Patents by Inventor Tomo Sato

Tomo Sato 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: 20250110266
    Abstract: A light modulation element reproduces a light image in a specific color other than iridescence where white light is incident, without a layer that selectively transmits or reflects a specific wavelength band, and clearly reproduces a desired light image by reducing an influence of 0th-order diffracted light, and an information recording medium including the same. The light modulation element includes a factor element that reproduces a light image by modulating a phase of incident reproduction light, and has an uneven surface. A maximum diffraction efficiency Dmax in a wavelength band of between 380 nm and 780 nm in wavelength distribution of first-order diffracted light and of negative first-order diffracted light with respect to diffraction efficiency for the factor element has a local maximum value with a full width at half maximum FWHM of 200 nm or less in wavelength distribution with respect to diffraction efficiency having the maximum diffraction efficiency.
    Type: Application
    Filed: December 12, 2024
    Publication date: April 3, 2025
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Tsuyoshi YAMAUCHI, Mitsuru Kitamura, Tomoe Sato
  • Patent number: 12189163
    Abstract: A light modulation element reproduces a light image in a specific color other than iridescence where white light is incident, without a layer that selectively transmits or reflects a specific wavelength band, and clearly reproduces a desired light image by reducing an influence of 0th-order diffracted light, and an information recording medium including the same. The light modulation element includes a factor element that reproduces a light image by modulating a phase of incident reproduction light, and has an uneven surface. A maximum diffraction efficiency Dmax in a wavelength band of between 380 nm and 780 nm in wavelength distribution of first-order diffracted light and of negative first-order diffracted light with respect to diffraction efficiency for the factor element has a local maximum value with a full width at half maximum FWHM of 200 nm or less in wavelength distribution with respect to diffraction efficiency having the maximum diffraction efficiency.
    Type: Grant
    Filed: September 7, 2018
    Date of Patent: January 7, 2025
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Tsuyoshi Yamauchi, Mitsuru Kitamura, Tomoe Sato
  • Publication number: 20240418924
    Abstract: A light modulation element reproduces a light image in a specific color other than iridescence where white light is incident, without a layer that selectively transmits or reflects a specific wavelength band, and clearly reproduces a desired light image by reducing an influence of 0th-order diffracted light, and an information recording medium including the same. The light modulation element includes a factor element that reproduces a light image by modulating a phase of incident reproduction light, and has an uneven surface. A maximum diffraction efficiency Dmax in a wavelength band of between 380 nm and 780 nm in wavelength distribution of first-order diffracted light and of negative first-order diffracted light with respect to diffraction efficiency for the factor element has a local maximum value with a full width at half maximum FWHM of 200 nm or less in wavelength distribution with respect to diffraction efficiency having the maximum diffraction efficiency.
    Type: Application
    Filed: August 26, 2024
    Publication date: December 19, 2024
    Applicant: Dai Nippon Printing Co., Ltd.
    Inventors: Tsuyoshi YAMAUCHI, Mitsuru KITAMURA, Tomoe SATO
  • Patent number: 12087340
    Abstract: A magnetic recording medium is a tape-shaped magnetic recording medium that has a recording layer including an ?-iron oxide particle. An area ratio Rlow (=(Slow/Stotal)×100) of a total area Stotal of an SFD curve of the recording layer in a perpendicular direction and an area Slow of the SFD curve in which a coercivity Hc is in a range from ?500 [Oe]?Hc?500 [Oe] is equal to or less than 5.5%.
    Type: Grant
    Filed: September 4, 2020
    Date of Patent: September 10, 2024
    Assignee: Sony Group Corporation
    Inventors: Natsuki Ichise, Minoru Yamaga, Katsunori Maeshima, Masaru Terakawa, Takeshi Takahashi, Tomoe Sato, Takashi Kataguchi
  • Publication number: 20230075546
    Abstract: Provided is a magnetic recording medium that is able to achieve both an improvement in electromagnetic conversion characteristics and ensuring of high long-term reliability. The magnetic recording medium includes a magnetic layer and a base. The magnetic layer includes magnetic powders including ?-iron oxide. A ratio (Hrp/Hc) of residual coercivity (Hrp) measured in a perpendicular direction of the magnetic recording medium with use of a pulse magnetic field to perpendicular coercivity (Hc) of the magnetic recording medium is 2.0 or less. Saturation magnetization (Mst) per unit area of the magnetic recording medium is 4.5 mA or greater.
    Type: Application
    Filed: January 20, 2021
    Publication date: March 9, 2023
    Inventors: Takeshi TAKAHASHI, Katsunori MAESHIMA, Minoru YAMAGA, Masaru TERAKAWA, Natsuki ICHISE, Tomoe SATO, Takashi KATAGUCHI, Atsuya TOWATA, Kimihiro OZAKI, Akihiro MATSUMOTO
  • Publication number: 20220392488
    Abstract: A magnetic recording medium is a tape-shaped magnetic recording medium that has a recording layer including an ?-iron oxide particle. An area ratio Rlow (=(Slow/Stotal)×100) of a total area Stotal of an SFD curve of the recording layer in a perpendicular direction and an area Slow of the SFD curve in which a coercivity Hc is in a range from ?500 [Oe]?Hc?500 [Oe] is equal to or less than 5.5%.
    Type: Application
    Filed: September 4, 2020
    Publication date: December 8, 2022
    Inventors: Natsuki ICHISE, Minoru YAMAGA, Katsunori MAESHIMA, Masaru TERAKAWA, Takeshi TAKAHASHI, Tomoe SATO, Takashi KATAGUCHI
  • Patent number: 11505111
    Abstract: An illumination apparatus that illuminates an illumination zone having a first direction and a second direction crossing the first direction is provided with a light source to emit a coherent light beam, and a diffraction optical device to diffract the coherent light beam incident from the light source. The diffraction optical device diffracts the incident coherent light beam so that a width of the illumination zone in the second direction gradually becomes wider along the first direction of the illumination zone from a nearer side to the diffraction optical device.
    Type: Grant
    Filed: October 18, 2021
    Date of Patent: November 22, 2022
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Shumpei Nishio, Makio Kurashige, Kaori Nakatsugawa, Tomoe Sato
  • Patent number: 11447065
    Abstract: An illumination device has a coherent light source that emits coherent light beam, and an optical device that diffuses the coherent light beam, wherein the optical device comprises a first diffusion region that diffuses the coherent light beam to illuminate a first area, and a second diffusion region that diffuses the coherent light beam to display predetermined information in a second area.
    Type: Grant
    Filed: January 28, 2020
    Date of Patent: September 20, 2022
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Makio Kurashige, Tomoe Sato, Kazutoshi Ishida
  • Publication number: 20220185939
    Abstract: The present invention aims to provide a polyol composition capable of producing a flexible polyurethane foam having excellent low resilience at room temperature and good breathability. The present invention provides a polyol composition (C) for producing flexible polyurethane foam, containing a polyester polyol (A) and a polyether polyol (B), wherein the followings (1) to (4) are satisfied: (1) the polyol composition (C) has an ester group concentration of 0.4 to 4.
    Type: Application
    Filed: February 20, 2020
    Publication date: June 16, 2022
    Applicant: SANYO CHEMICAL INDUSTRIES, LTD.
    Inventors: Takuma TAHARA, Tomohisa HIRANO, Tomo SATO
  • Patent number: 11355145
    Abstract: The magnetic recording medium includes a long substrate body, and a magnetic layer including a powder of cubic crystal ferrite magnetic particles. The sum of a squareness ratio in the longitudinal direction and a squareness ratio in the vertical direction is 1.2 or more, and the difference of the squareness ratio in the longitudinal direction and the squareness ratio in the vertical direction is 0.15 or more.
    Type: Grant
    Filed: December 14, 2016
    Date of Patent: June 7, 2022
    Assignee: Sony Corporation
    Inventors: Eiji Nakashio, Masaru Terakawa, Yoichi Kanemaki, Tomoe Sato, Katsunori Maeshima, Nobuyuki Sasaki
  • Publication number: 20220032836
    Abstract: An illumination apparatus that illuminates an illumination zone having a first direction and a second direction crossing the first direction is provided with a light source to emit a coherent light beam, and a diffraction optical device to diffract the coherent light beam incident from the light source. The diffraction optical device diffracts the incident coherent light beam so that a width of the illumination zone in the second direction gradually becomes wider along the first direction of the illumination zone from a nearer side to the diffraction optical device.
    Type: Application
    Filed: October 18, 2021
    Publication date: February 3, 2022
    Applicant: Dai Nippon Printing Co., Ltd.
    Inventors: Shumpei NISHIO, Makio KURASHIGE, Kaori NAKATSUGAWA, Tomoe SATO
  • Publication number: 20210405274
    Abstract: A light modulation element reproduces a light image in a specific color other than iridescence where white light is incident, without a layer that selectively transmits or reflects a specific wavelength band, and clearly reproduces a desired light image by reducing an influence of 0th-order diffracted light, and an information recording medium including the same. The light modulation element includes a factor element that reproduces a light image by modulating a phase of incident reproduction light, and has an uneven surface. A maximum diffraction efficiency Dmax in a wavelength band of between 380 nm and 780 nm in wavelength distribution of first-order diffracted light and of negative first-order diffracted light with respect to diffraction efficiency for the factor element has a local maximum value with a full width at half maximum FWHM of 200 nm or less in wavelength distribution with respect to diffraction efficiency having the maximum diffraction efficiency.
    Type: Application
    Filed: September 7, 2018
    Publication date: December 30, 2021
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Tsuyoshi YAMAUCHI, Mitsuru KITAMURA, Tomoe SATO
  • Patent number: 11186219
    Abstract: An illumination apparatus that illuminates an illumination zone having a first direction and a second direction crossing the first direction is provided with a light source to emit a coherent light beam, and a diffraction optical device to diffract the coherent light beam incident from the light source. The diffraction optical device diffracts the incident coherent light beam so that a width of the illumination zone in the second direction gradually becomes wider along the first direction of the illumination zone from a nearer side to the diffraction optical device.
    Type: Grant
    Filed: August 11, 2020
    Date of Patent: November 30, 2021
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Shumpei Nishio, Makio Kurashige, Kaori Nakatsugawa, Tomoe Sato
  • Patent number: 10872633
    Abstract: A magnetic recording medium according to a first technique includes an elongated substrate having a first surface and a second surface, a first reinforcing layer disposed on the first surface, a second reinforcing layer disposed on the second surface, an adhesion suppressing layer disposed on the second reinforcing layer, and a recording layer disposed on the first reinforcing layer or the adhesion suppressing layer.
    Type: Grant
    Filed: May 11, 2017
    Date of Patent: December 22, 2020
    Assignee: Sony Corporation
    Inventors: Eiji Nakashio, Yuta Akimoto, Tomoe Sato, Yoichi Kanemaki, Nobuyuki Sasaki, Masaru Terakawa, Kazuya Hashimoto, Katsunori Maeshima, Minoru Yamaga, Hikaru Terui, Hiroyuki Kobayashi
  • Publication number: 20200369199
    Abstract: An illumination apparatus that illuminates an illumination zone having a first direction and a second direction crossing the first direction is provided with a light source to emit a coherent light beam, and a diffraction optical device to diffract the coherent light beam incident from the light source. The diffraction optical device diffracts the incident coherent light beam so that a width of the illumination zone in the second direction gradually becomes wider along the first direction of the illumination zone from a nearer side to the diffraction optical device.
    Type: Application
    Filed: August 11, 2020
    Publication date: November 26, 2020
    Applicant: Dai Nippon Printing Co., Ltd.
    Inventors: Shumpei NISHIO, Makio KURASHIGE, Kaori NAKATSUGAWA, Tomoe SATO
  • Publication number: 20200321025
    Abstract: A magnetic recording medium includes an elongated substrate, and a reinforcing layer and a carbon thin film disposed on one surface of the substrate.
    Type: Application
    Filed: May 11, 2017
    Publication date: October 8, 2020
    Applicant: Sony Corporation
    Inventors: Eiji NAKASHIO, Yuta AKIMOTO, Tomoe SATO, Yoichi KANEMAKI, Nobuyuki SASAKI, Masaru TERAKAWA, Kazuya HASHIMOTO, Katsunori MAESHIMA, Minoru YAMAGA, Hikaru TERUI, Hiroyuki KOBAYASHI
  • Patent number: 10773636
    Abstract: An illumination apparatus that illuminates an illumination zone having a first direction and a second direction crossing the first direction is provided with a light source to emit a coherent light beam, and a diffraction optical device to diffract the coherent light beam incident from the light source. The diffraction optical device diffracts the incident coherent light beam so that a width of the illumination zone in the second direction gradually becomes wider along the first direction of the illumination zone from a nearer side to the diffraction optical device.
    Type: Grant
    Filed: June 13, 2017
    Date of Patent: September 15, 2020
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Shumpei Nishio, Makio Kurashige, Kaori Nakatsugawa, Tomoe Sato
  • Publication number: 20200156531
    Abstract: An illumination device has a coherent light source that emits coherent light beam, and an optical device that diffuses the coherent light beam, wherein the optical device comprises a first diffusion region that diffuses the coherent light beam to illuminate a first area, and a second diffusion region that diffuses the coherent light beam to display predetermined information in a second area.
    Type: Application
    Filed: January 28, 2020
    Publication date: May 21, 2020
    Applicant: Dai Nippon Printing Co., Ltd.
    Inventors: Makio KURASHIGE, Tomoe Sato, Kazutoshi Ishida
  • Patent number: 10656597
    Abstract: To provide an authentication device and method for a security medium including a reflective volume hologram having a light source disposed on the front surface side of the reflective volume hologram so that light emitted therefrom is incident on the reflective volume hologram, a first observation device disposed in a pre-designed diffraction direction of the reflective volume hologram, and a second observation device disposed in a direction other than the pre-designed diffraction direction of the reflective volume hologram. Light including a pre-designed diffraction wavelength is emitted from the light source to be incident on the reflective volume hologram, and when the light amount observed in the first observation device is larger in the diffraction wavelength than in other wavelengths, and the light amount observed in the second observation device is smaller in the diffraction wavelength than in other wavelengths, it is determined that the reflective volume hologram is genuine.
    Type: Grant
    Filed: September 7, 2015
    Date of Patent: May 19, 2020
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Mitsuru Kitamura, Tsuyoshi Yamauchi, Koji Eto, Nobuko Oikawa, Tomoe Sato
  • Patent number: 10576874
    Abstract: An illumination device is provided, including a coherent light source that emits coherent light beam and an optical device that diffuses the coherent light beam. The optical device includes a first diffusion region that diffuses the coherent light beam to illuminate a first area, and a second diffusion region that diffuses the coherent light beam to display predetermined information in a second area. A timing control unit individually controls a light emission timing at which the coherent light source emits the coherent light so that the coherent light is irradiated to the first diffusion region and the second diffusion region, an incident timing at which the coherent light from the coherent light source is incident on the first diffusion region and the second diffusion region, or an illumination timing at which the coherent light diffused by the optical device illuminates the first area and the second area.
    Type: Grant
    Filed: November 6, 2015
    Date of Patent: March 3, 2020
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Makio Kurashige, Tomoe Sato, Kazutoshi Ishida