filed: January 21, 2019
    Publication date: January 7, 2021
    Applicant: Dexerials Corporation
    Inventors: Kazuyuki Shibuya, Katsuhiro Shindo, Naoki Hanashima, Yusuke Matsuno
  • Publication number: 20200310020
    Abstract: There is provided a novel and improved optical body, method for manufacturing an optical body, light-emitting apparatus, and display apparatus for amusement equipment capable of improving emitted luminance and transparency, the optical body including: a base material; and a light extraction section, formed on at least one surface of the base material, that extracts internally propagated light incident inside the base material from a side face of the base material to an outside of the base material. The light extraction section includes a concave-convex structure in which at least one of concavities and convexities has a frustum shape, a fill ratio of the concave-convex structure is 15% or greater, and a light transmittance is 50% or greater.
    Type: Application
    Filed: October 5, 2018
    Publication date: October 1, 2020
    Applicant: DEXERIALS CORPORATION
    Inventors: Koji SASAKI, Hiroshi SUGATA, Naoki HANASHIMA
  • Publication number: 20200278583
    Abstract: There is provided a novel and improved optical body, method for manufacturing an optical body, light-emitting apparatus, and image display apparatus capable of improving emitted luminance and transparency, the optical body including: a base material; and a light extraction section, formed on at least one surface of the base material, that extracts internally propagated light incident inside the base material from a side face of the base material to an outside of the base material. The light extraction section includes a concave-convex structure in which at least one of concavities and convexities has a frustum shape, a fill ratio of the concave-convex structure is 15% or greater, and a light transmittance is 50% or greater.
    Type: Application
    Filed: October 5, 2018
    Publication date: September 3, 2020
    Applicant: DEXERIALS CORPORATION
    Inventors: Koji SASAKI, Hiroshi SUGATA, Naoki HANASHIMA
  • Patent number: 10732341
    Abstract: There is provided an optical body including: a base material; a second optical layer, formed on at least one surface of the base material, that reduces a reflection of extraneous light; and a first optical layer, laminated on top of a part of the second optical layer, that extracts internally propagating light incident inside the base material from a side face of the base material to an outside of the base material. On a surface of the first optical layer, a first concave-convex structure that reflects the internally propagating light is formed.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: August 4, 2020
    Assignee: DEXERIALS CORPORATION
    Inventors: Koji Sasaki, Hiroshi Sugata, Naoki Hanashima
  • Publication number: 20200217992
    Abstract: Provided is a fine concave-convex laminate that is reduced in thickness, has excellent antireflection performance, and can suppress scattering and absorption of short-wavelength light. A fine concave-convex laminate comprises a substrate, a first transparent organic layer, and a second transparent organic layer laminated in the stated order, wherein the first transparent organic layer has a fine concave-convex structure at a surface facing the second transparent organic layer, the second transparent organic layer has fine concave-convex structures at both surfaces, and a thickness of a composite layer composed of the first transparent organic layer and the second transparent organic layer is 15 ?m or less.
    Type: Application
    Filed: June 29, 2018
    Publication date: July 9, 2020
    Applicant: Dexerials Corporation
    Inventors: Shunichi KAJIYA, Kazuya HAYASHIBE, Naoki HANASHIMA, Hiroshi SUGATA
  • Patent number: 10656318
    Abstract: There is provided an optical body including: a base material; and a light extraction unit that is formed on a surface of the base material and that extracts, to an outside of the base material, internally propagating light that is injected in an inside of the base material from a side surface of the base material. The light extraction unit is formed of a convex microlens array, and a maximum inclination angle of the convex microlens array substantially coincides with a maximum propagation angle of the internally propagating light.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: May 19, 2020
    Assignee: DEXERIALS CORPORATION
    Inventors: Naoki Hanashima, Koji Sasaki
  • Patent number: 10599022
    Abstract: There is provided a diffuser plate, a display device, a projection device, and a lighting device that can achieve flat diffusion angle distribution characteristics while reducing a high-order diffraction component, the diffuser plate including: a single lens group positioned on a surface of a transparent substrate, in which curvature radii of respective single lenses composing the single lens group are varied as a whole, and peak positions of the respective single lenses are located irregularly, and a lens surface shape of at least one of the single lenses in the single lens group satisfies Equation 1 and Equation 2.
    Type: Grant
    Filed: June 23, 2016
    Date of Patent: March 24, 2020
    Assignee: DEXERIALS CORPORATION
    Inventor: Naoki Hanashima
  • Publication number: 20190250313
    Abstract: There is provided a microlens array diffuser plate including: a microlens group positioned on a surface of a transparent substrate. The microlens group at least corresponding to a light ray entering part in the microlens array diffuser plate includes two or more unit cells that are continuous in an array sequence, and the unit cells include a plurality of microlenses positioned on the surface of the transparent substrate.
    Type: Application
    Filed: February 11, 2019
    Publication date: August 15, 2019
    Applicant: DEXERIALS CORPORATION
    Inventors: Kazuyuki SHIBUYA, Hideto SAGAWA, Takahiro KIMURA, Naoki HANASHIMA
  • Patent number: 10295716
    Abstract: An inorganic polarizing plate, containing: substrate transparent to light of bandwidth for use; and wire grid layer containing metal wires aligned on the substrate with gaps shorter than wavelength of the light, the plate satisfying formulae (1) to (3): 0 nm<(DR?DL)??Formula (1); 0 nm<|GR?GL|??Formula (2); and 0.90?SR/SL?1.30??Formula (3), where DL is distance along thickness direction of the substrate in region RL between one metal wire W and metal wire WL next to W in the wire grid layer, and DR is distance along the thickness direction of the substrate in region RR between W and metal wire WR provided next to W and at opposite side to side where WL is provided; GL is gap between W and WL, and GR is gap between W and WR; and SL is ratio of DL to GL, and SR is ratio of DR to GR.
    Type: Grant
    Filed: May 12, 2015
    Date of Patent: May 21, 2019
    Assignee: DEXERIALS CORPORATION
    Inventor: Naoki Hanashima
  • Publication number: 20190101685
    Abstract: There is provided an optical body including: a base material; a second optical layer, formed on at least one surface of the base material, that reduces a reflection of extraneous light; and a first optical layer, laminated on top of a part of the second optical layer, that extracts internally propagating light incident inside the base material from a side face of the base material to an outside of the base material. On a surface of the first optical layer, a first concave-convex structure that reflects the internally propagating light is formed.
    Type: Application
    Filed: September 28, 2018
    Publication date: April 4, 2019
    Applicant: DEXERIALS CORPORATION
    Inventors: Koji SASAKI, Hiroshi SUGATA, Naoki HANASHIMA
  • Publication number: 20190101684
    Abstract: There is provided an optical body including: a base material; and a light extraction unit that is formed on a surface of the base material and that extracts, to an outside of the base material, internally propagating light that is injected in an inside of the base material from a side surface of the base material. The light extraction unit is formed of a convex microlens array, and a maximum inclination angle of the convex microlens array substantially coincides with a maximum propagation angle of the internally propagating light.
    Type: Application
    Filed: September 28, 2018
    Publication date: April 4, 2019
    Applicant: DEXERIALS CORPORATION
    Inventors: Naoki HANASHIMA, Koji SASAKI
  • 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
  • Publication number: 20180203334
    Abstract: There is provided a diffuser plate, a display device, a projection device, and a lighting device that can achieve flat diffusion angle distribution characteristics while reducing a high-order diffraction component, the diffuser plate including: a single lens group positioned on a surface of a transparent substrate, in which curvature radii of respective single lenses composing the single lens group are varied as a whole, and peak positions of the respective single lenses are located irregularly, and a lens surface shape of at least one of the single lenses in the single lens group satisfies Equation 1 and Equation 2.
    Type: Application
    Filed: June 23, 2016
    Publication date: July 19, 2018
    Applicant: DEXERIALS CORPORATION
    Inventor: Naoki HANASHIMA
  • Patent number: 9594275
    Abstract: The present application provides a retardation element, having a first birefringent layer; and a second birefringent layer which has approximately the same average thickness as that of the first birefringent layer and contacts the first birefringent layer such that an angle formed between a first line segment representing the principal axis of refractive index anisotropy of the first birefringent layer and a second line segment representing the principal axis of refractive index anisotropy of the second birefringent layer is neither 0° nor 180° when the first line segment and the second line segment are projected on the transparent substrate such that an end A of the first line segment at a side of the transparent substrate and an end B of the second line segment at a side of the transparent substrate coincide with each other.
    Type: Grant
    Filed: September 23, 2014
    Date of Patent: March 14, 2017
    Assignee: DEXERIALS CORPORATION
    Inventors: Nobuyuki Koike, Akio Takada, Naoki Hanashima
  • Publication number: 20160370608
    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.
    Type: Application
    Filed: June 17, 2016
    Publication date: December 22, 2016
    Applicant: Dexerials Corporation
    Inventors: Akio TAKADA, Eiji TAKAHASHI, Nobuyuki KOIKE, Koji SASAKI, Naoki HANASHIMA
  • Publication number: 20150331166
    Abstract: An inorganic polarizing plate, containing: substrate transparent to light of bandwidth for use; and wire grid layer containing metal wires aligned on the substrate with gaps shorter than wavelength of the light, the plate satisfying formulae (1) to (3): 0 nm<(DR?DL)??Formula (1); 0 nm<|GR?GL|??Formula (2); and 0.90?SR/SL?1.30??Formula (3), where DL is distance along thickness direction of the substrate in region RL between one metal wire W and metal wire WL next to W in the wire grid layer, and DR is distance along the thickness direction of the substrate in region RR between W and metal wire WR provided next to W and at opposite side to side where WL is provided; GL is gap between W and WL, and GR is gap between W and WR; and SL is ratio of DL to GL, and SR is ratio of DR to GR.
    Type: Application
    Filed: May 12, 2015
    Publication date: November 19, 2015
    Applicant: DEXERIALS CORPORATION
    Inventor: Naoki HANASHIMA
  • Patent number: 9097857
    Abstract: A polarizing plate with high reliability even under a high-temperature or high-humidity environment is provided. A substrate has a non-formation region on a circumferential edge part, the non-formation region where a grid is not formed.
    Type: Grant
    Filed: May 31, 2011
    Date of Patent: August 4, 2015
    Assignee: DEXERIALS CORPORATION
    Inventor: Naoki Hanashima
  • Publication number: 20150092117
    Abstract: Provided is a retardation element, including: a transparent substrate; a retardation imparting antireflection layer; a first birefringent layer; and a second birefringent layer which has approximately the same average thickness as that of the first birefringent layer and contacts the first birefringent layer such that an angle formed between a first line segment representing the principal axis of refractive index anisotropy of the first birefringent layer and a second line segment representing the principal axis of refractive index anisotropy of the second birefringent layer is neither 0° nor 180° when the first line segment and the second line segment are projected on the transparent substrate such that an end A of the first line segment at a side of the transparent substrate and an end B of the second line segment at a side of the transparent substrate coincide with each other.
    Type: Application
    Filed: September 23, 2014
    Publication date: April 2, 2015
    Inventors: Nobuyuki Koike, Akio Takada, Naoki Hanashima