Patents by Inventor Tatsunori Kawashima

Tatsunori Kawashima 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).

  • OPTICAL GLASS, OPTICAL ELEMENT INCLUDING OPTICAL GLASS, AND OPTICAL APPARATUS
    Publication number: 20220119302
    Abstract: Provided is optical glass containing, in terms of mol % of cations: 10 to 60% of a La3+ component; more than 0% and up to 75% of a Ga3+ component; and 5 to 75% of a Nb5+ component, in which a total amount of the La3+ component, Ga3+ component, and Nb5+ component is 60 to 100%.
    Type: Application
    Filed: December 28, 2021
    Publication date: April 21, 2022
    Applicants: The University of Tokyo, NIKON CORPORATION
    Inventors: Hiroyuki INOUE, Atsunobu MASUNO, Kohei YOSHIMOTO, Motoi UEDA, Hiroshi YAMAMOTO, Tatsunori KAWASHIMA
  • OPTICAL GLASS, OPTICAL ELEMENT COMPOSED OF OPTICAL GLASS, OPTICAL SYSTEM INTERCHANGEABLE LENS, AND OPTICAL DEVICE
    Publication number: 20220064051
    Abstract: An optical glass includes, in terms of mol % of cations, a total amount of La3+, Y3+, and Gd3+ components falling within a range of from 5% to 65% and a total amount of Zr4+, Hf4+, and Ta5+ components falling within a range of from 5% to 65%, and a relationship expressed in Expression (1) given below is satisfied.
    Type: Application
    Filed: November 10, 2021
    Publication date: March 3, 2022
    Applicant: NIKON CORPORATION
    Inventors: Kohei YOSHIMOTO, Motoi UEDA, Hiroshi YAMAMOTO, Tatsunori KAWASHIMA
  • Optical glass, optical element including optical glass, and optical apparatus
    Patent number: 11236009
    Abstract: Provided is optical glass containing, in terms of mol % of cations: 10 to 60% of a La3+ component; more than 0% and up to 75% of a Ga3+ component; and 5 to 75% of a Nb5+ component, in which a total amount of the La3+ component, Ga3+ component, and Nb5+ component is 60 to 100%.
    Type: Grant
    Filed: February 22, 2019
    Date of Patent: February 1, 2022
    Assignees: THE UNIVERSITY OF TOKYO, NIKON CORPORATION
    Inventors: Hiroyuki Inoue, Atsunobu Masuno, Kohei Yoshimoto, Motoi Ueda, Hiroshi Yamamoto, Tatsunori Kawashima
  • Optical glass, optical element composed of optical glass, optical system interchangeable lens, and optical device
    Patent number: 11203548
    Abstract: An optical glass includes, in terms of mol % of cations, a total amount of La3+, Y3+, and Gd3+ components falling within a range of from 5% to 65% and a total amount of Zr4+, Hf4+, and Ta5+ components failing within a range of from 5% to 65%, and a relationship expressed in Expression (1) given below is satisfied. (La3++Y3++Gd3+)×(Zr4+ Hf4++Ta3+)?400(%)2.
    Type: Grant
    Filed: March 19, 2020
    Date of Patent: December 21, 2021
    Assignee: NIKON CORPORATION
    Inventors: Kohei Yoshimoto, Motoi Ueda, Hiroshi Yamamoto, Tatsunori Kawashima
  • OPTICAL GLASS, OPTICAL ELEMENT COMPOSED OF OPTICAL GLASS, OPTICAL SYSTEM INTERCHANGEABLE LENS, AND OPTICAL DEVICE
    Publication number: 20200223739
    Abstract: An optical glass includes, in terms of mol % of cations, a total amount of La3+, Y3+, and Gd3+ components falling within a range of from 5% to 65% and a total amount of Zr4+, Hf4+, and Ta5+ components failing within a range of from 5% to 65%, and a relationship expressed in Expression (1) given below is satisfied.
    Type: Application
    Filed: March 19, 2020
    Publication date: July 16, 2020
    Applicant: NIKON CORPORATION
    Inventors: Kohei YOSHIMOTO, Motoi UEDA, Hiroshi YAMAMOTO, Tatsunori KAWASHIMA
  • OPTICAL GLASS, OPTICAL ELEMENT INCLUDING OPTICAL GLASS, AND OPTICAL APPARATUS
    Publication number: 20190185369
    Abstract: Provided is optical glass containing, in terms of mol % of cations: 10 to 60% of a La3+ component; more than 0% and up to 75% of a Ga3+ component; and 5 to 75% of a Nb5+ component, in which a total amount of the La3+ component, Ga3+ component, and Nb5+ component is 60 to 100%.
    Type: Application
    Filed: February 22, 2019
    Publication date: June 20, 2019
    Applicants: The University of Tokyo, NIKON CORPORATION
    Inventors: Hiroyuki INOUE, Atsunobu MASUNO, Kohei YOSHIMOTO, Motoi UEDA, Hiroshi YAMAMOTO, Tatsunori KAWASHIMA
  • Optical glass, optical element and optical device using optical glass
    Patent number: 10246368
    Abstract: To provide an optical glass which has a unique combination of anomalous dispersibility in a visible range with that in a near-infrared range. Provided is an optical glass containing respective components of SiO2 from 14 to 26% by mass, B2O3 from 9 to 16% by mass, and La2O3 from 10 to 42% by mass as essential components, and containing respective components of ZnO, Y2O3, ZrO2, Ta2O5, Li2O, and Na2O as optional components, and satisfying respective relationships of SiO2+B2O3 from 28 to 36% by mass, ZrO2+Ta2O5 from 6 to 16% by mass, La2O3+Y2O3+ZnO from 43 to 59% by mass, and Li2O+Na2O from 2 to 14% by mass.
    Type: Grant
    Filed: April 16, 2018
    Date of Patent: April 2, 2019
    Assignee: NIKON CORPORATION
    Inventors: Tatsunori Kawashima, Hiroshi Yamamoto, Kohei Yoshimoto
  • OPTICAL GLASS, OPTICAL ELEMENT AND OPTICAL DEVICE USING OPTICAL GLASS
    Publication number: 20180237333
    Abstract: To provide an optical glass which has a unique combination of anomalous dispersibility in a visible range with that in a near-infrared range. Provided is an optical glass containing respective components of SiO2 from 14 to 26% by mass, B2O3 from 9 to 16% by mass, and La2O3 from 10 to 42% by mass as essential components, and containing respective components of ZnO, Y2O3, ZrO2, Ta2O5, Li2O, and Na2O as optional components, and satisfying respective relationships of SiO2+B2O3 from 28 to 36% by mass, ZrO2+Ta2O5 from 6 to 16% by mass, La2O3+Y2O3+ZnO from 43 to 59% by mass, and Li2O+Na2O from 2 to 14% by mass.
    Type: Application
    Filed: April 16, 2018
    Publication date: August 23, 2018
    Applicant: NIKON CORPORATION
    Inventors: Tatsunori Kawashima, Hiroshi Yamamoto, Kohei Yoshimoto