Patents by Inventor Seiki Ohara

Seiki Ohara 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: 11505491
    Abstract: The present invention relates to a glass ceramic including crystals, and including, in mol % in terms of oxides: 65-75% of SiO2; 3-6% of Al2O3; 15-25% of Li2O; 0.2-4% of P2O5; 0.5-5% of ZrO2; and 0.01-0.5% of HfO2, in which the crystals include one or more kinds of crystals selected from the group consisting of ?-spodumene crystals, petalite crystals, and eucryptite crystals.
    Type: Grant
    Filed: November 9, 2021
    Date of Patent: November 22, 2022
    Assignee: AGC INC.
    Inventors: Seiki Ohara, Qing Li, Shusaku Akiba
  • Patent number: 11314018
    Abstract: The present invention relates to a polymer optical waveguide including: a core; an under-cladding; and an over-cladding, in which the polymer optical waveguide includes a coupling section and an optical waveguide section that are provided along a light propagation direction, the polymer optical waveguide includes portions having different core widths along the light propagation direction, and when a core width at a portion a having a narrowest core width is denoted Wa (?m) and a core height at the portion a is denoted Ha (?m), Ha is 1.3 ?m or more and 4.5 ?m or less, and Ha/Wa is 1.15 or less.
    Type: Grant
    Filed: September 21, 2020
    Date of Patent: April 26, 2022
    Assignee: AGC Inc.
    Inventors: Seiki Ohara, Shotaro Takenobu, Naoya Wada
  • Publication number: 20220073425
    Abstract: The present invention relates to a chemically strengthened glass with a film, including: a chemically strengthened glass having a pair of main surfaces opposing each other; and a film formed on at least one of the main surfaces of the chemically strengthened glass, in which the chemically strengthened glass has two or less interference fringes observed under stress measurement utilizing surface propagation light having a wavelength of 365 nm, and the film has a refractive index lower than a refractive index of the chemically strengthened glass.
    Type: Application
    Filed: September 8, 2021
    Publication date: March 10, 2022
    Applicant: AGC Inc.
    Inventors: Seiki OHARA, Shunji WACHI, Hironobu SATO
  • Publication number: 20220073415
    Abstract: The present invention relates to a glass ceramic including crystals, and including, in mol % in terms of oxides: 65-75% of SiO2; 3-6% of Al2O3; 15-25% of Li2O; 0.2-4% of P2O5; 0.5-5% of ZrO2; and 0.01-0.5% of HfO2, in which the crystals include one or more kinds of crystals selected from the group consisting of ?-spodumene crystals, petalite crystals, and eucryptite crystals.
    Type: Application
    Filed: November 9, 2021
    Publication date: March 10, 2022
    Applicant: AGC Inc.
    Inventors: Seiki OHARA, Qing LI, Shusaku AKIBA
  • Publication number: 20220057574
    Abstract: The present invention provides a polymer optical waveguide having a core, an under cladding and an over cladding, in which: the polymer optical waveguide has a first section on one end side in the light propagation direction where no portion of the over cladding exists and the core and the under cladding are exposed, and a second section on the other end side in the light propagation direction where the core is covered with the under cladding and the over cladding; and a relative refractive index difference among the core, the under cladding and the over cladding, a core width and core height in an end surface at the one end side of the first section, and a core width and core height in an end surface at the other end side of the second section satisfy predetermined relationships.
    Type: Application
    Filed: November 8, 2021
    Publication date: February 24, 2022
    Applicant: AGC Inc.
    Inventors: Naoya WADA, Shotaro TAKENOBU, Kenta KOBAYASHI, Seiki OHARA
  • Patent number: 11099325
    Abstract: The present invention provides a polymer optical waveguide containing: a core; and a cladding having a refractive index lower than that of the core, provided around the core, in which the polymer optical waveguide has a core-coupling section where at least a part of the cladding is not present along a light propagation direction of the polymer optical waveguide and an application type removal film A provided so as to come into contact with the core of the core-coupling section.
    Type: Grant
    Filed: February 11, 2020
    Date of Patent: August 24, 2021
    Assignee: AGC Inc.
    Inventors: Shotaro Takenobu, Toshihisa Okada, Satoko Noma, Kenta Kobayashi, Keisuke Hanashima, Seiki Ohara
  • Publication number: 20210053867
    Abstract: A glass for chemical strengthening contains, in mole percentage on an oxide basis, 58 to 80% of SiO2, 13 to 18% of Al2O3, 0 to 5% of B2O3, 0.5 to 4% of P2O5, 4 to 10% of Li2O, 5 to 14% of Na2, 0 to 2% of K2O, 0 to 11% of MgO, 0 to 5% of CaO, 0 to 20% of SrO, 0 to 15% of BaO, 0 to 10% of ZnO, 0 to 1% of TiO2, and 0 to 2% of ZrO2. A value of X is 30000 or more. The value of X is calculated based on the formula, X=SiO2×329+Al2O3×786+B2O3×627+P2O5×(?941)+Li2O×927+Na2O×47.5+K2O×(?371)+MgO×1230+CaO×1154+SrO×733+ZrO2×51.8, by using the contents in mole percentage on an oxide basis of components.
    Type: Application
    Filed: September 17, 2020
    Publication date: February 25, 2021
    Applicant: AGC Inc.
    Inventors: Suguru MURAYAMA, Seiki OHARA, Qing LI, Shusaku AKIBA
  • Publication number: 20210003780
    Abstract: The present invention relates to a polymer optical waveguide including: a core; an under-cladding; and an over-cladding, in which the polymer optical waveguide includes a coupling section and an optical waveguide section that are provided along a light propagation direction, the polymer optical waveguide includes portions having different core widths along the light propagation direction, and when a core width at a portion a having a narrowest core width is denoted Wa (?m) and a core height at the portion a is denoted Ha (?m), Ha is 1.3 ?m or more and 4.5 ?m or less, and Ha/Wa is 1.15 or less.
    Type: Application
    Filed: September 21, 2020
    Publication date: January 7, 2021
    Applicant: AGC Inc.
    Inventors: Seiki OHARA, Shotaro TAKENOBU, Naoya WADA
  • Patent number: 10768372
    Abstract: The present invention relates to a resin optical waveguide including a core and a cladding having a refractive index lower than that of the core, in which the resin optical waveguide includes, along a light propagation direction, a coupling part at which at least a part of the core is exposed and an optical waveguide part where the whole circumference of the core is covered with the cladding, and the core has a width Wb at an end part of the coupling part at a side of the optical waveguide part being larger than a width Wa of the core at an end part of the coupling part at a side opposite to the optical waveguide part.
    Type: Grant
    Filed: March 5, 2019
    Date of Patent: September 8, 2020
    Assignee: AGC Inc.
    Inventors: Seiki Ohara, Shotaro Takenobu
  • Publication number: 20200183081
    Abstract: The present invention provides a polymer optical waveguide containing: a core; and a cladding having a refractive index lower than that of the core, provided around the core, in which the polymer optical waveguide has a core-coupling section where at least a part of the cladding is not present along a light propagation direction of the polymer optical waveguide and an application type removal film A provided so as to come into contact with the core of the core-coupling section.
    Type: Application
    Filed: February 11, 2020
    Publication date: June 11, 2020
    Applicant: AGC Inc.
    Inventors: Shotaro TAKENOBU, Toshihisa OKADA, Satoko NOMA, Kenta KOBAYASHI, Keisuke HANASHIMA, Seiki OHARA
  • Patent number: 10473855
    Abstract: Provided is a resin optical waveguide containing a core, under cladding and over cladding, in which the resin optical waveguide has portions having a core width varying along a light propagation direction, the maximum core width is 4 to 10 ?m, and the minimum core width of 1 ?m or more and less than 4 ?m, when the length of a portion S at which the core width is 1 ?m or more and less than 4 ?m is LS and the length of a portion at which the core width is 4 to 10 ?m is LL, the proportion of LS to the total length is 0.1 to 40%, and the portion S contains neither a certain bubble defect nor a certain defect inside the core and in a vicinity of a core-cladding interface.
    Type: Grant
    Filed: November 29, 2018
    Date of Patent: November 12, 2019
    Assignee: AGC INC.
    Inventors: Seiki Ohara, Kenta Kobayashi, Shotaro Takenobu
  • Patent number: 10472272
    Abstract: A glass for chemical strengthening contains, in mole percentage on an oxide basis, 58 to 80% of SiO2, 13 to 18% of Al2O3, 0 to 5% of B2O3, 0.5 to 4% of P2O5, 4 to 10% of Li2O, 5 to 14% of Na2O, 0 to 2% of K2O, 0 to 11% of MgO, 0 to 5% of CaO, 0 to 20% of SrO, 0 to 15% of BaO, 0 to 10% of ZnO, 0 to 1% of TiO2, and 0 to 2% of ZrO2. A value of X is 30000 or more. The value of X is calculated based on the formula, X=SiO2×329+Al2O3×786+B2O3×627+P2O5×(?941)+Li2O×927+Na2O×47.5+K2O×(?371)+MgO×1230+CaO×1154+SrO×733+ZrO2×51.8, by using the contents in mole percentage on an oxide basis of components.
    Type: Grant
    Filed: July 12, 2018
    Date of Patent: November 12, 2019
    Assignee: AGC Inc.
    Inventors: Suguru Murayama, Seiki Ohara, Qing Li, Shusaku Akiba
  • Patent number: 10409000
    Abstract: A resin optical waveguide containing a core, an under cladding and an over cladding having refractive indices lower than that of the core, in which the resin optical waveguide has, at one end side of, a core-exposed section at which the over cladding is not present and the core and the under cladding nearby the core are exposed and, of the under cladding, a portion corresponding to the core-exposed section has a first layer and a second layer that satisfy a certain condition.
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: September 10, 2019
    Assignee: AGC Inc.
    Inventors: Seiki Ohara, Shotaro Takenobu
  • Patent number: 10393966
    Abstract: The present invention relates to a composite optical waveguide (1) containing a polymer optical waveguide and a silicon optical waveguide adiabatically coupled to each other, in which the polymer optical waveguide and the silicon optical waveguide are coupled to each other by an adhesive layer in an adiabatic-coupling portion where a core of the polymer optical waveguide and a core of the silicon optical waveguide are disposed to face each other, the adhesive layer is formed by using a photocurable adhesive having a glass transition point Tg being 125° C. or higher after curing, and the adiabatic-coupling portion includes a region in which a spacing t between the core of the polymer optical waveguide and the silicon optical waveguide is 1.5 ?m or less.
    Type: Grant
    Filed: September 14, 2018
    Date of Patent: August 27, 2019
    Assignee: AGC Inc.
    Inventors: Toshihisa Okada, Seiki Ohara, Shotaro Takenobu, Satoko Noma
  • Patent number: 10384974
    Abstract: A glass for chemical strengthening contains, in mole percentage on an oxide basis, 58 to 80% of SiO2, 13 to 18% of Al2O3, 0 to 5% of B2O3, 0.5 to 4% of P2O5, 4 to 10% of Li2O, 5 to 14% of Na2O, 0 to 2% of K2O, 0 to 11% of MgO, 0 to 5% of CaO, 0 to 20% of SrO, 0 to 15% of BaO, 0 to 10% of ZnO, 0 to 1% of TiO2, and 0 to 2% of ZrO2. A value of X is 30000 or more. The value of X is calculated based on the formula, X=SiO2×329+Al2O3×786+B2O3×627+P2O5×(?941)+Li2O×927+Na2O×47.5+K2O×(?371)+MgO×1230+CaO×1154+SrO×733+ZrO2×51.8, by using the contents in mole percentage on an oxide basis of components.
    Type: Grant
    Filed: February 28, 2018
    Date of Patent: August 20, 2019
    Assignee: AGC Inc.
    Inventors: Suguru Murayama, Seiki Ohara, Qing Li, Shusaku Akiba
  • Patent number: 10370287
    Abstract: A glass for chemical strengthening contains, in mole percentage on an oxide basis, 58 to 72% of SiO2, 7 to 18% of Al2O3, 1% or more of B2O3, 0 to 4% of P2O5, 5 to 16% of Li2O, 0 to 7% of Na2O, 0 to 2% of K2O, 0 to 6% of MgO, 0 to 20% of CaO, 0 to 20% of SrO, 0 to 15% of BaO, 0 to 10% of ZnO, 0 to 1% of TiO2, and 0 to 2% of ZrO2. A value of X is 30000 or more. The value of X is calculated based on the formula, X=SiO2×329+Al2O3×786+B2O3×627+P2O5×(?941)+Li2O×927+Na2O×47.5+K2O×(?371)+MgO×1230+CaO×1154+SrO×733+ZrO2×51.8, by using the contents in mole percentage on an oxide basis of components.
    Type: Grant
    Filed: March 13, 2018
    Date of Patent: August 6, 2019
    Assignee: AGC Inc.
    Inventors: Suguru Murayama, Seiki Ohara, Qing Li, Shusaku Akiba
  • Publication number: 20190204503
    Abstract: The present invention relates to a resin optical waveguide including a core and a cladding having a refractive index lower than that of the core, in which the resin optical waveguide includes, along a light propagation direction, a coupling part at which at least a part of the core is exposed and an optical waveguide part where the whole circumference of the core is covered with the cladding, and the core has a width Wb at an end part of the coupling part at a side of the optical waveguide part being larger than a width Wa of the core at an end part of the coupling part at a side opposite to the optical waveguide part.
    Type: Application
    Filed: March 5, 2019
    Publication date: July 4, 2019
    Applicant: AGC Inc.
    Inventors: Seiki OHARA, Shotaro TAKENOBU
  • Publication number: 20190194057
    Abstract: A glass for chemical strengthening contains, in mole percentage on an oxide basis, 58 to 80% of SiO2, 13 to 18% of Al2O3, 0 to 5% of B2O3, 0.5 to 4% of P2O5, 4 to 10% of Li2O, 5 to 14% of Na2O, 0 to 2% of K2O, 0 to 11% of MgO, 0 to 5% of CaO, 0 to 20% of SrO, 0 to 15% of BaO, 0 to 10% of ZnO, 0 to 1% of TiO2, and 0 to 2% of ZrO2. A value of X is 30000 or more. The value of X is calculated based on the formula, X=SiO2×329+Al2O3×786+B2O3×627+P2O5×(?941)+Li2O×927+Na2O×47.5+K2O×(?371)+MgO×1230+CaO×1154+SrO×733+ZrO2×51.8, by using the contents in mole percentage on an oxide basis of components.
    Type: Application
    Filed: March 4, 2019
    Publication date: June 27, 2019
    Applicant: AGC Inc.
    Inventors: Suguru Murayama, Seiki Ohara, Qing Li, Shusaku Akiba
  • Publication number: 20190107674
    Abstract: Provided is a resin optical waveguide containing a core, under cladding and over cladding, in which the resin optical waveguide has portions having a core width varying along a light propagation direction, the maximum core width is 4 to 10 ?m, and the minimum core width of 1 ?m or more and less than 4 ?m, when the length of a portion S at which the core width is 1 ?m or more and less than 4?m is LS and the length of a portion at which the core width is 4 to 10 ?m is LL, the proportion of LS to the total length is 0.1 to 40%, and the portion S contains neither a certain bubble defect nor a certain defect inside the core and in a vicinity of a core-cladding interface.
    Type: Application
    Filed: November 29, 2018
    Publication date: April 11, 2019
    Applicant: AGC INC.
    Inventors: Seiki OHARA, Kenta KOBAYASHI, Shotaro TAKENOBU
  • Patent number: 10222554
    Abstract: A resin optical waveguide containing a core, an under cladding and an over cladding having refractive indices lower than that of the core, in which the resin optical waveguide has, at one end side thereof, a core-exposed section at which the over cladding is not present and the core is exposed and, of the under cladding, a portion corresponding to the core-exposed section has a core-neighboring region that satisfies the following (1) and (2): (1) the core-neighboring region is a region whose distance from the core is within x, and x is 5 ?m or more and 20 ?m or less; and (2) the core-neighboring region has a refractive index distribution that the refractive index at a side of an interface with the core is high and the refractive index at a far side from the interface with the core is low.
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: March 5, 2019
    Assignee: AGC Inc.
    Inventors: Seiki Ohara, Shotaro Takenobu