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: 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: 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: 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: 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
  • Patent number: 5739636
    Abstract: A cadmium discharge lamp which can emit line spectra with wavelengths of 214.+-.2 nm with high power is achieved by encapsulating metallic cadmium, in an amount producing a pressure in stationary lighting operation in the range from 2 kPa to 13.7 kPa, together with at least one of the rare gases xenon, krypton, argon and neon, in a temperature-controlled arc tube which is provided with electrodes located adjacently opposite one another, and by operating the lamp such that J/P is in the range from 1.4 to 75, where J is the discharge current in stationary lighting operation in amperes and the P is the cadmium pressure in stationary lighting operation.
    Type: Grant
    Filed: January 22, 1996
    Date of Patent: April 14, 1998
    Assignee: Ushiodenki Kabushiki Kaisha
    Inventors: Akiyasu Yamaguchi, Yukio Yasuda, Hiromitsu Matsuno, Tatsushi Igarashi
  • Patent number: 5666026
    Abstract: A dielectric barrier discharge lamp having a generally cylindrical double-tube arrangement of an outer tube coaxially disposed about an inner tube, with an outer electrode disposed on an outside surface of the outer tube, an inner electrode disposed on an inside surface of the inner tube, and a discharge space provided between the outer tube and the inner tube which is filled with a discharge gas for formation of excimer molecules by dielectric barrier discharge achieves firm engagement of the inner electrode against the inner tube and a stable discharge over a long time even if part of the electrode corrodes due to the ozone produced or it wears. This is achieved by embodiments in which the inner electrode is a generally tubular part which is slit in an axial direction along the full length thereof. The tubular part can be a single cylindrically sheet having opposite longitudinally extending edges spaced from each other by a gap or overlapped.
    Type: Grant
    Filed: September 20, 1995
    Date of Patent: September 9, 1997
    Assignee: Ushiodenki Kabushiki Kaisha
    Inventors: Hiromitsu Matsuno, Nobuyuki Hishinuma, Kenichi Hirose, Kunio Kasagi, Fumitoshi Takemoto, Yoshinori Aiura, Tatsushi Igarashi
  • Patent number: 5589735
    Abstract: An emission device which operates a cadmium lamp with a light intensity sufficient for used in industrial applications is achieved by an emission device having a cadmium lamp with a fluorescent tube within which a cathode and an anode are space a small distance apart and a buffer gas for easier initiation of luminous operation and metallic cadmium in an amount per unit volume of the fluorescent tube of 1.times.10.sup.-4 g/cm.sup.3 to 3.times.10.sup.-3 g/cm.sup.3 are encapsulated, and a power source device for supplying an electrical input between the cathode and the anode in an electrical input range from 0.5 kW to 5.0 kW with the condition:6.03+2.79 W.ltoreq.r.ltoreq.40being satisfied, where the electrical input of the power source device into the cadmium lamp in steady-state luminous operation is W (kW) and the maximum inside radius of the fluorescent tube is r (mm).
    Type: Grant
    Filed: July 25, 1995
    Date of Patent: December 31, 1996
    Assignee: Ushiodenki Kabushiki Kaisha
    Inventors: Akiyasu Yamaguchi, Yukio Yasuda, Tsuneo Okanuma, Tatsushi Igarashi, Hiromitsu Matsuno, Tatsumi Hiramoto
  • Patent number: 5581152
    Abstract: In a dielectric barrier discharge lamp, in which a discharge vessel, in which a discharge gas forming "excimer" molecules is encapsulated, is provided with a dielectric provided with a netlike electrode and a window, through which the light goes, the first object of the invention is achieved by an arrangement in which a thickness of ends of the above-described netlike electrodes is greater than the average thickness of the entire electrode. Another object of the invention is achieved by an arrangement in which a holder incorporated in the discharge vessel has an outer dimension that is less than/equal to an outer dimension of the netlike electrodes. A further object of the invention is achieved by an arrangement by which the discharge vessel has a hollow cylindrical shape formed from an external tube and an internal tube and a means for hermetic sealing is arranged inside the internal tube.
    Type: Grant
    Filed: September 8, 1994
    Date of Patent: December 3, 1996
    Assignee: Ushiodenki Kabushiki Kaisha
    Inventors: Hiromitsu Matsuno, Tatsushi Igarashi, Tatsumi Hiramoto, Fumitoshi Takemoto, Nobuyuki Hishinuma, Yasuo Oonishi, Kunio Kasagi, Takashi Asahina, Yasuhiko Wakahata
  • Patent number: 5542867
    Abstract: A process for connecting a molybdenum foil to a lead portion with sufficient strength and reliability in which an expensive binder, such as platinum, platinum clad molybdenum, or the like, is not used. According to the invention, a carbon containing or carbon coated molybdenum part is placed between the molybdenum foil and the molybdenum lead portion and then the two are resistance welded to one another. Furthermore, a hermetically enclosed part of a lamp can be produced by this process.
    Type: Grant
    Filed: December 7, 1994
    Date of Patent: August 6, 1996
    Assignee: Ushiodenki Kabushiki Kaisha
    Inventors: Nobuyuki Hishinuma, Kenichi Hirose, Tatsushi Igarashi
  • Patent number: 5541481
    Abstract: A cadmium rare gas discharge lamp of the short arc type that has a high power of the spectra in a wavelength range of 210 nm to 230 nm and a stable lamp voltage in lighting operation for a long period. An arc tube 1 is provided within which are disposed opposed, spaced apart electrodes 2, 3 and thermal insulation films 6, 7. A rare gas is encapsulated together with metal cadmium and a quartz glass is used for the material of the arc tube whose OH radical has a weight content of no more than 200 ppm. Electrodes 4 and 5 are spaced apart no more than 10 mm, so that with a lamp current at least 20 amperes, an arc of the electrode-stable type is formed and radiant light of Cd ions obtained. For the encapsulated rare gas, in one embodiment at least one of the rare gases neon, argon or krypton, are used and are encapsulated at a gas pressure of 35 kPa to 2.5 MPa at a standard temperature of 25.degree. C. The arc tube 1 is formed of quartz glass, electrodes 2 and 3 are placed opposite one another.
    Type: Grant
    Filed: July 29, 1994
    Date of Patent: July 30, 1996
    Assignee: Ushiodenki Kabushiki Kaisha
    Inventors: Akiyasu Yamaguchi, Yukio Yasuda, Hiromitsu Matsuno, Tatsushi Igarashi
  • Patent number: 5510158
    Abstract: An oxidation process for an article to be treated in which, by generating ozone with a high concentration, a high treatment rate is achieved. In particular, an oxygen-containing fluid is irradiated with a vacuum ultraviolet rays emitted from a dielectric barrier discharge lamp in which xenon gas is encapsulated, producing a photochemical reaction from which ozone and an activated oxygen result. By causing this ozone and activated oxygen to contact the surface of the article to be treated, the surface of the article is oxidized. An even higher treatment rate can be achieved by generating the activated oxygen with the simultaneous use of a far ultraviolet ray source, thereby increasing the activity of the activated oxygen. Advantageously, the oxidation of the article to be treated with the vacuum ultraviolet rays and far ultraviolet rays is performed in accordance with the relationship:(p.times.d)/(1+I.sup.1/2)=0.33where I is a radiation density (mW/cm.sup.
    Type: Grant
    Filed: November 28, 1994
    Date of Patent: April 23, 1996
    Assignee: Ushiodenki Kabushiki Kaisha
    Inventors: Tatsumi Hiramoto, Tatsushi Igarashi, Hiromitsu Matsuno, Takeo Matsushima, Shinichi Iso