Patents by Inventor Koichi Nittoh

Koichi Nittoh 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: 10473597
    Abstract: A neutron grid, comprises: a grid including: a plurality of spacers through which at least a part of first neutrons from a target passes; and a plurality of absorbers to absorb at least a part of second neutrons scattered thorough the target, the spacers and the absorbers being alternately arranged along a first direction and extending along a second direction intersecting with the first direction; and a pair of covers through which at least a part of the first neutrons and at least a part of the second neutrons pass, sandwiching the grid along a third direction intersecting with the first and second directions. A thermal expansion coefficient difference between one of the spacers and one of the absorbers is ±9×10?6/° C. or less, or Young's modulus of the spacer is 100 GPa or more.
    Type: Grant
    Filed: September 24, 2018
    Date of Patent: November 12, 2019
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Materials Co., Ltd.
    Inventors: Yukihiro Fukuta, Yoshitaka Adachi, Nobuaki Nakashima, Koichi Nittoh
  • Publication number: 20190025230
    Abstract: A neutron grid, comprises: a grid including: a plurality of spacers through which at least a part of first neutrons from a target passes; and a plurality of absorbers to absorb at least a part of second neutrons scattered thorough the target, the spacers and the absorbers being alternately arranged along a first direction and extending along a second direction intersecting with the first direction; and a pair of covers through which at least a part of the first neutrons and at least a part of the second neutrons pass, sandwiching the grid along a third direction intersecting with the first and second directions. A thermal expansion coefficient difference between one of the spacers and one of the absorbers is ±9×10?6/° C. or less, or Young's modulus of the spacer is 100 GPa or more.
    Type: Application
    Filed: September 24, 2018
    Publication date: January 24, 2019
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MATERIALS CO., LTD.
    Inventors: Yukihiro Fukuta, Yoshitaka Adachi, Nobuaki Nakashima, Koichi Nittoh
  • Publication number: 20180196146
    Abstract: There is provided a scintillator array to be used for a neutron detector capable of detecting high energy neutrons with high definition and high efficiency. A scintillator array comprises a structure including a plurality of stacks layered each other. Each of the stacks has in sequence: a light reflector including ceramics or single-crystal silicon; a first film to react with a neutron incident along a direction intersecting a lamination direction of the stacks and thus emit a radiation ray; a second film including a material to reflect light; and a scintillator to emit light in response to the radiation ray. The light from the scintillator is reflected by the reflector and the second film to propagate an inside of the scintillator and thus to be led to an outside of the structure.
    Type: Application
    Filed: February 28, 2018
    Publication date: July 12, 2018
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MATERIALS CO., LTD.
    Inventors: Yukihiro FUKUTA, Yoshitaka ADACHI, Nobuaki NAKASHIMA, Koichi NITTOH
  • Patent number: 8363781
    Abstract: A nondestructive identification device includes: a radiation source 1 irradiating an x-ray 2 to a standard sample 5 made of a known material and a sample 3; a sensor 4 detecting a radiation ray having transmitted the standard sample 5 and the sample 3; a signal processing device 7 converting a signal of the sensor 4 into an image; an image processing device 8 which performs adjustment on an entire second image to make a luminance value of a part of the standard sample 5 in the obtained image or a relation between the luminance value and a thickness of the standard sample 5 in a first image where the energy of the radiation source 1 is first energy be the same as that in the second image where the energy of the radiation source 1 is second energy, and which performs a computation processing to take a difference or a ratio between the adjusted second image and the first image; and a display device 9 displaying an image.
    Type: Grant
    Filed: April 23, 2008
    Date of Patent: January 29, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masayo Kato, Koichi Nittoh, Hitoshi Sakai, Chikara Konagai, Katsumi Hosaka
  • Publication number: 20100119037
    Abstract: A nondestructive identification device includes: a radiation source 1 irradiating an x-ray 2 to a standard sample 5 made of a known material and a sample 3; a sensor 4 detecting a radiation ray having transmitted the standard sample 5 and the sample 3; a signal processing device 7 converting a signal of the sensor 4 into an image; an image processing device 8 which performs adjustment on an entire second image to make a luminance value of a part of the standard sample 5 in the obtained image or a relation between the luminance value and a thickness of the standard sample 5 in a first image where the energy of the radiation source 1 is first energy be the same as that in the second image where the energy of the radiation source 1 is second energy, and which performs a computation processing to take a difference or a ratio between the adjusted second image and the first image; and a display device 9 displaying an image.
    Type: Application
    Filed: April 23, 2008
    Publication date: May 13, 2010
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Masayo Kato, Koichi Nittoh, Hitoshi Sakai, Chikara Konagai, Katsumi Hosaka
  • Publication number: 20100116993
    Abstract: A neutron reactant layer (220) is directly coated inside an aluminum substrate (200) of an incident window (20). A first scintillator layer (201) is formed inside the neutron reactant layer 220, and a photoelectric conversion layer (202) is formed inside the first scintillator layer (201). A neutron reactant layer (210) is composed of enriched boron carbide (10B4C), and generates ?-rays from neutrons by a (n, ?) reaction in enriched boron. The first scintillator layer (201) is light-emitted by this ?-rays.
    Type: Application
    Filed: April 24, 2008
    Publication date: May 13, 2010
    Inventors: Koichi Nittoh, Kiyoharu Tsunokawa, Chikara Konagai
  • Publication number: 20090032718
    Abstract: A color scintillator 26 comprises: an optical substrate having bundled optical fibers; an acicular scintillator 50 provided with the optical substrate 30, the acicular scintillator having either of an acicular crystal structure and a columnar crystal structure, the acicular scintillator reacting with at least one of an electromagnetic wave and a radial ray into light emitting; and a coating scintillator 51 coating the acicular scintillator 50, the coating scintillator reacting with at least one of another electromagnetic wave and another radial ray which differ in either of an energy and a type from the electromagnetic wave and the radial ray reacting with the acicular scintillator 50 into light emitting in a different color from an emitting color in the acicular scintillator 50.
    Type: Application
    Filed: September 24, 2008
    Publication date: February 5, 2009
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Koichi NITTOH, Kunihiko Nakayama, Keisuke Kitsukawa, Motohisa Abe, Takashi Noji
  • Publication number: 20070069141
    Abstract: A color scintillator 26 comprises: an optical substrate 30 having bundled optical fibers; an acicular scintillator 50 provided with the optical substrate 30, the acicular scintillator having either of an acicular crystal structure and a columnar crystal structure, the acicular scintillator reacting with at least one of an electromagnetic wave and a radial ray into light emitting; and a coating scintillator 51 coating the acicular scintillator 50, the coating scintillator reacting with at least one of another electromagnetic wave and another radial ray which differ in either of an energy and a type from the electromagnetic wave and the radial ray reacting with the acicular scintillator 50 into light emitting in a different color from an emitting color in the acicular scintillator 50.
    Type: Application
    Filed: September 29, 2004
    Publication date: March 29, 2007
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Koichi Nittoh, Kunihiko Nakayama, Keisuke Kitsukawa, Motohisa Abe, Takashi Noji
  • Patent number: 7053382
    Abstract: An object of the present invention is to provide an X-ray image tube which enables acquisition of an image of a proper density by increasing contrast without increasing an irradiation dose of X-rays. The X-rays absorbed or scattered through a subject emit light on an input surface formed in an input window, and the light is further converted into electrons on a photoelectric surface which converts the light into the electrons, accelerated and focused by a focusing electrode, and then guided to an anode side. The electrons guided to the anode side are made visible by a fluorescent substance, and an image of a color is projected on a glass plate with a luminance and a color based on a distribution of the incident X-rays in accordance with the dose of the X-rays.
    Type: Grant
    Filed: March 9, 2004
    Date of Patent: May 30, 2006
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takashi Noji, Koichi Nittoh, Chikara Konagai
  • Publication number: 20040208281
    Abstract: An object of the present invention is to provide an X-ray image tube which enables acquisition of an image of a proper density by increasing contrast without increasing an irradiation dose of X-rays. The X-rays absorbed or scattered through a subject emit light on an input surface formed in an input window, and the light is further converted into electrons on a photoelectric surface which converts the light into the electrons, accelerated and focused by a focusing electrode, and then guided to an anode side. The electrons guided to the anode side are made visible by a fluorescent substance, and an image of a color is projected on a glass plate with a luminance and a color based on a distribution of the incident X-rays in accordance with the dose of the X-rays.
    Type: Application
    Filed: March 9, 2004
    Publication date: October 21, 2004
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Takashi Noji, Koichi Nittoh, Chikara Konagai
  • Patent number: 6392248
    Abstract: A color radiography system comprises a color light emission sheet having a phosphor layer that contains a phosphor emitting in a plurality of colors to radiation and emits light under irradiation of radiation transmitted through a subject to be inspected, and a color film or a color camera that detects the light emissions of the plurality of colors into the respective colors. In the phosphor layer, a phosphor is used that has a primary emission component corresponding to one emission color in a visible light region and at least one secondary emission component, the secondary emission component having an emission color different from that of the primary emission component and a ratio of light emission to radiation of the same intensity being different from that of the primary emission component. According to the present color radiography system, image information of a plurality of colors having different sensitivity characteristics can be obtained.
    Type: Grant
    Filed: November 3, 2000
    Date of Patent: May 21, 2002
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takeshi Takahara, Akihisa Saito, Eiji Oyaizu, Koichi Nittoh, Toshiyuki Tamura
  • Patent number: 6313465
    Abstract: A radiation discriminative measurement is performed by using a radiation discriminative measuring apparatus which comprises a radiation source for radiating radiations, first, second and third scintillators disposed in a region which is irradiated with the radiations radiated from the radiation source, and an image pickup means to deal with the light beams emitted from the first, second and third scintillators and the discrimination measurement includes the steps of arranging the first, second and third scintillators in a region which is irradiated with the radiations radiated from the radiation source, causing the first scintillator to respond to type A, type B and type C radiations radiated from the radiation source and to emit alight beam in a first wavelength region, causing the second scintillator to respond to type B and type C radiations which pass through the first scintillator so as to to emit a light beam in a second wavelength region, and causing the third scintillator to respond to a type C radiat
    Type: Grant
    Filed: January 29, 1999
    Date of Patent: November 6, 2001
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Koichi Nittoh, Takeshi Takahara, Yukihiro Fukuta, Chikara Konagai
  • Patent number: 5524033
    Abstract: Gadolinium is provided which is adapted for nuclear fuel as a burnable poison, having a plurality of isotopes in an isotopic composition such that the content of at least one even mass numbered isotope is smaller than the content of the same isotope in natural gadolinium. A fuel assembly is also provided having a plurality of nuclear fuel rods arrayed as a lattice in which at least one of the fuel rods contains the gadolinium burnable poison of the present invention. Also, a fuel assembly is described which has a plurality of nuclear fuel rods arrayed as a lattice which includes at least a first group and a second group of nuclear fuel rods containing gadolinium. The content of Gd-157 in the gadolinium is larger than that found in natural gadolinium. Further, the gadolinium concentrations in the first and second groups are different from each other.
    Type: Grant
    Filed: May 18, 1994
    Date of Patent: June 4, 1996
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kazuki Hida, Tadashi Ikehara, Koichi Nittoh