Patents by Inventor Tatsushi Igarashi

Tatsushi Igarashi 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: 20220379137
    Abstract: An optical filter which is used in an inactivation processing device that performs inactivation processing on a processing target microorganism. The optical filter, when discharge light from a light source in which the center wavelength of the discharge light is between 190 nm and 237 nm is incident at an incident angle 0°, transmits at least a portion of the ultraviolet ray equal to or greater than 190 nm and equal to or less than 230 nm and at least a portion of the ultraviolet ray greater than 230 nm and equal to or less than 237 nm, and attenuates the light intensity between 200 and 280 nm not including a wavelength region equal to or greater than 190 nm and equal to or less than 237 nm.
    Type: Application
    Filed: August 9, 2022
    Publication date: December 1, 2022
    Applicant: Ushio Denki Kabushiki Kaisha
    Inventor: Tatsushi IGARASHI
  • Publication number: 20220323624
    Abstract: Disclosed herein is an inactivation apparatus for inactivating microorganisms and/or viruses, comprising: an ultraviolet light irradiation unit configured to irradiate a surface or a space in a facility or a vehicle that a human or an animal is present with light including ultraviolet light having a wavelength that inactivates the microorganisms and/or viruses; and a controller unit configured to control irradiation and non-irradiation of the light by the ultraviolet light irradiation unit. The ultraviolet light included in the light emitted from the ultraviolet light irradiation unit is light having a wavelength range between 190 nm to 235 nm. The controller unit controls the ultraviolet light irradiation unit to alternately repeat a light-emitting operation and a non-light-emitting operation of the light based on the wavelength of the ultraviolet light included in the light irradiated from the ultraviolet light irradiation unit.
    Type: Application
    Filed: March 1, 2021
    Publication date: October 13, 2022
    Applicant: Ushio Denki Kabushiki Kaisha
    Inventors: Tatsushi IGARASHI, Hiroyuki OHASHI, Yoshihiko OKUMURA, Atsushi IMAMURA
  • Publication number: 20220288247
    Abstract: A sterilizing device includes a housing having an opening in at least one direction thereof. The housing also has a hollow portion configured to allow insertion of an object (target) including part of a human body from the opening into the hollow portion. The sterilizing device also includes at least one air blower unit configured to send a flow of air toward an interior of the hollow portion, and at least one ultraviolet light emitting unit configured to emit ultraviolet light toward the interior of the hollow portion. The ultraviolet light emitted from each ultraviolet light emitting unit includes at least part of ultraviolet light having a wavelength between 190 nm and 230 nm and at least part of ultraviolet light having a wavelength between 230 nm and 237 nm, but does not include ultraviolet light having a wavelength below 190 nm and beyond 237 nm.
    Type: Application
    Filed: May 27, 2022
    Publication date: September 15, 2022
    Applicant: USHIO DENKI KABUSHIKI KAISHA
    Inventor: Tatsushi IGARASHI
  • Patent number: 11433151
    Abstract: Disclosed are a microbe inactivation processing method that can perform inactivation processing of microbes, while damage to human body cells is prevented or inhibited, with an efficient use of light emitted from a light source and the obtainment of a large effective irradiation area. Also provided are a cell activation processing method that can reliably activate target cells with high efficiency. The microbe inactivation processing method includes: a step of applying light emitted from a light source through an optical filter, with the light source configured to emit light having a wavelength within a wavelength range of 190 nm to 237 nm, in order to perform inactivation processing of a target microbe.
    Type: Grant
    Filed: October 20, 2020
    Date of Patent: September 6, 2022
    Assignee: Ushio Denki Kabushiki Kaisha
    Inventor: Tatsushi Igarashi
  • Publication number: 20220241444
    Abstract: Disclosed herein is an inactivation apparatus for inactivating microorganisms and/or viruses by emitting light. The inactivation apparatus comprises: a light irradiation unit including a light source configured to emit light having a wavelength range that inactivates microorganisms and/or viruses, the light source emitting the light in a space where a human is present and the microorganisms and/or viruses exists; and a controller unit configured to control irradiation of the light by the light source. The light is ultraviolet light having a wavelength range of 200 nm to 235 nm, and the controller unit controls the light source to limit an effective incident irradiance of the ultraviolet light on an eye of the human present in the space to be within a certain irradiance range.
    Type: Application
    Filed: February 1, 2022
    Publication date: August 4, 2022
    Applicant: Ushio Denki Kabushiki Kaisha
    Inventors: Tatsushi IGARASHI, Yoshihiko Okumura
  • Publication number: 20220062473
    Abstract: A lighting device having a function of inactivating bacteria or viruses includes a first light source for emitting ultraviolet light with a peak wavelength in a wavelength band of 200 nm or more and less than 240 nm and with light intensity suppressed in a wavelength band of 250 nm or more and less than 400 nm, and a second light source that is composed of an LED element for emitting white light for illumination.
    Type: Application
    Filed: August 5, 2021
    Publication date: March 3, 2022
    Applicant: Ushio Denki Kabushiki Kaisha
    Inventors: Keisuke Naito, Hideaki Yagyu, Tatsushi Igarashi, Hiroyuki Ohashi
  • Patent number: 11007378
    Abstract: Disclosed is a sterilization apparatus that can kill or inactivate sterilization target organisms present on a body or in the body without damage to human cells and has high energy efficiency. A sterilization apparatus is configured to irradiate a sterilization target organism on a body or in the body with light and thereby killing or inactivating the sterilization target organism. The sterilization apparatus includes: a light source configured to emit light having wavelengths within a wavelength range of 190 nm to 230 nm and a wavelength range of 230 to 300 nm; a power supply unit configured to supply power to the light source; a control unit configured to control the power supply unit; and an optical filter. The power supply unit is controlled by the control unit so that an irradiation amount of light having a wavelength within the wavelength range of 230 to 300 nm in one light irradiation is not more than 9 mJ/cm2.
    Type: Grant
    Filed: January 30, 2017
    Date of Patent: May 18, 2021
    Assignee: Ushio Denki Kabushiki Kaisha
    Inventors: Tatsushi Igarashi, Koichi Kamei
  • Publication number: 20210030906
    Abstract: Disclosed are a microbe inactivation processing method that can perform inactivation processing of microbes, while damage to human body cells is prevented or inhibited, with an efficient use of light emitted from a light source and the obtainment of a large effective irradiation area. Also provided are a cell activation processing method that can reliably activate target cells with high efficiency. The microbe inactivation processing method includes: a step of applying light emitted from a light source through an optical filter, with the light source configured to emit light having a wavelength within a wavelength range of 190 nm to 237 nm, in order to perform inactivation processing of a target microbe.
    Type: Application
    Filed: October 20, 2020
    Publication date: February 4, 2021
    Applicant: Ushio Denki Kabushiki Kaisha
    Inventor: Tatsushi IGARASHI
  • Patent number: 10864287
    Abstract: Disclosed are a microbe inactivation processing method that can perform inactivation processing of microbes, while damage to human body cells is prevented or inhibited, with an efficient use of light emitted from a light source and the obtainment of a large effective irradiation area. Also provided are a cell activation processing method that can reliably activate target cells with high efficiency. The microbe inactivation processing method includes: a step of applying light emitted from a light source through an optical filter, with the light source configured to emit light having a wavelength within a wavelength range of 190 nm to 237 nm, in order to perform inactivation processing of a target microbe.
    Type: Grant
    Filed: December 26, 2018
    Date of Patent: December 15, 2020
    Assignee: Ushio Denki Kabushiki Kaisha
    Inventor: Tatsushi Igarashi
  • Patent number: 10786586
    Abstract: Disclosed are a microbe inactivation processing device that can perform inactivation processing of microbes, while damage to human body cells is prevented or inhibited, with an efficient use of light emitted from a light source and the obtainment of a large effective irradiation area. Also provided are a cell activation processing device that can reliably activate target cells with high efficiency. The microbe inactivation processing device includes: a light source configured to emit light having a wavelength within a wavelength range of 190 nm to 237 nm; a power supply unit configured to supply electric power to the light source; a control unit configured to control the power supply unit; and an optical filter. The microbe inactivation processing device is configured to perform inactivation processing of a target microbe by applying the light emitted from the light source through the optical filter.
    Type: Grant
    Filed: December 26, 2018
    Date of Patent: September 29, 2020
    Assignee: Ushio Denki Kabushiki Kaisha
    Inventor: Tatsushi Igarashi
  • Publication number: 20190321499
    Abstract: A sterilizing device includes a housing having an opening in at least one direction thereof. The housing also has a hollow portion configured to allow insertion of an object (target) including part of a human body from the opening into the hollow portion. The sterilizing device also includes at least one air blower unit configured to send a flow of air toward an interior of the hollow portion, and at least one ultraviolet light emitting unit configured to emit ultraviolet light toward the interior of the hollow portion. The ultraviolet light emitted from each ultraviolet light emitting unit includes at least part of ultraviolet light having a wavelength between 190 nm and 230 nm and at least part of ultraviolet light having a wavelength between 230 nm and 237 nm, but does not include ultraviolet light having a wavelength below 190 nm and beyond 237 nm.
    Type: Application
    Filed: April 22, 2019
    Publication date: October 24, 2019
    Applicant: USHIO DENKI KABUSHIKI KAISHA
    Inventor: Tatsushi IGARASHI
  • Publication number: 20190192709
    Abstract: Disclosed are a microbe inactivation processing method that can perform inactivation processing of microbes, while damage to human body cells is prevented or inhibited, with an efficient use of light emitted from a light source and the obtainment of a large effective irradiation area. Also provided are a cell activation processing method that can reliably activate target cells with high efficiency. The microbe inactivation processing method includes: a step of applying light emitted from a light source through an optical filter, with the light source configured to emit light having a wavelength within a wavelength range of 190 nm to 237 nm, in order to perform inactivation processing of a target microbe.
    Type: Application
    Filed: December 26, 2018
    Publication date: June 27, 2019
    Applicant: Ushio Denki Kabushiki Kaisha
    Inventor: Tatsushi IGARASHI
  • Publication number: 20190192708
    Abstract: Disclosed are a microbe inactivation processing device that can perform inactivation processing of microbes, while damage to human body cells is prevented or inhibited, with an efficient use of light emitted from a light source and the obtainment of a large effective irradiation area. Also provided are a cell activation processing device that can reliably activate target cells with high efficiency. The microbe inactivation processing device includes: a light source configured to emit light having a wavelength within a wavelength range of 190 nm to 237 nm; a power supply unit configured to supply electric power to the light source; a control unit configured to control the power supply unit; and an optical filter. The microbe inactivation processing device is configured to perform inactivation processing of a target microbe by applying the light emitted from the light source through the optical filter.
    Type: Application
    Filed: December 26, 2018
    Publication date: June 27, 2019
    Applicant: Ushio Denki Kabushiki Kaisha
    Inventor: Tatsushi IGARASHI
  • Publication number: 20190038914
    Abstract: Disclosed is a sterilization apparatus that can kill or inactivate sterilization target organisms present on a body or in the body without damage to human cells and has high energy efficiency. A sterilization apparatus is configured to irradiate a sterilization target organism on a body or in the body with light and thereby killing or inactivating the sterilization target organism. The sterilization apparatus includes: a light source configured to emit light having wavelengths within a wavelength range of 190 nm to 230 nm and a wavelength range of 230 to 300 nm; a power supply unit configured to supply power to the light source; a control unit configured to control the power supply unit; and an optical filter. The power supply unit is controlled by the control unit so that an irradiation amount of light having a wavelength within the wavelength range of 230 to 300 nm in one light irradiation is not more than 9 mJ/cm2.
    Type: Application
    Filed: January 30, 2017
    Publication date: February 7, 2019
    Applicant: Ushio Denki Kabushiki Kaisha
    Inventors: Tatsushi IGARASHI, Koichi KAMEI
  • Patent number: 9599812
    Abstract: Disclosed herein a rotational type foil trap that is capable of avoiding the transmission rate of the EUV light to be lowered even when the EUV light source operates with the high input power and also suppressing the temperature increase of the foil to attain a sufficient life duration. In the rotational type foil trap, one end of each of foils is inserted into each of a plurality of grooves provided on a side face of a center support, and the center support and the each of the foils are fixed together by brazing.
    Type: Grant
    Filed: September 5, 2014
    Date of Patent: March 21, 2017
    Assignee: USHIO DENKI KABUSHIKI KAISHA
    Inventors: Christof Metzmacher, Hermann Giese, Achim Weber, Hironobu Yabuta, Rolf Theo Anton Apetz, Tatsushi Igarashi, Hiroto Sato, Noritaka Ashizawa
  • Publication number: 20160195714
    Abstract: Disclosed herein a rotational type foil trap that is capable of avoiding the transmission rate of the EUV light to be lowered even when the EUV light source operates with the high input power and also suppressing the temperature increase of the foil to attain a sufficient life duration. In the rotational type foil trap, one end of each of foils is inserted into each of a plurality of grooves provided on a side face of a center support, and the center support and the each of the foils are fixed together by brazing.
    Type: Application
    Filed: September 5, 2014
    Publication date: July 7, 2016
    Applicant: USHIO DENKI KABUSHIKI KAISHA
    Inventors: Christof METZMACHER, Hermann GIESE, Achim WEBER, Hironobu YABUTA, Rolf Theo Anton APETZ, Tatsushi IGARASHI, Hiroto SATO, Noritaka ASHIZAWA
  • Patent number: 5986402
    Abstract: A metal halide lamp with a distance of less than 3.0 mm between the electrodes, in which in the hermetically sealed portion no cracks occur, which can be produced without difficulty, and which enables advantageous operation is achieved with a halide lamp in which an arc tube made of quartz glass contains a cathode and an anode spaced from each other at a distance of less than or equal to 2.9 mm together with mercury and metal halides, and which is operated with a nominal wattage range of from 100 to 400 W using direct current, by causing the ratio D/H to be greater than or equal to 1.9 when D is the maximum inside diameter in millimeters in a direction which orthogonally intersects the axial direction of the electrodes in the discharge space and H is the length of the cathode projecting within the discharge space, also in millimeters.
    Type: Grant
    Filed: October 30, 1997
    Date of Patent: November 16, 1999
    Assignee: Ushiodenki Kabushiki Kaisha
    Inventors: Mitsuo Narita, Akihiko Sugitani, Yoshihiro Horikawa, Takashi Ito, Tatsushi Igarashi
  • Patent number: 5861715
    Abstract: A discharge lamp in which ultraviolet radiation of short wavelengths can be advantageously cut and in which the amount of emitted light (i-line) of 365 nm wavelength can be increased is achieved according to the invention by providing a quartz glass arc tube that is coated with a plurality of coating layers which include a layer which has Ta.sub.2 O.sub.5 as the main component, and at least one additional coating layer which has a refraction coefficient which differs from the refraction coefficient of the coating layer having the Ta.sub.2 O.sub.5 main component. These layers act to prevent the reflection of light with a wavelength of 365 nm which is incident on the coatings on the arc tube and to cut at least 50% of the ultraviolet radiation having wavelengths of 230 nm or less. According to the invention, the coating layers can be provided on the outer side of the arc tube, on the inner side of the arc tube, or on both on the inner and outer sides of the arc tube.
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: January 19, 1999
    Assignee: Ushiodenki Kabushiki Kaisha
    Inventors: Tatsushi Igarashi, Osamu Mizuno, Kazuo Nakamura, Shoichi Mayama
  • Patent number: 5763999
    Abstract: A light source device in which the radiated light from the dielectric barrier discharge lamp can always be stabilized even if the discharge vessel of the dielectric barrier discharge lamp is large or the load on the tube wall within the discharge vessel is small. This is achieved according to the invention by the provision of a light source device having a discharge lamp which has a generally cylindrical, coaxial double-tube arrangement of an outer tube and an inner tube, in which there is an outer electrode on the outer tube, in which there is an inner electrode on the inner tube, and in which a discharge space between the inner and outer tubes is filled with a discharge gas for formation of excimer molecules by a dielectric barrier discharge, and of a power source for operating this discharge lamp in accordance with the relationship: Vs/Vp.ltoreq.0.5 where Vs is the starting voltage and Vp is the voltage applied to the discharge lamp during steady-state luminous operation.
    Type: Grant
    Filed: September 20, 1995
    Date of Patent: June 9, 1998
    Assignee: Ushiodenki Kabushiki Kaisha
    Inventors: Hiromitsu Matsuno, Nobuyuki Hishinuma, Masashi Okamoto, Tatsushi Igarashi, Fumitoshi Takemoto
  • Patent number: 5757132
    Abstract: To maintain the relative positional relationship between an inner tube and an inner electrode of a dielectric barrier discharge tube having a roughly cylindrical, double tube arrangement of an outer tube coaxially arranged about an inner tube with a discharge space defined therebetween, an outer electrode on an outer surface of the outer tube, an inner electrode on an inner surface of the inner tube, and a discharge gas which forms excimer molecules by a dielectric barrier discharge filling said discharge space, despite repeated expansion and contraction of the inner electrode due to the dielectric barrier discharge lamp being repeatedly turned on and off, according to the invention, the inner electrode is formed of a substantially tubular metal component or the like, and a motion preventing component is provided at opposite ends of the inner electrode for maintaining an axial position of the inner electrode relative to the inner tube.
    Type: Grant
    Filed: October 2, 1996
    Date of Patent: May 26, 1998
    Assignee: Ushiodenki Kabushiki Kaisha
    Inventors: Hiromitsu Matsuno, Nobuyuki Hishinuma, Kenichi Hirose, Kunio Kasagi, Fumitoshi Takemoto, Yoshinori Aiura, Tatsushi Igarashi