Patents Assigned to TSUBOTA LABORATORY, INC.
  • Publication number: 20180351050
    Abstract: A light source for myopia prevention article includes a light emitter to emit light having an emission spectrum continuing from a first wavelength of not less than 360 nm nor more than 400 nm to a second wavelength of more than 400 nm.
    Type: Application
    Filed: July 25, 2018
    Publication date: December 6, 2018
    Applicants: TOSHIBA MATERIALS CO., LTD., TSUBOTA LABORATORY, INC.
    Inventors: Masahiko Yamakawa, Hidemasa Torii, Toshihide Kurihara, Kazuo Tsubota
  • Publication number: 20180341122
    Abstract: An optical element has a transmission spectrum characterized in that a local maximum falls within a wavelength region longer than 315 nm but shorter than or equal to 400 nm, a local minimum falls within a wavelength region longer than or equal to 380 nm but shorter than or equal to 500 nm, and the wavelength at the local maximum is shorter than the wavelength at the local minimum.
    Type: Application
    Filed: November 25, 2015
    Publication date: November 29, 2018
    Applicants: JINS INC., Tsubota Laboratory, Inc.
    Inventors: Shunsuke Shioya, Kazuo Tsubota, Toshihide Kurihara, Hidemasa Toril
  • Patent number: 10133092
    Abstract: The purpose of the present invention is to provide a myopia prevention device. A myopia prevention device of the present invention comprises a light transmission part selected from a group consisting of an eyesight correcting tool, an eye protection tool, a face protection tool, a sunshade, a display device, a window, a wall, a light source covering, and a coating material. The light transmission part of the device transmits light having a wavelength within a range of 350 nm to 400 nm inclusive and thus suppresses the occurrence and progression of myopia. Further, a myopia prevention device comprises a light emission part selected from a group consisting of lighting equipment, a display device, and a light irradiation device. The light emission part of the device emits light having a wavelength within a range of 350 nm to 400 nm inclusive and thus suppresses the occurrence and progression of myopia.
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: November 20, 2018
    Assignee: TSUBOTA LABORATORY, INC.
    Inventors: Kazuo Tsubota, Kazuno Negishi, Hidemasa Torii, Toshihide Kurihara
  • Publication number: 20180297888
    Abstract: A wavelength-selective transmissive glass has a light transmittance Tmore than 315 nm and 400 nm or less at a wavelength of more than 315 nm and 400 nm or less represented by the formula shown below of 1% or more in terms of a plate thickness of 6 mm and a light transmittance T315 nm or less at a wavelength of 315 nm or less represented by the formula shown below of 60% or less in terms of a plate thickness of 6 mm. Ak is a weighting factor at a wavelength k (nm) for calculating T (light transmittance) defined in ISO-9050:2003, and Tk is a transmittance at the wavelength k (nm) in terms of a plate thickness of 6 mm: Tmore than 315 nm and 400 nm or less=(?k=more than 315400 Ak×Tk)/(?k=more than 315400 Ak) T315 nm or less=(?k=300315 Ak×Tk)/(?k=300315 Ak).
    Type: Application
    Filed: June 1, 2018
    Publication date: October 18, 2018
    Applicants: ASAHI GLASS COMPANY, LIMITED, TSUBOTA LABORATORY, INC.
    Inventors: Kensuke NAGAI, Tetsuya NAKASHIMA, Yutaka KUROIWA, Hiroyuki HIJIYA, Masamichi TANIDA, AKIO KOIKE, Manabu NISHIZAWA, Kazuo TSUBOTA, Toshihide KURIHARA, Hidemasa TORII
  • Publication number: 20180280718
    Abstract: To provide an irradiation device capable of preventing myopia or slowing the progression of myopia by the action of light irradiated toward the eyeball. An irradiation device (10) comprises a light source (1) and an instrument (2) on which the light source (1) is mounted. The light source (1) emits at least light having a wavelength within a range of 350 to 400 nm, inclusive, and is disposed in a position that allows irradiation in an eyeball direction when the instrument (2) is mounted. Further, the light source (1) is disposed in a position 0 to 100 mm, inclusive, from a surface of the eyeball. At this time, an irradiance of the light having a wavelength within the range of 350 to 400 nm, inclusive, is 0.02 to 1.0 W/m2, inclusive, on the eyeball surface when the instrument (2) is worn.
    Type: Application
    Filed: June 4, 2018
    Publication date: October 4, 2018
    Applicant: TSUBOTA LABORATORY, INC.
    Inventors: Kazuo TSUBOTA, Kazuno Negishi, Hidemasa Torii, Toshihide Kurihara
  • Publication number: 20180273424
    Abstract: A wavelength-selective transmissive glass article has light transmittance Tmore than 315 nm and 400 nm or less at a wavelength of more than 315 nm and 400 nm or less of 1% or more. In addition, the wavelength-selective transmissive glass article has light transmittance T315 nm or less at a wavelength of 315 nm or less of 60% or less.
    Type: Application
    Filed: May 30, 2018
    Publication date: September 27, 2018
    Applicants: ASAHI GLASS COMPANY, LIMITED, TSUBOTA LABORATORY, INC.
    Inventors: Hideyuki Hirakoso, Takahiro Mashimo, Kensuke Nagai, Kazuo Tsubota, Toshihide Kurihara, Hidemasa Torii