Oriented Particles Patents (Class 359/487.06)
  • Patent number: 11204520
    Abstract: Provided is a polarizing plate for a light-emitting diode and a light-emitting display device including the same, the polarizing plate comprising a polarizing film and a liquid crystal retardation film, wherein the liquid crystal retardation film comprises a laminate made of: a second retardation film having a discotic liquid crystal of which an in-plane retardation Re, in a wavelength of 550 nm, is approximately 220 nm to approximately 280 nm and a biaxial degree (NZ) is approximately 0 to approximately 0.3; and a first retardation film having a nematic liquid crystal of which an in-plane retardation Re, in a wavelength of 550 nm, is approximately 100 nm to approximately 150 nm and a biaxial degree (NZ) is approximately 0.3 to approximately 0.7.
    Type: Grant
    Filed: October 10, 2018
    Date of Patent: December 21, 2021
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Sang Hum Lee, Kenji Hamada, Jin Sook Kim, Jung Hun You, Jin Hee Choi
  • Patent number: 11125924
    Abstract: The present invention is a one-side-protected polarizing film having a polarizer and a protective film provided on only one surface of the polarizer, wherein the polarizer contains a polyvinyl alcohol-based resin, has a thickness of 10 ?m or less, and is configured so that optical properties represented by a single-body transmittance T and a polarization degree P satisfy the following relationship: P>?(100.929T?42.4?1)×100 (provided that T<42.3) or P?99.9 (provided that T?42.3), a transparent layer is provided on another surface of the polarizer, and a dynamic friction coefficient of the surface on which the protective film is provided is 0.2 or less. In this one-side-protected polarizing film, it is possible to resist the occurrence of through cracks and nano-slits even when the polarizer has specific optical properties and a thickness of 10 ?m or less.
    Type: Grant
    Filed: March 17, 2017
    Date of Patent: September 21, 2021
    Assignee: NITTO DENKO CORPORATION
    Inventors: Tomonori Ueno, Shinya Hiraoka, Hiromi Ikeshima, Atsushi Kishi
  • Patent number: 11079526
    Abstract: A polarizing film is disclosed including a polarizer having a thickness of 10 ?m or less, and a transparent resin layer on at least one surface of the polarizer, wherein the polarizer includes a polyvinyl alcohol-based resin, and has a single-body transmittance T and a polarization degree P representing optical properties satisfying the condition of the following formula: P>?(100.929T?42.4?1)×100 (provided that T<42.3) or P?99.9 (provided that T?42.3), and the transparent resin layer is a formed product of a transparent resin layer forming material including a water-based emulsion resin and has a hardness of 0.01 GPa or more. The polarizing film, using a thin-polarizer, can suppress the occurrence of defects such as nano-slits and is further restrained from being lowered in optical properties in a heating and humidifying test to have a high optical reliability.
    Type: Grant
    Filed: March 17, 2017
    Date of Patent: August 3, 2021
    Assignee: NITTO DENKO CORPORATION
    Inventors: Satoshi Mita, Tomonori Ueno, Jingfan Xu, Atsushi Kishi
  • Patent number: 10851469
    Abstract: A method of synthesizing of gold-silver core-shell nanoparticles, from a colloidal aqueous solution of gold seeds with surfactant, the gold-silver core-shell nanoparticles being produced from anisotropic gold seeds, said method comprising adding to the colloidal aqueous solution a precursor of silver and a reducing agent, to produce the deposition of silver on the gold seeds in a step called principal, characterized in that the method has an incubation step of the colloidal aqueous solution containing the gold seeds with surfactant in the DMSO, prior to the principal step.
    Type: Grant
    Filed: October 11, 2017
    Date of Patent: December 1, 2020
    Assignees: Universite Paris Diderot, Centre National de la Recherche Scientifique (CNRS), Institut De Physique Du Globe De Paris
    Inventors: Israa Haidar, Daniel Neuville, Leila Boubekeur, Nordin Felidj
  • Patent number: 10649122
    Abstract: The disclosure is directed to broadband, glass optical polarizers and to methods for making the glass optical polarizers. The glass optical polarizer includes a substantially bubble free fusion drawn glass having two pristine glass surfaces and a plurality of elongated zero valent metallic particle polarizing layers.
    Type: Grant
    Filed: November 9, 2018
    Date of Patent: May 12, 2020
    Assignee: Corning Incorporated
    Inventors: Nicholas Francis Borrelli, Nakia Leigh Heffner, Joseph Michael Matusick, Joseph Francis Schroeder, III, Thomas Philip Seward, III, Natesan Venkataraman
  • Patent number: 10551301
    Abstract: A brightness colorimeter having a measurement error caused by linearly polarized light, which is corrected, includes: a lens module to which light irradiated from one side is input; a polarization conversion module configured to intersect the light input through the lens module to convert polarization characteristics; a spectral module provided in one unit block to reflect and intersect the light input through the polarization conversion module so as to branch the light in different three directions; filter modules arranged on progress paths of the light branched in different three direction through the spectral module to intersect monochromatic light beams having specific spectra among the light branched in the three directions; and measurement modules arranged to correspond to exit angles of the monochromatic light beams penetrated through the filter modules, to measure at least one of a brightness, a chromaticity, and an error obtained by the monochromatic light beams.
    Type: Grant
    Filed: May 8, 2017
    Date of Patent: February 4, 2020
    Assignee: ANI. Co. Ltd.
    Inventors: Kyu Ho Lee, Kyu Seok Kim, Sang Woo Park, Seong Cheol Ji, Yong Hui Park, Seung Yub Choi
  • Patent number: 10532637
    Abstract: An anti-glaring light system and a vehicle are provided in the present disclosure. The system includes a light emitting device, configured to selectively emit first polarized light having a first polarization direction along a first light-emergent path or ordinary light along a second light-emergent path; and an eye-protection device, configured to block second polarized light having a second polarization direction incident into the eye-protection device, enable the first polarized light to pass through the eye-protection device and be propagated to eyes of a user along a first light-incident path, and enable the ordinary light to be propagated to the eyes of the user along a second light-incident path.
    Type: Grant
    Filed: January 29, 2019
    Date of Patent: January 14, 2020
    Assignees: CHENGDU BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Bo Shi, Yuanming Feng
  • Patent number: 10520772
    Abstract: A method disclosed herein includes applying a layer of photoalignment material on a non-flat optical surface, and exposing the layer of photoalignment material to alignment light that satisfies photoalignment criteria that are determined based on a representative thickness profile of a layer of liquid crystal material. The method also includes applying the layer of liquid crystal material over the layer of photoalignment material. Also disclosed is an optical element including a non-flat optical surface, a first layer of photoalignment material applied on the non-flat optical surface and a first layer of liquid crystal material. The layer of photoalignment material is aligned based on alignment light that satisfies photoalignment criteria that are determined based on a representative thickness profile of the layer of liquid crystal polymers.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: December 31, 2019
    Assignee: Facebook Technologies, LLC
    Inventors: Lu Lu, Mengfei Wang, Fenglin Peng, Wai Sze Tiffany Lam, Jacques Gollier
  • Patent number: 10186631
    Abstract: Squared-off semiconductor coatings for quantum dots (QDs) and the resulting quantum dot materials are described. In an example, a semiconductor structure includes a quantum dot structure having an outermost surface. A crystalline semiconductor coating is disposed on and completely surrounds the outermost surface of the quantum dot structure. The crystalline semiconductor coating has a geometry with squared-off ends.
    Type: Grant
    Filed: May 14, 2015
    Date of Patent: January 22, 2019
    Assignee: OSRAM Opto Semiconductors GmbH
    Inventors: Matthew J. Carillo, Steven Hughes
  • Patent number: 10113040
    Abstract: The polymer film comprises a carbonyl bond-containing polymer and a compound having ?h of equal to or higher than 11.0 and ?? of equal to or lower than 1.50, wherein the ?h is a value of hydrogen-bonding capacity calculated by Hoy method and the ?? is a value calculated by equation 1: ??=|x?13.3|??Equation 1 wherein, in equation 1, ? represents an interatomic distance in the polymer film between atoms most distant from each other among molecules in the compound, excluding a hydrogen atom, calculated by molecular dynamics calculation.
    Type: Grant
    Filed: September 2, 2015
    Date of Patent: October 30, 2018
    Assignee: FUJIFILM CORPORATION
    Inventors: Yasukazu Kuwayama, Nobutaka Fukagawa, Hiroshi Inada, Masaki Noro, Yoshitaka Maeda, Naozumi Shiraiwa, Yu Naito
  • Patent number: 9851473
    Abstract: There is provided an anti-reflection film that has an excellent reflection characteristic (low reflectivity) in a wide spectrum and has an excellent reflection hue that is close to neutral, and a method by which such anti-reflection film can be produced with high productivity and at a low cost. An anti-reflection film according to the present invention includes: a substrate; and a medium-refractive index layer, a high-refractive index layer, and a low-refractive index layer in the stated order from a substrate side. A refractive index nS of the substrate, a refractive index nM of the medium-refractive index layer, and a refractive index nH of the high-refractive index layer satisfy the following expression (1): n H - 1 n H + 1 - 1 - 4 ? n M 2 ? n S n M 2 ? ( 1 + n S ) 2 - ( 1 - n M 2 ) ? ( n M 2 - n S 2 ) ? 0.
    Type: Grant
    Filed: January 27, 2014
    Date of Patent: December 26, 2017
    Assignee: NITTO DENKO CORPORATION
    Inventors: Atsushi Kishi, Tomonori Ueno, Hiroki Kuramoto
  • Patent number: 9618668
    Abstract: A method of producing a roll of an optical film laminate strip including a polarizing film includes the steps of: forming a continuous web of optical film laminate including a polarizing film which consists of a polyvinyl alcohol type resin layer and has a thickness of 10 ?m or less, wherein the polarizing film is formed by performing an stretching sub-step of subjecting a laminate comprising a continuous web of thermoplastic resin substrate and a polyvinyl alcohol type resin layer formed on the substrate, to a uniaxial stretching in a lengthwise direction of the laminate based on 2-stage stretching consisting of preliminary in-air stretching and in-boric-acid-solution stretching; cutting the continuous web of optical film laminate along a direction parallel to the length direction to form at least one continuous web of laminate strip having a given width; and winding the continuous web of laminate strip having the given width into a roll.
    Type: Grant
    Filed: December 27, 2012
    Date of Patent: April 11, 2017
    Assignee: NITTO DENKO CORPORATION
    Inventors: Takeharu Kitagawa, Takuya Nakazono, Shusaku Goto, Minoru Miyatake, Tomohiro Mori, Takashi Kamijo
  • Patent number: 9442235
    Abstract: A method of producing a roll of a continuous web of an optical film laminate, usable in a process of laminating an optical film sheet including a polarizing film and formed to a size corresponding to that an optical panel to a surface of the optical panel being fed to a lamination position, is disclosed. The polarizing film is prepared by subjecting a laminate including a thermoplastic resin substrate and a PVA type resin layer formed on the substrate, to uniaxial 2-stage stretching to reduce a thickness of the PVA type resin layer to 10 ?m or less, and causing a dichroic material to be absorbed in the PVA type resin layer. A carrier film is releasably attached to the continuous web of optical film laminate including the polarizing film, through an adhesive layer. A defect inspection is performed for the optical film laminate and the adhesive layer.
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: September 13, 2016
    Assignee: NITTO DENKO CORPORATION
    Inventors: Takeharu Kitagawa, Takuya Nakazono, Shusaku Goto, Minoru Miyatake, Tomohiro Mori, Takashi Kamijo
  • Patent number: 9005493
    Abstract: A 3-d stereoscopic viewing lens which the retarder film is made of a PVA film. A 3-D stereoscopic viewing lens having a linear polarized film, one or more lens substrate layers, and an epoxy layer. A process of making retarder film including mounting a PVA film to an assembly line; wetting, cleaning, and washing the PVA film through said assembly line; softening, expanding and stretching the PVA film's x-axis through said assembly line; adding gap filling agent to the PVA film; stretching the PVA film's y-axis through a width frame holder and as a result transforming the PVA film into a retarder film.
    Type: Grant
    Filed: February 9, 2011
    Date of Patent: April 14, 2015
    Inventor: Roger Wen-Yi Hsu
  • Patent number: 8830578
    Abstract: An optical isolator 1 element comprises a Faraday rotator 11 that rotates a polarization plane of light; a first polarizer of optical absorption type 12 arranged on one surface side of the Faraday rotator 11, the first polarizer 12 having a layer in which metal particles are distributed; and a second polarizer of optical absorption type 13 arranged on another surface side of the Faraday rotator 11, the second polarizer 13 having a metal particle layer in which metal particles are distributed in a density higher than the density of metal particles distributed in the metal particle layer of the first polarizer 12. The optical isolator 1 makes it possible to reduce a deterioration of isolation caused by occurring a reflected light reflected between the second polarizer 13 and the first polarizer 12.
    Type: Grant
    Filed: March 19, 2010
    Date of Patent: September 9, 2014
    Assignee: Kyocera Corporation
    Inventors: Tomoyoshi Akashi, Kaichirou Nakashima, Michifumi Shouda
  • Patent number: 8804242
    Abstract: A polarizer includes a substrate, a carbon nanotube film, and a number of metal particles. The carbon nanotube film is located over the substrate and includes a number of carbon nanotube yarns, each of which comprises a number of substantially parallelly bundled carbon nanotubes. The metal particles are adhered to the carbon nanotubes of the carbon nanotube film.
    Type: Grant
    Filed: January 24, 2014
    Date of Patent: August 12, 2014
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Sei-Ping Louh
  • Publication number: 20140139920
    Abstract: A polarizer includes a substrate, a carbon nanotube film, and a number of metal particles. The carbon nanotube film is located over the substrate and includes a number of carbon nanotube yarns, each of which comprises a number of substantially parallelly bundled carbon nanotubes. The metal particles are adhered to the carbon nanotubes of the carbon nanotube film.
    Type: Application
    Filed: January 24, 2014
    Publication date: May 22, 2014
    Applicant: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventor: SEI-PING LOUH
  • Patent number: 8709567
    Abstract: A method of producing a roll of a continuous web of an optical film laminate, usable in a process of laminating an optical film sheet including a polarizing film and formed to a size corresponding to that an optical panel to a surface of the optical panel being fed to a lamination position, is disclosed. The polarizing film is prepared by subjecting a laminate including a thermoplastic resin substrate and a PVA type resin layer formed on the substrate, to uniaxial 2-stage stretching to reduce a thickness of the PVA type resin layer to 10 ?m or less, and causing a dichroic material to be absorbed in the PVA type resin layer. A carrier film is releasably attached to the continuous web of optical film laminate including the polarizing film, through an adhesive layer. A defect inspection is performed for the optical film laminate and the adhesive layer.
    Type: Grant
    Filed: September 2, 2011
    Date of Patent: April 29, 2014
    Assignee: Nitto Denko Corporation
    Inventors: Takeharu Kitagawa, Takuya Nakazono, Shusaku Goto, Minoru Miyatake, Tomohiro Mori, Takashi Kamijo
  • Patent number: 8693094
    Abstract: A method for manufacturing a polarizer utilizes a support, which is coated with a photoresist. A carbon nanotube film is located over the photoresist, and one portion of the carbon nanotube film is submerged in the photoresist. Metal or semi-metallic particles are deposited over the carbon nanotube film and the photoresist, which is removed. The carbon nanotube film with the metal particles or semi-metallic particles is adhered to a substrate to obtain the polarizer.
    Type: Grant
    Filed: May 16, 2010
    Date of Patent: April 8, 2014
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Sei-Ping Louh
  • Publication number: 20140085722
    Abstract: A pressure-sensitive adhesive layer-attached polarizing film of the present invention includes a polarizing film and a pressure-sensitive adhesive layer provided on the polarizing film, wherein the polarizing film includes a polarizer with a thickness of 10 ?m or less and a transparent protective film or films provided on one or both sides of the polarizer, and the pressure-sensitive adhesive layer is formed from a pressure-sensitive adhesive composition containing a (meth)acryl-based polymer (A) and an ionic compound (B). The pressure-sensitive adhesive layer-attached polarizing film has an antistatic function and exhibits durability.
    Type: Application
    Filed: May 18, 2012
    Publication date: March 27, 2014
    Applicant: NITTO DENKO CORPORATION
    Inventors: Atsushi Yasui, Yuusuke Toyama, Tomoyuki Kimura, Masayuki Satake, Shusaku Goto, Takeharu Kitagawa, Minoru Miyatake, Tomohiro Mori, Takashi Kamijo, Arata Fujihara
  • Patent number: 8551357
    Abstract: There is provided a method for manufacturing a thin polarizing film having an absorption axis oblique to a width direction of the film which comprises the steps of: performing an orientation treatment in two directions in a plane of a support film; applying a solution containing a lyotropic liquid crystal compound onto a surface of the support film; and causing a column-shaped aggregate of the lyotropic liquid crystal compound to be oriented in a direction (orientation direction) equal to the vector sum of a direction of first orientation treatment and a direction of second orientation treatment.
    Type: Grant
    Filed: February 17, 2010
    Date of Patent: October 8, 2013
    Assignee: Nitto Denko Corporation
    Inventors: Junzo Miyazaki, Tetsuo Inoue
  • Patent number: 8411360
    Abstract: Provided is a continuous web of polarizing film for an organic EL display device which has a thickness of 10 ?m or less and exhibits high optical characteristics. The polarizing film for an organic EL display device is made of a polyvinyl alcohol type resin having a molecularly oriented dichroic material, and formed through stretching to have a thickness of 10 ?m or less and exhibit optical characteristics satisfying the following conditions: T?42.5; and P?99.5, wherein T is a single layer transmittance, and P is a polarization rate. The polarizing film for an organic EL display device may be prepared by subjecting a laminate comprising a non-crystallizable ester type thermoplastic resin substrate and the polyvinyl alcohol type resin layer formed on the substrate, to 2-stage stretching consisting of preliminary in-air stretching and in-boric-acid-solution stretching.
    Type: Grant
    Filed: September 2, 2011
    Date of Patent: April 2, 2013
    Assignee: Nitto Denko Corporation
    Inventors: Takeharu Kitagawa, Tomohiro Mori, Yuji Miyaki, Shusaku Goto, Minoru Miyatake, Takashi Kamijo
  • Patent number: 8369013
    Abstract: A polarizing element includes: a substrate; a plurality of reflection layers that is arranged in a band shape at a predetermined interval on the substrate; dielectric layers that are formed on the reflection layers; and inorganic micro-particle layers that are formed on the dielectric layers by inorganic micro-particles having shape anisotropy in which a length of a diameter of the micro-particles in an arrangement direction of the reflection layers is longer than a length of a diameter of the micro-particles in a direction orthogonal to the arrangement direction of the reflection layers and has convex portions toward a side of a first adjacent reflection layer and a side of a second adjacent reflection layer.
    Type: Grant
    Filed: December 14, 2010
    Date of Patent: February 5, 2013
    Assignee: Seiko Epson Corporation
    Inventor: Daisuke Sawaki
  • Patent number: 8363319
    Abstract: A polarizing element includes: a substrate; a plurality of reflection layers that is arranged in a band shape at a predetermined interval on the substrate; dielectric layers that are formed on the reflection layers; and absorption layers on the dielectric layers that have convex portions disposed toward a side of a first adjacent reflection layer and a side of a second adjacent reflection layer.
    Type: Grant
    Filed: December 15, 2010
    Date of Patent: January 29, 2013
    Assignee: Seiko Epson Corporation
    Inventor: Daisuke Sawaki
  • Patent number: 8320042
    Abstract: A polarizing film includes a polyvinyl alcohol (PVA) type resin having a dichroic material impregnated therein. The polarizing film is formed by stretching the PVA type resin, such that the thickness of the polarizing film is decreased to 10 ?m or less, and. The polarizing film has optical properties which satisfy conditions represented by formulae: P>?(100.929T-42.4?1)×100 (where T<42.3); and P?99.9 (where T?42.3) where T represents a single layer transmittance and P a polarization rate. The polarizing film can be made by providing a laminate comprising a PVA type resin layer formed on a non-crystallizable ester type thermoplastic resin substrate.
    Type: Grant
    Filed: August 31, 2011
    Date of Patent: November 27, 2012
    Assignee: Nitto Denko Corporation
    Inventors: Shusaku Goto, Takeharu Kitagawa, Minoru Miyatake, Tomohiro Mori, Takashi Kamijo
  • Patent number: 8314987
    Abstract: A polarizing film includes a polyvinyl alcohol (PVA) type resin having a dichroic material impregnated therein. The polarizing film is formed by stretching the PVA type resin, such that the thickness of the polarizing film is decreased to 10 ?m or less, and. The polarizing film has optical properties which satisfy conditions represented by formulae: P>?(100.929T-42.4?1)×100 (where T<42.3); and P?99.9 (where T?42.3) where T represents a single layer transmittance and P a polarization rate. The polarizing film can be made by providing a laminate comprising a PVA type resin layer formed on a non-crystallizable ester type thermoplastic resin substrate.
    Type: Grant
    Filed: October 27, 2011
    Date of Patent: November 20, 2012
    Assignee: Nitto Denko Corporation
    Inventors: Shusaku Goto, Takeharu Kitagawa, Minoru Miyatake, Tomohiro Mori, Takashi Kamijo
  • Patent number: 8144398
    Abstract: A polarizing element includes fine metal particles formed in numerous regions that were occupied by respective substantially needle-like metal halide fine particles before reduction that are oriented and dispersed in a glass substrate such that the lengthwise directions thereof are almost the same, the fine metal particles being produced by heat-treating the glass substrate in a reducing atmosphere to reduce the substantially needle-like metal halide fine particles. The number of fine metal particles present in at least some of the numerous regions is two or more in each region, 90% or more of the regions each have a volume of 2,500 to 2,500,000 nm3, and the individual volumes of the fine metal particles present in each region are 4 to 40% of the volume of the region in 90% or more of the total number of the regions.
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: March 27, 2012
    Assignee: Hoya Candeo Optronics Corporation
    Inventors: Yoshitaka Yoneda, Michiyori Miura, Toshiaki Sonehara
  • Publication number: 20110317263
    Abstract: An antireflection film is provided and includes at least one layer containing fine pores. When a surface portion of the antireflection film comes into contact with water for 15 minutes and then the water is wiped away, the surface portion has a chromaticity change ?E of 0.45 or less, the chromaticity change ?E being a chromaticity change in a CIE1976 L*a*b* color space and measured under a standard light source D65.
    Type: Application
    Filed: September 6, 2011
    Publication date: December 29, 2011
    Applicant: FUJIFILM Corporation
    Inventors: Hiroyuki YONEYAMA, Akira Ikeda
  • Patent number: 8077389
    Abstract: A glass polarizer applicable to projection-type liquid crystal displays and the like and having an excellent transmittance and extinction ratio with respect to light in the visible light region (500 nm to 600 nm) using silver halide containing glass as a starting material is provided. A glass polarizer for visible light according to the present invention is a polarizer manufactured by heating and stretching borosilicate glass in which silver halide particles are dispersed and deposited by heat treatment and reducing at least a portion of silver halide particles oriented and stretched in the glass to produce metallic silver particles. An average transmittance (T? % 500 to 600 nm) in a wavelength range of 500 nm to 600 nm of light having a polarization plane perpendicular to a longitudinal direction of metallic silver particles having shape anisotropy that is uniaxially oriented and dispersed is 75% or more and an extinction ratio in the wavelength range is 25 dB or more.
    Type: Grant
    Filed: December 6, 2007
    Date of Patent: December 13, 2011
    Assignee: Okamoto Glass Co., Ltd.
    Inventors: Khaled Jabri, Atsushi Arai, Hiromichi Nishimura, Yoshihiko Noro, Dai Takeda
  • Patent number: 8077390
    Abstract: A method of producing an optical element that has spatial variation in refractive index includes providing a curable liquid crystal composition; applying a spatially varying electric field to the liquid crystal composition to induce a desired spatial variation in refractive index; and curing the liquid crystal composition while the electric field is still applied to fix the spatial variation in refractive index when the electric field is removed.
    Type: Grant
    Filed: August 14, 2006
    Date of Patent: December 13, 2011
    Inventor: Zsolt John Laczik
  • Publication number: 20110235176
    Abstract: There are disclosed an improved method for production of a polarizing glass having a high extinction ratio by facilitating control of the diameter of silver halide particles in a mother glass with high Ag concentration, and a polarizing glass produced by the method. The glass is a polarizing glass having dispersed and oriented geometrically anisotropic metallic silver particles at least in its surface layer, which is characterized by not containing TiO2 exceeding 1.7 wt % but containing not less than 0.4 wt % Ag, and in that Ag and halogens contained therein satisfy the following relations: the molar ratio of Ag/(Cl+Br) is 0.2 to 1.0; the molar ratio of Cl/(Cl+Br+F) 0.5 to 0.95; and the molar ratio of Br/(Cl+Br+F) 0.05 to 0.4. The method for production comprises the steps of drawing a glass containing dispersed AgClxBr1-x crystals, and then reducing it under a reducing atmosphere.
    Type: Application
    Filed: June 24, 2009
    Publication date: September 29, 2011
    Applicant: NIHON YAMAMURA GLASS CO., LTD.
    Inventors: Takurou Ikeda, Kozo Maeda, Toru Yano, Hitomi Matsumoto