Patents by Inventor Keiji Tsunetomo

Keiji Tsunetomo 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: 11276584
    Abstract: A method for producing a glass substrate according to the present invention includes the steps of: (I) forming a through hole (11) in a glass sheet (10); (II) forming a resin layer (20) on a first principal surface of the glass sheet (10) using a resin composition sensitive to light having a predetermined wavelength ?1; (III) photoexposing an area of the resin layer (20) that covers the through hole (11) by irradiating the area with light U having the wavelength ?1 and applied from the direction of a second principal surface of the glass sheet (10); and (IV) forming a through-resin hole (21) by removing the area photoexposed in the step (III). The glass sheet (10) protects the resin layer (20) from the light U so as to prevent the resin layer (20) from being photoexposed by beams of the light U that are incident on the second principal surface of the glass sheet (10) in the step (III).
    Type: Grant
    Filed: August 6, 2019
    Date of Patent: March 15, 2022
    Assignee: NIPPON SHEET GLASS COMPANY, LIMITED
    Inventors: Keiji Tsunetomo, Hideki Hashizume, Kazuya Ohkawa
  • Publication number: 20220034477
    Abstract: A radiation angle changing element bonded to a housing includes: a glass substrate; and a resin layer provided on the glass substrate and having an optically functioning part. In a bonding portion bonded to the housing, the resin layer is not formed on the glass substrate.
    Type: Application
    Filed: October 19, 2021
    Publication date: February 3, 2022
    Applicant: Nippon Sheet Glass Company, Limited
    Inventors: Keiji TSUNETOMO, Satoru KUSAKA
  • Patent number: 10917536
    Abstract: An image sensor unit includes: a linear light source that illuminates a document with a light; a first erecting equal-magnification lens array and a second erecting equal-magnification lens array arranged in the stated order away from the document so as to receive a light reflected from the document and form an erecting equal-magnification image; a slit provided on an intermediate imaging plane between the first erecting equal-magnification lens array and the second erecting equal-magnification lens array; a diffraction grating that disperses a light output from the second erecting equal-magnification lens array; and a linear image sensor that receives a light dispersed by the diffraction grating.
    Type: Grant
    Filed: September 19, 2019
    Date of Patent: February 9, 2021
    Assignee: Nippon Sheet Glass Company, Limited
    Inventors: Keiji Tsunetomo, Satoru Kusaka
  • Publication number: 20200303188
    Abstract: A method for producing a glass substrate with through glass vias according to the present invention includes: irradiating a glass substrate (10) with a laser beam to form a modified portion; forming a first conductive portion (20a) on a first principal surface of the glass substrate (10), the first conductive portion (20a) being positioned in correspondence with the modified portion (12); and forming a through hole (14) in the glass substrate (10) after formation of the first conductive portion by etching at least the modified portion (12) using an etchant. This method allows easy handling of a glass substrate during formation of a conductive portion such as a circuit on the glass substrate, and is also capable of forming a through hole in the glass substrate relatively quickly while preventing damage to the conductive portion such as a circuit formed on the glass substrate.
    Type: Application
    Filed: June 10, 2020
    Publication date: September 24, 2020
    Inventors: Keiji Tsunetomo, Hideki Hashizume, Kazuya Ohkawa
  • Patent number: 10727048
    Abstract: A method for producing a glass substrate with through glass vias according to the present invention includes: irradiating a glass substrate (10) with a laser beam to form a modified portion; forming a first conductive portion (20a) on a first principal surface of the glass substrate (10), the first conductive portion (20a) being positioned in correspondence with the modified portion (12); and forming a through hole (14) in the glass substrate (10) after formation of the first conductive portion by etching at least the modified portion (12) using an etchant. This method allows easy handling of a glass substrate during formation of a conductive portion such as a circuit on the glass substrate, and is also capable of forming a through hole in the glass substrate relatively quickly while preventing damage to the conductive portion such as a circuit formed on the glass substrate.
    Type: Grant
    Filed: January 15, 2019
    Date of Patent: July 28, 2020
    Assignee: NIPPON SHEET GLASS COMPANY, LIMITED
    Inventors: Keiji Tsunetomo, Hideki Hashizume, Kazuya Ohkawa
  • Publication number: 20200064568
    Abstract: An optical receiver is an optical receiver that receives, through a light receiving element, a light beam having a spiral wavefront propagated through a multimode fiber. The optical receiver includes a reception side vortex optical element arranged between the multimode fiber and the light receiving element.
    Type: Application
    Filed: October 25, 2019
    Publication date: February 27, 2020
    Applicant: Nippon Sheet Glass Company, Limited
    Inventors: Keiji TSUNETOMO, Satoru KUSAKA
  • Publication number: 20200014813
    Abstract: An image sensor unit includes: a linear light source that illuminates a document with a light; a first erecting equal-magnification lens array and a second erecting equal-magnification lens array arranged in the stated order away from the document so as to receive a light reflected from the document and form an erecting equal-magnification image; a slit provided on an intermediate imaging plane between the first erecting equal-magnification lens array and the second erecting equal-magnification lens array; a diffraction grating that disperses a light output from the second erecting equal-magnification lens array; and a linear image sensor that receives a light dispersed by the diffraction grating.
    Type: Application
    Filed: September 19, 2019
    Publication date: January 9, 2020
    Applicant: Nippon Sheet Glass Company, Limited
    Inventors: Keiji TSUNETOMO, Satoru Kusaka
  • Publication number: 20190362987
    Abstract: A method for producing a glass substrate according to the present invention includes the steps of: (I) forming a through hole (11) in a glass sheet (10); (II) forming a resin layer (20) on a first principal surface of the glass sheet (10) using a resin composition sensitive to light having a predetermined wavelength ?1; (III) photoexposing an area of the resin layer (20) that covers the through hole (11) by irradiating the area with light U having the wavelength ?1 and applied from the direction of a second principal surface of the glass sheet (10); and (IV) forming a through-resin hole (21) by removing the area photoexposed in the step (III). The glass sheet (10) protects the resin layer (20) from the light U so as to prevent the resin layer (20) from being photoexposed by beams of the light U that are incident on the second principal surface of the glass sheet (10) in the step (III).
    Type: Application
    Filed: August 6, 2019
    Publication date: November 28, 2019
    Inventors: Keiji TSUNETOMO, Hideki HASHIZUME, Kazuya OHKAWA
  • Publication number: 20190339423
    Abstract: An optical component includes: a first layer made of a first material having a first refractive index, the first layer including a first principal surface and a second principal surface opposite to the first principal surface; and a second layer made of a second material having a second refractive index different from the first refractive index, the second layer including a third principal surface and a fourth principal surface opposite to the third principal surface, and the first layer and the second layer are stacked such that the second principal surface and the third principal surface are in contact. A lens is formed on the first principal surface of the first layer, and a vortex profile is formed on the third principal surface of the second layer.
    Type: Application
    Filed: July 17, 2019
    Publication date: November 7, 2019
    Applicant: Nippon Sheet Glass Company, Limited
    Inventors: Keiji Tsunetomo, Shiro Sato, Satoru Kusaka
  • Patent number: 10418256
    Abstract: A method for producing a glass substrate according to the present invention includes the steps of: (I) forming a through hole (11) in a glass sheet (10); (II) forming a resin layer (20) on a first principal surface of the glass sheet (10) using a resin composition sensitive to light having a predetermined wavelength ?1; (III) photoexposing an area of the resin layer (20) that covers the through hole (11) by irradiating the area with light U having the wavelength ?1 and applied from the direction of a second principal surface of the glass sheet (10); and (IV) forming a through-resin hole (21) by removing the area photoexposed in the step (III). The glass sheet (10) protects the resin layer (20) from the light U so as to prevent the resin layer (20) from being photoexposed by beams of the light U that are incident on the second principal surface of the glass sheet (10) in the step (III).
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: September 17, 2019
    Assignee: NIPPON SHEET GLASS COMPANY, LIMITED
    Inventors: Keiji Tsunetomo, Hideki Hashizume, Kazuya Ohkawa
  • Publication number: 20190248698
    Abstract: The present invention provides a low-alkali or alkali-free glass for laser processing, the glass reducing occurrence of laser irradiation-induced cracks and allowing formation of circular through holes. The present invention relates to the glass for laser processing, the glass having a glass composition including, in mol %: 45.0%?SiO2?70.0%; 2.0%?B2O3?20.0%; 3.0%?Al2O3?20.0%; 0%?ZnO?9.0%; and (I) 0.1%?CuO?2.0% and 0%?TiO2?15.0%; or (II) 0.1%?TiO2<5.0% and 0%?CuO<0.1%, wherein, in the case of (II), a metal oxide serving as a coloring component is further included, a relationship of 0?Li2O+Na2O+K2O<2.0% is satisfied, either of principal surfaces of the glass has a layer containing fine particles, and the fine particles have an average particle diameter of 10 nm or more and less than 1.0 ?m.
    Type: Application
    Filed: June 15, 2017
    Publication date: August 15, 2019
    Inventors: Keiji TSUNETOMO, Haruhiko MAMADA, Teruhide INOUE
  • Publication number: 20190148142
    Abstract: A method for producing a glass substrate with through glass vias according to the present invention includes: irradiating a glass substrate (10) with a laser beam to form a modified portion; forming a first conductive portion (20a) on a first principal surface of the glass substrate (10), the first conductive portion (20a) being positioned in correspondence with the modified portion (12); and forming a through hole (14) in the glass substrate (10) after formation of the first conductive portion by etching at least the modified portion (12) using an etchant. This method allows easy handling of a glass substrate during formation of a conductive portion such as a circuit on the glass substrate, and is also capable of forming a through hole in the glass substrate relatively quickly while preventing damage to the conductive portion such as a circuit formed on the glass substrate.
    Type: Application
    Filed: January 15, 2019
    Publication date: May 16, 2019
    Inventors: Keiji TSUNETOMO, Hideki HASHIZUME, Kazuya OHKAWA
  • Patent number: 10276368
    Abstract: A method for producing a glass substrate with through glass vias according to the present invention includes: irradiating a glass substrate (10) with a laser beam to form a modified portion; forming a first conductive portion (20a) on a first principal surface of the glass substrate (10), the first conductive portion (20a) being positioned in correspondence with the modified portion (12); and forming a through hole (14) in the glass substrate (10) after formation of the first conductive portion by etching at least the modified portion (12) using an etchant. This method allows easy handling of a glass substrate during formation of a conductive portion such as a circuit on the glass substrate, and is also capable of forming a through hole in the glass substrate relatively quickly while preventing damage to the conductive portion such as a circuit formed on the glass substrate.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: April 30, 2019
    Assignee: NIPPON SHEET GLASS COMPANY, LIMITED
    Inventors: Keiji Tsunetomo, Hideki Hashizume, Kazuya Ohkawa
  • Publication number: 20170358447
    Abstract: A method for producing a glass substrate with through glass vias according to the present invention includes: irradiating a glass substrate (10) with a laser beam to form a modified portion; forming a first conductive portion (20a) on a first principal surface of the glass substrate (10), the first conductive portion (20a) being positioned in correspondence with the modified portion (12); and forming a through hole (14) in the glass substrate (10) after formation of the first conductive portion by etching at least the modified portion (12) using an etchant. This method allows easy handling of a glass substrate during formation of a conductive portion such as a circuit on the glass substrate, and is also capable of forming a through hole in the glass substrate relatively quickly while preventing damage to the conductive portion such as a circuit formed on the glass substrate.
    Type: Application
    Filed: September 29, 2015
    Publication date: December 14, 2017
    Inventors: Keiji TSUNETOMO, Hideki HASHIZUME, Kazuya OHKAWA
  • Publication number: 20170229318
    Abstract: A method for producing a glass substrate according to the present invention includes the steps of: (I) forming a through hole (11) in a glass sheet (10); (II) forming a resin layer (20) on a first principal surface of the glass sheet (10) using a resin composition sensitive to light having a predetermined wavelength ?1; (III) photoexposing an area of the resin layer (20) that covers the through hole (11) by irradiating the area with light U having the wavelength ?1 and applied from the direction of a second principal surface of the glass sheet (10); and (IV) forming a through-resin hole (21) by removing the area photoexposed in the step (III). The glass sheet (10) protects the resin layer (20) from the light U so as to prevent the resin layer (20) from being photoexposed by beams of the light U that are incident on the second principal surface of the glass sheet (10) in the step (III).
    Type: Application
    Filed: September 29, 2015
    Publication date: August 10, 2017
    Inventors: Keiji TSUNETOMO, Hideki HASHIZUME, Kazuya OHKAWA
  • Patent number: 8307672
    Abstract: A glass substrate processing method includes irradiating laser light L onto a glass substrate 1 such that the laser light L is focused within the glass substrate 1, thereby forming a high density area 3 that has a higher density than areas where the laser light L is not irradiated around the portion where the laser light L is focused; and performing chemical etching on the glass substrate 1 using an etching solution such that at least a portion of the high density area is allowed to remain, thereby forming a projection 2 on a surface 1a of the glass substrate 1.
    Type: Grant
    Filed: November 22, 2006
    Date of Patent: November 13, 2012
    Assignee: Olympus Corporation
    Inventors: Takeshi Hidaka, Yasushi Nakamura, Tomonori Imamura, Shinya Okamoto, Hirotaka Koyo, Yasuhiro Saito, Keiji Tsunetomo
  • Publication number: 20100216625
    Abstract: A glass for laser processing that is processed through laser beam irradiation, wherein the glass for laser processing has a composition that satisfies the following relationships: 40?M[NFO]?70; 5?(M[TiO2])?45; and 5?M[NMO]?40, where M[NFO], M[TiO2], and M[NMO] denote the content by percentage of network forming oxides (mol %), that of TiO2 (mol %), and that of network modifying oxides (mol %), respectively. With this structure, a glass for laser processing is obtained in which not only the vicinity of the surface thereof but also the inner portion thereof can be laser-processed.
    Type: Application
    Filed: May 6, 2010
    Publication date: August 26, 2010
    Applicant: NIPPON SHEET GLASS COMPANY, LIMITED
    Inventors: Masanori SHOJIYA, Hirotaka KOYO, Keiji TSUNETOMO
  • Patent number: 7724997
    Abstract: A waveguide element 21 including a photonic crystal waveguide including a core 4 that is constituted by a photonic crystal having a refractive index periodicity at least in one direction, and that propagates an electromagnetic wave in a direction in which the photonic crystal does not have the refractive index periodicity. At least one of materials forming the core 4 constituted by the photonic crystal, and at least a portion of a cladding in contact with a side face of the core 4 are constituted by a fluid 6. Thus, it is possible to provide a waveguide element that can be used as a light control element, can be produced easily and also can be applied to an optical sensor.
    Type: Grant
    Filed: January 12, 2006
    Date of Patent: May 25, 2010
    Assignee: Nippon Sheet Glass Company, Limited
    Inventors: Shigeo Kittaka, Masatoshi Nara, Keiji Tsunetomo
  • Patent number: 7688512
    Abstract: A transmissive diffraction grating includes a substrate and a plurality of ridges provided in a mutually parallel manner at constant periodicity p on the substrate. The ridges include a first layer, a second layer (refractive index n2: 2.0-2.5), and a third layer with non-continuous refractive indices, arranged in that order from the substrate outward. The first layer adjacent the substrate, in terms of its refractive index, exhibits a difference of 0.1 or less relative to the substrate. The second layer has a higher refractive index than the first layer and third layer and satisfies the following conditions. For a single ridge, the cross-sectional area S of a cross-section of the second layer perpendicular to the longitudinal direction of said ridge is in the range of 0.75p2k1?2/(n2?1)<S<1.20p2k1?2/(n2?1), were, ? is the angle of incidence onto the diffraction grating face, expressed in radian units, and the constant k1 is 1.1. The thickness d2 of the second layer is in the range of 0.
    Type: Grant
    Filed: September 19, 2007
    Date of Patent: March 30, 2010
    Assignee: Nippon Sheet Glass Company, Limited
    Inventors: Shigeo Kittaka, Kentaro Yamada, Tatsuhiro Nakazawa, Keiji Tsunetomo
  • Patent number: 7666492
    Abstract: A surface of a substrate is coated with a sol solution containing metal alkoxide. A gelled material of the sol solution is pressed against a molding tool while the gelled material is kept soft. Thus, the gelled material is molded. Then, the gelled material is hardened. As a result, protrusions of the hardened gel layer 14 are formed on the substrate so that an irregular texture substrate is formed. A multilayer thin film constituted by a plurality of layers of at least two kinds of materials with different refractive indexes is laminated on a surface of the irregular texture substrate.
    Type: Grant
    Filed: November 26, 2004
    Date of Patent: February 23, 2010
    Assignee: Nippon Sheet Glass Company, Limited
    Inventors: Katsuhide Shimmo, Yasuji Sasaki, Masahiro Oikawa, Keiji Tsunetomo