Patents by Inventor Tatsuo Nagashima

Tatsuo Nagashima 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: 20210132273
    Abstract: An optical member includes a transparent substrate containing at least one substance selected from glass, a glass ceramic, silicon, and sapphire, and having an infrared high-transmittance region in which an optical transmittance is 78% or more in a wavelength band of 700 nm to 1800 nm; and an optical interference film disposed on a main surface of the transparent substrate corresponding to the infrared high-transmittance region, wherein a transmittance of light, of the optical member, of at least one wavelength ?3 in the wavelength band of 700 nm to 1800 nm in a region of the optical member corresponding to the infrared high-transmittance region of the transparent substrate has a minimum value of 86.5% or more and has a difference between the minimum value and a maximum value of 9% or less in a range where an incidence angle is from 0 degrees to 60 degrees.
    Type: Application
    Filed: January 11, 2021
    Publication date: May 6, 2021
    Applicant: AGC Inc.
    Inventors: Hiroyuki YAMAMOTO, Takahiro MASHIMO, Takuji OYAMA, Shinya TAHARA, Tatsuo NAGASHIMA
  • Publication number: 20200325063
    Abstract: To provide optical glass having high refractive index and low density and having favorable production properties. An optical glass having refractive index (nd) of from 1.71 to 2.00, density of at most 5.0 g/cm3, a temperature at which the viscosity of the glass is log ?=2 of from 750 to 1,200° C. and devitrification temperature of at most 1,300° C., and containing from 0% to 21.5% of TiO2 as represented by mol % based on oxides. The optical glass has high refractive index and low density, has favorable production properties, and is suitable as an optical member for wearable devices, for vehicles, for robots, etc.
    Type: Application
    Filed: May 7, 2020
    Publication date: October 15, 2020
    Applicant: AGC Inc.
    Inventors: Shinichi AMMA, Tatsuo NAGASHIMA
  • Publication number: 20200278483
    Abstract: The present invention relates to an optical glass having refractive index of 1.55 or more and having chromaticity b* that satisfies b*?4.8 under A light source in a CIELab representation. The present invention also relates to an optical glass having refractive index of 1.55 or more, having a ratio (b*/|a*|) of chromaticity b* to an absolute value of chromaticity a* that satisfies b*/|a*|?0.55 under A light source in a CIELab representation, and satisfying b*?0.1.
    Type: Application
    Filed: May 18, 2020
    Publication date: September 3, 2020
    Applicant: AGC INC.
    Inventors: Shinichi AMMA, Tatsuo NAGASHIMA
  • Publication number: 20200247712
    Abstract: An optical glass has a refractive index (nd) of 1.55 or more. A difference (Tf?Tg) between a fictive temperature (Tf) and a glass transition temperature (Tg) of the optical glass is 0° C. or more. The optical glass may have a crack initiation load L of 350 mN or more.
    Type: Application
    Filed: April 20, 2020
    Publication date: August 6, 2020
    Applicant: AGC INC.
    Inventors: Shinichi AMMA, Tatsuo NAGASHIMA
  • Publication number: 20200123044
    Abstract: An optical glass has a refractive index (nd) of 1.64 or more. A P value represented by the following formula (1) is in a range of 7.0<P value<10.0: P value=log(A450×P450+A550×P550+A650×P650+A750×P750) (1) A450, A550, A650 and A750 are absorbances of the optical glass with a plate thickness of 10 mm at a wavelength of 450 nm, 550 nm, 650 nm and 750 nm, respectively. P450, P550, P650 and P750 are radiances of light having a wavelength of 450 nm, 550 nm, 650 nm and 750 nm, respectively, at 1,300° C. according to Planck's radiation law. All of internal transmittances in terms of a 10-mm thickness at wavelengths of 450 nm, 550 nm, 650 nm and 750 nm are 91% or more.
    Type: Application
    Filed: December 17, 2019
    Publication date: April 23, 2020
    Applicant: AGC INC.
    Inventors: Shinichi AMMA, Tatsuo NAGASHIMA
  • Patent number: 10294144
    Abstract: There is provided an optical glass having high infrared transmittance and being useful as an on-vehicle infrared sensor and the like. An optical glass including, in expression of atomic %: Ge+Ga; 6% to 30%; S+Se+Te; 50% to 85%; and Ti; 0.001% to 0.5%, wherein a wavelength (?T10%) at a long-wavelength side end in which infrared transmittance in a glass plate of the optical glass converted to a thickness of 1 mm becomes 10% is 12 ?m or more.
    Type: Grant
    Filed: May 15, 2018
    Date of Patent: May 21, 2019
    Assignee: AGC Inc.
    Inventors: Tatsuo Nagashima, Hiroyasu Miyazawa, Kenji Kitaoka
  • Patent number: 10177610
    Abstract: A stator includes a stator core, an insulating body, a coil, and a resin-molded product. The stator core includes a circumferentially side surface and an axially upper surface. The insulating body includes a side wall and an upper wall. The side wall covers the circumferentially side surface of the stator core. The upper wall covers the axially upper surface of the stator core. A radially inner side end surface of the upper wall is positioned farther toward a radially outer side than a radially inner side end surface of the side wall. The resin-molded product covers the coil.
    Type: Grant
    Filed: January 16, 2015
    Date of Patent: January 8, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kentaro Haruno, Tomohiko Miyamoto, Tatsuo Nagashima
  • Publication number: 20180257977
    Abstract: There is provided an optical glass having high infrared transmittance and being useful as an on-vehicle infrared sensor and the like. An optical glass including, in expression of atomic %: Ge+Ga; 6% to 30%; S+Se+Te; 50% to 85%; and Ti; 0.001% to 0.5%, wherein a wavelength (?T10%) at a long-wavelength side end in which infrared transmittance in a glass plate of the optical glass converted to a thickness of 1 mm becomes 10% is 12 ?m or more.
    Type: Application
    Filed: May 15, 2018
    Publication date: September 13, 2018
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Tatsuo NAGASHIMA, Hiroyasu MIYAZAWA, Kenji KITAOKA
  • Publication number: 20180251395
    Abstract: Provided is an optical glass suitable for an imaging lens or the like used for a vehicle-mounted camera exposed to harsh environment, having a high refractive index and high strength. The optical glass has a strengthened layer at a surface layer, and a depth of the strengthened layer is 1 ?m or more from a surface of the optical glass, and a refractive index (nd) of the optical glass is 1.73 to 2.10.
    Type: Application
    Filed: May 2, 2018
    Publication date: September 6, 2018
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Shusaku AKIBA, Tatsuo NAGASHIMA, Shigeki SAWAMURA
  • Publication number: 20180244559
    Abstract: Provided is an optical glass suitable for an imaging lens or the like used for a vehicle-mounted camera exposed to harsh environment, having a high refractive index and high strength, excellent crack resistance, and a sufficiently low glass transition point and devitrification temperature. In the optical glass, nd is 1.70 or more and 2.10 or less, Tg is 500° C. or more and 630° C. or less, the devitrification temperature is 1300° C. or less, a specific gravity is 4.0 g/cm3 or less, a crack initiation load (CIL) is 20 gf or more, and a fracture toughness value (Kc) is 0.60 MPa·m1/2 or more.
    Type: Application
    Filed: May 1, 2018
    Publication date: August 30, 2018
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Shusaku AKIBA, Tatsuo NAGASHIMA, Shigeki SAWAMURA
  • Publication number: 20180194671
    Abstract: Provided is an optical glass having a high refractive index, a low density, and good manufacturing properties. An optical glass having: a refractive index (nd) of 1.68 to 1.85; a density (d) of 4.0 g/cm3 or less; and a temperature where a viscosity of glass becomes log ?=2 of 950 to 1200° C., and an optical component using the optical glass are provided. This optical glass has the high refractive index, the low density, and the good manufacturing properties, and is suitable as the optical glass of wearable equipment, for a vehicle mounting, for a robot mounting, and so on.
    Type: Application
    Filed: March 1, 2018
    Publication date: July 12, 2018
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Shin-ichi AMMA, Tatsuo NAGASHIMA, Shusaku AKIBA
  • Publication number: 20180141851
    Abstract: Provided is an optical glass having a high refractive index, a low density, and good manufacturing properties. An optical glass having: a refractive index (nd) of 1.68 to 1.85; a density (d) of 4.0 g/cm3 or less; and a temperature where a viscosity of glass becomes log ?=2 of 950 to 1200° C., and an optical component using the optical glass are provided. This optical glass has the high refractive index, the low density, and the good manufacturing properties, and is suitable as the optical glass of wearable equipment, for a vehicle mounting, for a robot mounting, and so on.
    Type: Application
    Filed: January 3, 2018
    Publication date: May 24, 2018
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Shin-ichi Amma, Tatsuo Nagashima, Shusaku Akiba
  • Publication number: 20160336819
    Abstract: A stator includes a stator core, an insulating body, a coil, and a resin-molded product. The stator core includes a circumferentially side surface and an axially upper surface. The insulating body includes a side wall and an upper wall. The side wall covers the circumferentially side surface of the stator core. The upper wall covers the axially upper surface of the stator core. A radially inner side end surface of the upper wall is positioned farther toward a radially outer side than a radially inner side end surface of the side wall. The resin-molded product covers the coil.
    Type: Application
    Filed: January 16, 2015
    Publication date: November 17, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kentaro Haruno, Tomohiko Miyamoto, Tatsuo Nagashima
  • Publication number: 20160075592
    Abstract: There are provided a glass composition suitable for an optical conversion member containing phosphor particles low in heat resistance, an optical conversion member using the glass composition, and an illumination light source using the optical conversion member. A glass composition comprising, in mol % based on oxides, 5 to 35% of Bi2O3, 22 to 80% of B2O3, 10 to 48% of ZnO, and 0 to 4% of Al2O3, and not substantially containing SiO2, wherein a total amount of the Bi2O3 and the ZnO being 15% or more and less than 70%, an optical conversion member using the glass composition, an illumination light source using the optical conversion member, and a liquid crystal display device using the illumination light source are provided.
    Type: Application
    Filed: November 20, 2015
    Publication date: March 17, 2016
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Tatsuo NAGASHIMA, Masamichi TANIDA, Syuji MATSUMOTO, Tomoharu HASEGAWA
  • Patent number: 8691711
    Abstract: Glass for a display device, which comprises, as represented by mole percentage based on the following oxides, from 61 to 72% of SiO2, from 8 to 17% of Al2O3, from 6 to 18% of Li2O, from 2 to 15% of Na2O, from 0 to 8% of K2O, from 0 to 6% of MgO, from 0 to 6% of CaO, from 0 to 4% of TiO2, and from 0 to 2.5% of ZrO2, and having a total content R2O of Li2O, Na2O and K2O of from 15 to 25%, a ratio Li2O/R2O of the Li2O content to R2O of from 0.35 to 0.8, and a total content of MgO and CaO of from 0 to 9%.
    Type: Grant
    Filed: May 25, 2011
    Date of Patent: April 8, 2014
    Assignee: Asahi Glass Company, Limited
    Inventors: Tetsuya Nakashima, Seiki Ohara, Tatsuo Nagashima
  • Publication number: 20130324389
    Abstract: The present invention relates to a glass composition including, in terms of mol % on the basis of oxides: from 55 to 70% of SiO2, from 5 to 10% of Al2O3, from 0 to 0.5% of B2O3, from 3 to 15% of MgO, from 3 to 15% of CaO, from 2 to 10% of SrO, from 1 to 10% of BaO, from 0 to 3% of ZrO2, from 0 to 1.8% of Na2O, and from 0 to 1% of K2O, provided that MgO+CaO+SrO+BaO is from 20 to 35%, and Na2O+K2O is from 0 to 2%, in which the glass composition has a glass transition temperature of 680° C. or higher, an average thermal expansion coefficient of from 50×10?7 to 70×10?7/° C., and a temperature at which a viscosity is 102 dPa·s of 1,600° C. or lower.
    Type: Application
    Filed: August 6, 2013
    Publication date: December 5, 2013
    Applicant: Asahi Glass Company, Limited
    Inventors: Tatsuo NAGASHIMA, Yuki KONDO, Manabu NISHIZAWA, Akio KOIKE
  • Patent number: 8563149
    Abstract: To provide glass for a data storage medium substrate, whereby high heat resistance can be obtained. Glass for a data storage medium substrate, which comprises, as represented by mol percentage based on the following oxides, from 55 to 70% of SiO2, from 2.5 to 9% of Al2O3, from 0 to 10% of MgO, from 0 to 7% of CaO, from 0.5 to 10% of SrO, from 0 to 12.5% of BaO, from 0 to 2.5% of TiO2, from 0.5 to 3.7% of ZrO2, from 0 to 2.5% of Li2O, from 0 to 8% of Na2O, from 2 to 8% of K2O and from 0.5 to 5% of La2O3, provided that the total content of Al2O3 and ZrO2 (Al2O3+ZrO2) is at most 12%, and the total content of Li2O, Na2O and K2O (R2O) is at most 12%.
    Type: Grant
    Filed: March 3, 2010
    Date of Patent: October 22, 2013
    Assignee: Asahi Glass Company, Limited
    Inventors: Tatsuo Nagashima, Kensuke Nagai, Tetsuya Nakashima, Kei Maeda
  • Publication number: 20120199203
    Abstract: Provided are a glass sheet for a CIGS solar cell which satisfies both of high power generation efficiency and high glass transition temperature, and a CIGS solar cell having high power generation efficiency. A glass sheet for a Cu—In—Ga—Se solar cell containing, in terms of mol % on the basis of the following oxides, 60 to 75% of SiO2, 3 to 10% of Al2O3, 0 to 3% of B2O3, 5 to 18% of MgO, 0 to 5% of CaO, 4 to 18.5% of Na2O, 0 to 17% of K2O, and 0% or more and less than 10% of SrO+BaO+ZrO2, wherein K2O/(Na2O+K2O) is 0 to 0.5, and the glass sheet has a glass transition temperature (Tg) of more than 550° C.
    Type: Application
    Filed: April 18, 2012
    Publication date: August 9, 2012
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Manabu Nishizawa, Yuichi Kuroki, Tatsuo Nagashima, Yasushi Kawamoto, Shigeru Niki, Shogo Ishizuka
  • Patent number: 8168313
    Abstract: A glass for an information recording medium substrate, which comprises, as represented by mol % based on the following oxides, from 61 to 72% of SiO2, from 3 to 11% of Al2O3, from 0 to 14.3% of Li2O, from 0 to 22% of Na2O, from 0 to 22% of K2O, from 4 to 13% of MgO, from 0 to 6% of TiO2 and from 0 to 5% of ZrO2, provided that the total content of Li2O, Na2O and K2O (R2O) is from 10 to 22%, and (a) the ratio of the content of Li2O to R2O (Li2O/R2O) is at most 0.52, (b) the ratio of the content of Na2O to R2O (Na2O/R2O) is at least 0.35, or (c) the ratio of the content of K2O to R2O (K2O/R2O) is at least 0.45.
    Type: Grant
    Filed: March 16, 2010
    Date of Patent: May 1, 2012
    Assignee: Asahi Glass Company, Limited
    Inventors: Jun Endo, Tatsuo Nagashima, Tetsuya Nakashima, Manuel Diaz Reyes
  • Publication number: 20110312483
    Abstract: Glass for a display device, which comprises, as represented by mole percentage based on the following oxides, from 61 to 72% of SiO2, from 8 to 17% of Al2O3, from 6 to 18% of Li2O, from 2 to 15% of Na2O, from 0 to 8% of K2O, from 0 to 6% of MgO, from 0 to 6% of CaO, from 0 to 4% of TiO2, and from 0 to 2.5% of ZrO2, and having a total content R2O of Li2O, Na2O and K2 O of from 15 to 25%, a ratio Li2O/R2O of the Li2O content to R2O of from 0.35 to 0.8, and a total content of MgO and CaO of from 0 to 9%.
    Type: Application
    Filed: May 25, 2011
    Publication date: December 22, 2011
    Applicant: Asahi Glass Company, Limited
    Inventors: Tetsuya NAKASHIMA, Seiki OHARA, Tatsuo NAGASHIMA