Patents by Inventor Hwan Hong LIM

Hwan Hong LIM 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
  • 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
  • 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