Patents by Inventor Takunori Taira

Takunori Taira 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: 20220143752
    Abstract: A laser processing device according an embodiment is a laser processing device that irradiates a processing region of a workpiece with pulsed laser light through a liquid to subject the processing region to a laser peening process or a laser forming process. The laser processing device includes: a laser irradiation unit including a laser oscillator that outputs the pulsed laser light; and an accommodation unit that includes an injection port through which the liquid is injected to the processing region, and accommodates the laser irradiation unit. A pulse width of the pulsed laser light is 200 ps to 2 ns, and the pulsed laser light output from the laser oscillator is emitted to the processing region through a liquid that is injected from the injection port.
    Type: Application
    Filed: February 13, 2020
    Publication date: May 12, 2022
    Applicant: INTER-UNIVERSITY RESEARCH INSTITUTE CORPORATION NATIONAL INSTITUTES OF NATURAL SCIENCES
    Inventors: Takunori TAIRA, Yuji SANO, Lihe ZHENG, Hwan Hong LIM
  • Publication number: 20220059982
    Abstract: An optical oscillator according to an embodiment includes a first reflecting portion that transmits light having a first wavelength and reflects light having a second wavelength different from the first wavelength, a second reflecting portion that forms an unstable resonator together with the first reflecting portion and reflect light having the second wavelength, a laser medium that is disposed between the first reflecting portion and the second reflecting portion and emits light having the second wavelength due to incidence of light having the first wavelength, and a saturable absorption portion disposed on a side opposite to the first reflecting portion when viewed from the laser medium in the one direction, the first reflecting portion includes an incidence surface on which light having the first wavelength is incident, on a side opposite to the laser medium, a size of the second reflecting portion is smaller than a size of the first reflecting portion when viewed in the one direction, at least a part of
    Type: Application
    Filed: September 13, 2019
    Publication date: February 24, 2022
    Applicant: INTER-UNIVERSITY RESEARCH INSTITUTE CORPORATION NATIONAL INSTITUTES OF NATURAL SCIENCES
    Inventors: Takunori TAIRA, Hwan Hong LIM
  • Publication number: 20220010753
    Abstract: A laser ignition device includes an excitation light source that generates excitation light, and a pulsed laser oscillator connected to the excitation light source, wherein the pulsed laser oscillator generates a plurality of pulsed light beams at a time of one ignition to produce an initial flame.
    Type: Application
    Filed: September 27, 2021
    Publication date: January 13, 2022
    Applicants: IHI CORPORATION, IHI AEROSPACE Co., Ltd., INTER-UNIVERSITY RESEARCH INSTITUTE CORPORATION NATIONAL INSTITUTES OF NATURAL SCIENCES
    Inventors: Takahisa NAGAO, Mitsunori ITOU, Jun IZAWA, Yoshiki MATSUURA, Masahiro SASAKI, Takunori TAIRA
  • Publication number: 20210221692
    Abstract: A method of producing a substance includes a producing step of producing a new substance by, in a state in which a raw material absorbing giant pulse laser light is disposed inside a base material or in a state in which the base material and the raw material are brought into contact with each other and are clamped together, performing irradiation with the giant pulse laser light such that the raw material absorbs the giant pulse laser light and thereby generating shock waves such that at least the raw material undergoes phase transition.
    Type: Application
    Filed: May 14, 2019
    Publication date: July 22, 2021
    Applicant: INTER-UNIVERSITY RESEARCH INSTITUTE CORPORATION NATIONAL INSTITUTES OF NATURAL SCIENCES
    Inventors: Takunori TAIRA, Arvydas KAUSAS
  • Patent number: 10819078
    Abstract: A method for manufacturing an optical element includes a bonding step of bonding a first and a second element portion to each other without interposing an adhesive therebetween. The bonding step includes: a first step of fixing the first and the second element portion with an intermediate layer disposed between these portion, the intermediate layer containing an element substitutable for a constituent element of a bonded portion in the first and the second element portion, the intermediate layer being colored; and a second step of integrating a part of the intermediate layer with the first and the second element portion, and making a part of the intermediate layer transparent to laser light by irradiating the intermediate layer with giant pulse laser light and causing it to be absorbed into the intermediate layer after the first step.
    Type: Grant
    Filed: January 24, 2019
    Date of Patent: October 27, 2020
    Inventors: Takunori Taira, Arvydas Kausas
  • Patent number: 10806585
    Abstract: A translucent in-vivo indwelling device with a translucent region including a rare earth doped fluorapatite.
    Type: Grant
    Filed: November 27, 2015
    Date of Patent: October 20, 2020
    Assignee: INTER-UNIVERSITY RESEARCH INSTITUTE CORPORATION NATIONAL INSTITUTES OF NATURAL SCIENCES
    Inventors: Takunori Taira, Yoichi Sato, Junichi Nabekura, Hiroaki Wake
  • Patent number: 10374383
    Abstract: To provide a laser ignition device in which the ignition efficiency is improved and the laser pulse energy necessary for ignition is minimized by optimizing the pulse time width of laser. The laser ignition device includes: a pulse laser oscillator 1 configured to output a beam having a wavelength ? [?m] and a beam quality M2; an energy controller 2 configured to control energy of pulse laser outputted from the pulse laser oscillator 1; a lens 3 having a focal length f [mm] and configured to focus the pulse laser outputted from the pulse laser oscillator 1; and a pulse time width controller 14 configured to control a time width of the pulse laser, wherein the pulse time width controller 14 controls the time width of the pulse laser to be 0.6 to 2 ns.
    Type: Grant
    Filed: April 13, 2018
    Date of Patent: August 6, 2019
    Assignee: INTER-UNIVERSITY RESEARCH INSTITUTE CORPORATION NATIONAL INSTITUTES OF NATURAL SCIENCES
    Inventors: Takunori Taira, Hwan Hong Lim
  • Patent number: 10367324
    Abstract: A laser component is provided, including a laser medium and a transparent heat transmitting member, at least one of which is oxide. Bonding surfaces of the laser medium and the transparent heat transmitting member are exposed to oxygen plasma, and thereafter the bonding surfaces are brought into contact without heating. The laser medium and the transparent heat transmitting member are bonded at atomic levels, their thermal resistance is low, and no large residual stress is generated due to the bonding taking place under normal temperature. The process of oxygen plasma exposure ensures transparency of their bonding interface. The laser medium and the transparent heat transmitting member are stably bond via an amorphous layer.
    Type: Grant
    Filed: October 23, 2017
    Date of Patent: July 30, 2019
    Assignee: INTER-UNIVERSITY RESEARCH INSTITUTE CORPORATION NATIONAL INSTITUTES OF NATURAL SCIENCES
    Inventors: Takunori Taira, Arvydas Kausas, Lihe Zheng
  • Publication number: 20190229486
    Abstract: A method for manufacturing an optical element includes a bonding step of bonding a first and a second element portion to each other without interposing an adhesive therebetween. The bonding step includes: a first step of fixing the first and the second element portion with an intermediate layer disposed between these portion, the intermediate layer containing an element substitutable for a constituent element of a bonded portion in the first and the second element portion, the intermediate layer being colored; and a second step of integrating a part of the intermediate layer with the first and the second element portion, and making a part of the intermediate layer transparent to laser light by irradiating the intermediate layer with giant pulse laser light and causing it to be absorbed into the intermediate layer after the first step.
    Type: Application
    Filed: January 24, 2019
    Publication date: July 25, 2019
    Applicant: INTER-UNIVERSITY RESEARCH INSTITUTE CORPORATION NATIONAL INSTITUTES OF NATURAL SCIENCES
    Inventors: Takunori TAIRA, Arvydas KAUSAS
  • Publication number: 20180309261
    Abstract: To provide a laser ignition device in which the ignition efficiency is improved and the laser pulse energy necessary for ignition is minimized by optimizing the pulse time width of laser. The laser ignition device includes: a pulse laser oscillator 1 configured to output a beam having a wavelength ? [?m] and a beam quality M2; an energy controller 2 configured to control energy of pulse laser outputted from the pulse laser oscillator 1; a lens 3 having a focal length f [mm] and configured to focus the pulse laser outputted from the pulse laser oscillator 1; and a pulse time width controller 14 configured to control a time width of the pulse laser, wherein the pulse time width controller 14 controls the time width of the pulse laser to be 0.6 to 2 ns.
    Type: Application
    Filed: April 13, 2018
    Publication date: October 25, 2018
    Applicant: INTER-UNIVERSITY RESEARCH INSTITUTE CORPORATION NATIONAL INSTITUTES OF NATURAL SCIENCES
    Inventors: Takunori TAIRA, Hwan Hong LIM
  • Patent number: 10090630
    Abstract: A laser ignition device capable of achieving stable ignition, preventing deterioration of a semiconductor laser element is provided, by suppressing the intensity of oscillated light leakage leaking towards semiconductor laser side from the laser resonator with a simple configuration. A laser ignition device 7 includes an excitation light source 1 emitting coherent excitation light LPMP, an optical element 2 transmitting excitation light LPMP, a laser resonator 3 oscillating oscillated light having high energy density by being irradiated with excitation light LPMP, and condensing means 6 condensing the oscillated light LPLS oscillated by the laser resonator 3. Moreover, the laser ignition device 7 is provided with a light-transmissive-reflective film 5 disposed between the excitation light source 1 and the laser resonator 3. The light-transmissive-reflective film 5 permeating the excitation light LPMP having short wavelength and reflecting oscillated light leakage LLEAK having long wavelength.
    Type: Grant
    Filed: March 4, 2015
    Date of Patent: October 2, 2018
    Assignees: DENSO CORPORATION, INTER-UNIVERSITY RESEARCH INSTITUTE CORPORATION NATIONAL INSTITUTES OF NATURAL SCIENCES
    Inventors: Kenji Kanehara, Akimitsu Sugiura, Takunori Taira
  • Patent number: 10056730
    Abstract: Both of multi-mode laser beam 8A and excitation beam 34A for amplification are imputed to an amplification gain medium 62 in a relationship in which their optical axes match each other and an effective beam diameter of the excitation beam for amplification is smaller than an effective beam diameter of the multi-mode laser beam. As a result, laser beam of a part of modes progressing in a radiation range of the excitation beam 34A for amplification is selectively amplified. Laser beam 40A subjected to mode cleaning is thereby outputted.
    Type: Grant
    Filed: September 5, 2017
    Date of Patent: August 21, 2018
    Assignee: INTER-UNIVERSITY RESEARCH INSTITUTE CORPORATION NATIONAL INSTITUTES OF NATURAL SCIENCES
    Inventors: Takunori Taira, Vincent Yahia
  • Publication number: 20180123309
    Abstract: A laser component is provided, including a laser medium and a transparent heat transmitting member, at least one of which is oxide. Bonding surfaces of the laser medium and the transparent heat transmitting member are exposed to oxygen plasma, and thereafter the bonding surfaces are brought into contact without heating. The laser medium and the transparent heat transmitting member are bonded at atomic levels, their thermal resistance is low, and no large residual stress is generated due to the bonding taking place under normal temperature. The process of oxygen plasma exposure ensures transparency of their bonding interface. The laser medium and the transparent heat transmitting member are stably bond via an amorphous layer.
    Type: Application
    Filed: October 23, 2017
    Publication date: May 3, 2018
    Applicant: INTER-UNIVERSITY RESEARCH INSTITUTE CORPORATION NA TIONAL INSTITUTES OF NATURAL SCIENCES
    Inventors: Takunori TAIRA, Arvydas KAUSAS, Lihe ZHENG
  • Publication number: 20180069368
    Abstract: Both of multi-mode laser beam 8A and excitation beam 34A for amplification are imputed to an amplification gain medium 62 in a relationship in which their optical axes match each other and an effective beam diameter of the excitation beam for amplification is smaller than an effective beam diameter of the multi-mode laser beam. As a result, laser beam of a part of modes progressing in a radiation range of the excitation beam 34A for amplification is selectively amplified. Laser beam 40A subjected to mode cleaning is thereby outputted.
    Type: Application
    Filed: September 5, 2017
    Publication date: March 8, 2018
    Applicant: INTER-UNIVERSITY RESEARCH INSTITUTE CORP. NATIONAL INSTITUTES OF NATURAL SCIENCES
    Inventors: Takunori TAIRA, Vincent YAHIA
  • Patent number: 9887511
    Abstract: Provided is a passive Q-switch laser device possessing a power density controller (15) making power density of excitation light from an excitation light source (14) equal to or greater than power density so that delay time required for reaching oscillation after start of excitation of a laser gain medium (12) becomes equal to or shorter than a laser upper energy level lifetime of the laser gain medium (12).
    Type: Grant
    Filed: January 9, 2017
    Date of Patent: February 6, 2018
    Assignee: INTER-UNIVERSITY RESEARCH INSTITUTE CORPORATION NATIONAL INSTITUTE OF NATURAL SCIENCES
    Inventors: Takunori Taira, Arvydas Kausas, Lihe Zheng
  • Publication number: 20170358898
    Abstract: A technique which is suitable in joining an end surface of a laser medium to a transparent heat sink for maintaining thermal resistance therebetween low and avoiding large thermal stress from acting on the laser medium is to be provided. An end coat is provided on the end surface of the laser medium, a same-material layer constituted of a same material as the heat sink is provided on a surface of the end coat, a surface of the same-material layer and an end surface of the heat sink are activated in a substantially vacuum environment, and those activated surfaces are bonded in the substantially vacuum environment. A laser apparatus having low thermal resistance between the laser medium and the heat sink and high transparency at a joint interface therebetween, and no large thermal stress acting on the laser medium is thereby obtained.
    Type: Application
    Filed: May 31, 2017
    Publication date: December 14, 2017
    Applicant: INTER-UNIVERSITY RESEARCH INSTITUTE CORPORATION NATIONAL INSTITUTES OF NATURAL SCIENCES
    Inventors: Takunori TAIRA, Arvydas KAUSAS, Lihe ZHENG, Vincent YAHIA, Ryo YASUHARA
  • Publication number: 20170325961
    Abstract: A translucent in-vivo indwelling device with a translucent region including a rare earth doped fluorapatite.
    Type: Application
    Filed: November 27, 2015
    Publication date: November 16, 2017
    Applicant: INTER-UNIVERSITY RESEARCH INSTITUTE CORPORATION NATIONAL INSTITUTES OF NATURAL SCIENCES
    Inventors: Takunori TAIRA, Yoichi SATO, Junichi NABEKURA, Hiroaki WAKE
  • Publication number: 20170201061
    Abstract: Provided is a passive Q-switch laser device possessing a power density controller (15) making power density of excitation light from an excitation light source (14) equal to or greater than power density so that delay time required for reaching oscillation after start of excitation of a laser gain medium (12) becomes equal to or shorter than a laser upper energy level lifetime of the laser gain medium (12).
    Type: Application
    Filed: January 9, 2017
    Publication date: July 13, 2017
    Applicant: INTER-UNIVERSITY RESEARCH INSTITUTE CORPORATION NATIONAL INSTITUTES OF NATURAL
    Inventors: Takunori TAIRA, Arvydas KAUSAS, Lihe ZHENG
  • Publication number: 20170107966
    Abstract: A laser ignition device capable of achieving stable ignition, preventing deterioration of a semiconductor laser element is provided, by suppressing the intensity of oscillated light leakage leaking towards semiconductor laser side from the laser resonator with a simple configuration. A laser ignition device 7 includes an excitation light source 1 emitting coherent excitation light LPMP, an optical element 2 transmitting excitation light LPMP, a laser resonator 3 oscillating oscillated light having high energy density by being irradiated with excitation light LPMP, and condensing means 6 condensing the oscillated light LPLS oscillated by the laser resonator 3. Moreover, the laser ignition device 7 is provided with a light-transmissive-reflective film 5 disposed between the excitation light source 1 and the laser resonator 3. The light-transmissive-reflective is film 5 permeating the excitation light LPMP having short wavelength and reflecting oscillated light leakage LLEAK having long wavelength.
    Type: Application
    Filed: March 4, 2015
    Publication date: April 20, 2017
    Inventors: Kenji KANEHARA, Akimitsu SUGIURA, Takunori TAIRA
  • Patent number: 9384888
    Abstract: Upon producing a transparent polycrystalline material, a suspension liquid (or slurry 1) is prepared, the suspension liquid being made by dispersing a raw-material powder in a solution, the raw-material powder including optically anisotropic single-crystalline particles to which a rare-earth element is added. A formed body is obtained from the suspension liquid by means of carrying out slip casting in a space with a magnetic field applied. On this occasion, while doing a temperature control so that the single-crystalline particles demonstrate predetermined magnetic anisotropy, one of static magnetic fields and rotary magnetic fields is selected in compliance with a direction of an axis of easy magnetization in the single-crystalline particles, and is then applied to them. A transparent polycrystalline material is obtained by sintering the formed body, the transparent polycrystalline material having a polycrystalline structure whose crystal orientation is controlled.
    Type: Grant
    Filed: May 23, 2013
    Date of Patent: July 5, 2016
    Assignees: INTER-UNIVERSITY RESEARCH INSTITUTE CORPORATION, NATIONAL INSTITUTES OF NATURAL SCIENCES, GENESIS RESEARCH INSTITUTE, INCORPORATED
    Inventors: Takunori Taira, Jun Akiyama, Shigeo Asai, Kunihiko Hara