Patents by Inventor Yohei Kasai

Yohei Kasai 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: 12001158
    Abstract: A fixing member having an endless belt shape or a roller shape includes a base layer and a surface layer. The surface layer contains a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, and has a pore communicating with an opening of an outer surface thereof. Perfluoropolyether is contained in at least a part of the pores. A ratio (E?(1)/E?(2)) is 0.60 to 1.00, where E?(1) is an average value of loss elastic moduli E? of the surface layer in a direction orthogonal to a circumferential direction of the fixing member measured at a frequency of 10 Hz at 100 to 150° C., and E?(2) is an average value of loss elastic moduli E? of the surface layer in a direction orthogonal to the circumferential direction of the fixing member measured at a frequency of 10 Hz at 100 to 150° C. after removal of the perfluoropolyether contained in the pore.
    Type: Grant
    Filed: October 3, 2022
    Date of Patent: June 4, 2024
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Naoko Kasai, Yohei Miyauchi, Masatsugu Toyonori, Yasuharu Notoya, Hiroki Muramatsu, Tomoyo Miyakai, Yoshiharu Seki
  • Patent number: 11988983
    Abstract: A fixing member having a base layer and a surface layer, wherein the surface layer includes a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, and having at least one pore communicating with an opening on an outer surface thereof. A composition containing perfluoropolyether and a fluoropolymer is contained in at least a part of the at least one pore. The fluoropolymer has a particular repeating unit composed of perfluoropolyether, and at least one structure selected from the group consisting of a T unit of siloxane and a Q unit of siloxane.
    Type: Grant
    Filed: October 3, 2022
    Date of Patent: May 21, 2024
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yohei Miyauchi, Masatsugu Toyonori, Naoko Kasai, Yasuharu Notoya, Hiroki Muramatsu, Tomoyo Miyakai
  • Publication number: 20240160137
    Abstract: A fixing member having a base layer and a surface layer, wherein the surface layer includes a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, and having at least one pore communicating with an opening on an outer surface thereof. A composition containing perfluoropolyether and a fluoropolymer is contained in at least a part of the at least one pore. The fluoropolymer has a particular repeating unit composed of perfluoropolyether, and at least one structure selected from the group consisting of a T unit of siloxane and a Q unit of siloxane.
    Type: Application
    Filed: December 18, 2023
    Publication date: May 16, 2024
    Inventors: Yohei Miyauchi, Masatsugu Toyonori, Naoko Kasai, Yasuharu Notoya, Hiroki Muramatsu, Tomoyo Miyakai
  • Publication number: 20240127387
    Abstract: An information processing apparatus comprises a controller, the controller being configured to execute: acquiring pieces of result data showing movement results of a plurality of users; calculating at least either first evaluation values about convenience in a case of moving in predetermined sections in private vehicles or second evaluation values about convenience in a case of moving in the predetermined sections in public transportation at least based on the pieces of result data; and calculating, for a predetermined area, a score indicating a deviation between convenience in the case of moving in the private vehicles and convenience in the case of moving in the public transportation based on the first and second evaluation values.
    Type: Application
    Filed: October 18, 2023
    Publication date: April 18, 2024
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Katsunori TAKAHASHI, Akie SAKIYAMA, Nobuto MATSUDAIRA, Haruna FUKUSHIMA, Yohei MIMURA, Takuya MURAKAMI, Yasushi MATSUOKA, Kazuki NAGASHIMA, Hideyuki KASAI, Toshiyasu MURAYAMA
  • Publication number: 20230352913
    Abstract: A laser module includes: a first laser diode that emits a first light beam having a first wavelength; a second laser diode that emits a second light beam having a second wavelength different from the first wavelength; a fast-axis collimating lens disposed corresponding to each of the first and second laser diodes to collimate a fast-axis direction of each of the first and second light beams emitted from each of the first and second laser diodes; a slow-axis collimating lens disposed corresponding to each of the first and second laser diodes to collimate a slow-axis direction of each of the first and second light beams emitted from each of the first and second laser diodes; and a wavelength combining element including a volume Bragg grating (VBG) or a diffraction grating.
    Type: Application
    Filed: October 22, 2021
    Publication date: November 2, 2023
    Applicant: Fujikura Ltd.
    Inventor: Yohei Kasai
  • Patent number: 11515689
    Abstract: A semiconductor laser module includes: an optical fiber that outputs a first laser beam to an exterior of the semiconductor laser module; semiconductor laser devices each including an emission portion that emits a second laser beam, an electrically conductive portion that supplies electric power to the emission portion, and a mount on which the emission portion and the electrically conductive portion are disposed; a mount base including mount surfaces that form steps; and an optical system that optically couples the second laser beams from the emission portions to an incident end face of the optical fiber. The mounts of the semiconductor laser devices are disposed on the mount surfaces. The semiconductor laser devices include an upper semiconductor laser device and a lower semiconductor laser device adjacent to each other in a step direction of the mount base.
    Type: Grant
    Filed: December 26, 2018
    Date of Patent: November 29, 2022
    Assignee: Fujikura Ltd.
    Inventors: Ken Katagiri, Yohei Kasai
  • Patent number: 11451011
    Abstract: A laser module includes: an optical fiber; a plurality of semiconductor laser devices that includes a first semiconductor laser device and a second semiconductor laser device; a condenser lens that condenses laser beams emitted from the plurality of semiconductor laser devices and optically couples the laser beams to the optical fiber; a first terminal that supplies a first drive current to the first semiconductor laser device; and a second terminal that supplies a second drive current that to the second semiconductor laser device. The second drive current is smaller than the first drive current.
    Type: Grant
    Filed: December 13, 2018
    Date of Patent: September 20, 2022
    Assignee: Fujikura Ltd.
    Inventor: Yohei Kasai
  • Publication number: 20220181842
    Abstract: A laser module includes an optical fiber, a laser device, an optical system, a housing, a lead terminal, a conductive wire, and an insulation member. The laser device emits a laser beam. The optical system couples the laser beam, emitted from the laser device, to the optical fiber. The housing includes a base plate on which the laser device is fixed and a side wall that includes an opening. The lead terminal extends from an outside of the housing through the opening of the side wall into the housing. The conductive wire electrically connects a connecting portion of the lead terminal, located within the housing, to the laser device. The insulation member includes a seal portion and an extension portion.
    Type: Application
    Filed: March 16, 2020
    Publication date: June 9, 2022
    Applicant: FUJIKURA LTD.
    Inventors: Yoshihiro Tabata, Yohei Kasai
  • Patent number: 11309683
    Abstract: A laser module includes: a laser device that emits a laser beam including a major polarization component and a minor polarization component; a beam splitter that splits the laser beam into the major polarization component and the minor polarization component and that directs the major polarization component and the minor polarization component in different directions; an optical fiber that is optically coupled to the major polarization component split by the beam splitter and externally outputs the major polarization component; a package housing that houses the laser device and that has an inner surface including a minor polarization component irradiation portion that is irradiated by the minor polarization component split by the beam splitter; and a temperature measurement element that is attached to the package housing and that detects a temperature change of the minor polarization component irradiation portion.
    Type: Grant
    Filed: December 18, 2018
    Date of Patent: April 19, 2022
    Assignee: Fujikura Ltd.
    Inventor: Yohei Kasai
  • Publication number: 20210066891
    Abstract: A semiconductor laser module includes: an optical fiber that outputs a first laser beam to an exterior of the semiconductor laser module; semiconductor laser devices each including an emission portion that emits a second laser beam, an electrically conductive portion that supplies electric power to the emission portion, and a mount on which the emission portion and the electrically conductive portion are disposed; a mount base including mount surfaces that form steps; and an optical system that optically couples the second laser beams from the emission portions to an incident end face of the optical fiber. The mounts of the semiconductor laser devices are disposed on the mount surfaces. The semiconductor laser devices include an upper semiconductor laser device and a lower semiconductor laser device adjacent to each other in a step direction of the mount base.
    Type: Application
    Filed: December 26, 2018
    Publication date: March 4, 2021
    Applicant: FUJIKURA LTD.
    Inventors: Ken Katagiri, Yohei Kasai
  • Publication number: 20210013698
    Abstract: A laser module includes: a laser device that emits a laser beam including a major polarization component and a minor polarization component; a beam splitter that splits the laser beam into the major polarization component and the minor polarization component and that directs the major polarization component and the minor polarization component in different directions; an optical fiber that is optically coupled to the major polarization component split by the beam splitter and externally outputs the major polarization component; a package housing that houses the laser device and that has an inner surface including a minor polarization component irradiation portion that is irradiated by the minor polarization component split by the beam splitter; and a temperature measurement element that is attached to the package housing and that detects a temperature change of the minor polarization component irradiation portion.
    Type: Application
    Filed: December 18, 2018
    Publication date: January 14, 2021
    Applicant: Fujikura Ltd.
    Inventor: Yohei Kasai
  • Patent number: 10775571
    Abstract: An optical module including: a plurality of light emitting elements disposed on a same plane; a plurality of mirrors that reflect each light emitted from each of the plurality of light emitting elements; and a condenser lens into which each of the lights reflected by the plurality of mirrors enters. The plurality of mirrors reflects each of the lights emitted from each of the plurality of light emitting elements in a direction inclined with respect to a plane and aligns the light in a fast axis direction. Each of the lights emitted from the plurality of light emitting elements is reflected by the plurality of mirrors away from one another in the fast axis direction and is condensed at one point to reduce an aberration of light compared to a case where each of the lights enters into the condenser lens while propagating parallel to one another.
    Type: Grant
    Filed: December 28, 2017
    Date of Patent: September 15, 2020
    Assignee: Fujikura Ltd.
    Inventor: Yohei Kasai
  • Patent number: 10739538
    Abstract: A light-guiding device includes: a group of mirrors that converts a first beam bundle including a plurality of first laser beams into a second beam bundle including a plurality of second laser beams; a group of collimating lenses disposed at a stage previous to the group of mirrors and including collimating lenses that each collimate a divergence, in an F-axis direction, of a corresponding one of the plurality of first laser beams; and a converging lens disposed at a stage subsequent to the group of mirrors, the converging lens converges the second beam bundle by refracting each of the plurality of second laser beams.
    Type: Grant
    Filed: September 8, 2017
    Date of Patent: August 11, 2020
    Assignee: Fujikura Ltd.
    Inventor: Yohei Kasai
  • Publication number: 20200251880
    Abstract: A laser module includes: an optical fiber; a plurality of semiconductor laser devices that includes a first semiconductor laser device and a second semiconductor laser device; a condenser lens that condenses laser beams emitted from the plurality of semiconductor laser devices and optically couples the laser beams to the optical fiber; a first terminal that supplies a first drive current to the first semiconductor laser device; and a second terminal that supplies a second drive current that to the second semiconductor laser device. The second drive current is smaller than the first drive current.
    Type: Application
    Filed: December 13, 2018
    Publication date: August 6, 2020
    Applicant: FUJIKURA LTD.
    Inventor: Yohei Kasai
  • Patent number: 10668696
    Abstract: The present invention provides a bonding method (S1) which is capable of achieving a high adhesive force without carrying out any special treatment on the second member (14), even in a case where the first member (11) has a surface on which a gold thin film (12) is formed. The first member (11) is made of a material other than gold and has a surface on which the gold thin film (12) is formed. The bonding method (S1) includes the steps of: (S11) irradiating, with laser light, at least part of a specific region (12a) of the surface of the first member (11), so that a base of the thin film (12) is exposed in the at least part of the specific region (12a); and (S12) bonding the second member (14) to the specific region (12a) by use of an adhesive (13).
    Type: Grant
    Filed: December 22, 2016
    Date of Patent: June 2, 2020
    Assignee: FUJIKURA LTD.
    Inventors: Shohei Kumeta, Gento Yoshino, Yohei Kasai, Akira Sakamoto
  • Publication number: 20200110231
    Abstract: An optical module including: a plurality of light emitting elements disposed on a same plane; a plurality of mirrors that reflect each light emitted from each of the plurality of light emitting elements; and a condenser lens into which each of the lights reflected by the plurality of mirrors enters. The plurality of mirrors reflects each of the lights emitted from each of the plurality of light emitting elements in a direction inclined with respect to a plane and aligns the light in a fast axis direction. Each of the lights emitted from the plurality of light emitting elements is reflected by the plurality of mirrors away from one another in the fast axis direction and is condensed at one point to reduce an aberration of light compared to a case where each of the lights enters into the condenser lens while propagating parallel to one another.
    Type: Application
    Filed: December 28, 2017
    Publication date: April 9, 2020
    Applicant: FUJIKURA LTD.
    Inventor: Yohei Kasai
  • Publication number: 20200064567
    Abstract: A light-guiding device includes: a group of mirrors that converts a first beam bundle including a plurality of first laser beams into a second beam bundle including a plurality of second laser beams; a group of collimating lenses disposed at a stage previous to the group of mirrors and including collimating lenses that each collimate a divergence, in an F-axis direction, of a corresponding one of the plurality of first laser beams; and a converging lens disposed at a stage subsequent to the group of mirrors, the converging lens converges the second beam bundle by refracting each of the plurality of second laser beams.
    Type: Application
    Filed: September 8, 2017
    Publication date: February 27, 2020
    Applicant: FUJIKURA LTD.
    Inventor: Yohei Kasai
  • Patent number: 10473869
    Abstract: To increase the reliability of an LD module without decreasing the efficiency of coupling between the laser diode and the optical fiber, an LD module (1) includes a light-guiding device mounted therein that includes (i) a dividing optical system (DM) configured to divide a laser beam so as to generate a partial beam group and (ii) a compositing optical system (RM1, RM2, PRE, PBC) configured to composite the partial beam group so as to generate a partial beam bundle including a plurality of partial beams each having an S axis parallel to a particular spatial axis.
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: November 12, 2019
    Assignee: FUJIKURA LTD.
    Inventor: Yohei Kasai
  • Patent number: 10277003
    Abstract: In a laser device 1 in which a laser module 2 is mounted on a heat sink 3, a base plate 20 of the laser module 2 is fixed onto a mounting surface 3s of the heat sink 3 in such a manner that a peripheral part 20b is fixed to the heat sink 3 with screws. The elastic force of the base plate 20 causes stress in the direction toward the mounting surface 3s on the central part 20a of the base plate 20 surrounded by the peripheral part 20b.
    Type: Grant
    Filed: February 26, 2016
    Date of Patent: April 30, 2019
    Assignee: FUJIKURA LTD.
    Inventors: Shinichi Sakamoto, Yohei Kasai
  • Publication number: 20190049676
    Abstract: To increase the reliability of an LD module without decreasing the efficiency of coupling between the laser diode and the optical fiber, an LD module (1) includes a light-guiding device mounted therein that includes (i) a dividing optical system (DM) configured to divide a laser beam so as to generate a partial beam group and (ii) a compositing optical system (RM1, RM2, PRE, PBC) configured to composite the partial beam group so as to generate a partial beam bundle including a plurality of partial beams each having an S axis parallel to a particular spatial axis.
    Type: Application
    Filed: December 1, 2016
    Publication date: February 14, 2019
    Applicant: FUJIKURA LTD.
    Inventor: Yohei Kasai