Patents by Inventor Reiko Kubota

Reiko Kubota 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: 20190353827
    Abstract: An article includes a film on a surface thereof, the film containing a resin, an organic azo-based particle, and a Ti- and O-containing particle so that the film is not separated or cracked and has a good design and good heat-shielding properties.
    Type: Application
    Filed: May 15, 2019
    Publication date: November 21, 2019
    Inventors: Reiko Kubota, Yoji Teramoto, Shuhei Yamamoto
  • Publication number: 20190169462
    Abstract: A light-shielding paint includes an epoxy group-containing compound, an inorganic fine particle, a coloring agent, and an amine curing agent. The ratio (A?/A) of the mass (A?) of the amine curing agent to the active hydrogen equivalent (A) of the amine curing agent and the ratio (E?/E) of the mass (E?) of the epoxy group-containing compound to the epoxy equivalent (E) of the epoxy group-containing compound satisfy 0.1?[(A?/A)/(E?/E)]?0.45.
    Type: Application
    Filed: February 1, 2019
    Publication date: June 6, 2019
    Inventors: Reiko Kubota, Yoji Teramoto, Shuhei Yamamoto
  • Patent number: 10240063
    Abstract: A light-shielding paint includes an epoxy group-containing compound, an inorganic fine particle, a coloring agent, and an amine curing agent. The ratio (A?/A) of the mass (A?) of the amine curing agent to the active hydrogen equivalent (A) of the amine curing agent and the ratio (E?/E) of the mass (E?) of the epoxy group-containing compound to the epoxy equivalent (E) of the epoxy group-containing compound satisfy 0.1?[(A?/A)/(E?/E)]?0.45.
    Type: Grant
    Filed: August 4, 2015
    Date of Patent: March 26, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Reiko Kubota, Yoji Teramoto, Shuhei Yamamoto
  • Publication number: 20180329120
    Abstract: A light-shielding film for optical element includes at least a resin and a colorant. The light-shielding film for optical element has an average extinction coefficient of 0.03 or more and 0.15 or less as an average of extinction coefficients of the whole light-shielding film for light having wavelengths ranging from 400 to 700 nm.
    Type: Application
    Filed: July 9, 2018
    Publication date: November 15, 2018
    Inventor: Reiko Kubota
  • Patent number: 10126550
    Abstract: An optical element includes a substrate and a light-shielding film on a part of the periphery of the substrate. The light-shielding film contains a compound having an epoxy group, a coloring agent, inorganic particles having a refractive index of 2.2 or more, and silica particles. The average concentration of the inorganic particles in an interface region having a thickness of 15 nm from the interface between the substrate and the light-shielding film is 1.1 to 1.5 times as high as the average concentration of the inorganic particles in the light-shielding film.
    Type: Grant
    Filed: February 4, 2016
    Date of Patent: November 13, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoji Teramoto, Shuhei Yamamoto, Reiko Kubota
  • Publication number: 20180298210
    Abstract: There is provided an optical apparatus which comprises a lens, and a lens barrel holding the lens, wherein a film is formed on a surface of the lens barrel, the film contains a resin, titanium oxide coated with silica, and an inorganic particle, an average particle size of the inorganic particle is 10 nm or more and 110 nm or less, and an average particle size of the titanium oxide coated with the silica is 0.2 ?m or more. Thus, it is possible to achieve the optical apparatus which, in an anoxic atmosphere, has less discoloration due to sunlight and less reflectance deterioration even when color is thin, and has the high solar reflectance.
    Type: Application
    Filed: April 2, 2018
    Publication date: October 18, 2018
    Inventors: Reiko Kubota, Yoji Teramoto
  • Patent number: 10048410
    Abstract: A light-shielding film for optical element includes at least a resin and a colorant. The light-shielding film for optical element has an average extinction coefficient of 0.03 or more and 0.15 or less as an average of extinction coefficients of the whole light-shielding film for light having wavelengths ranging from 400 to 700 nm.
    Type: Grant
    Filed: January 14, 2015
    Date of Patent: August 14, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventor: Reiko Kubota
  • Patent number: 9809714
    Abstract: An antireflection coating film for an optical element is provided on a surface of a substrate of an optical material and includes first particles having a refractive index (nd) of at least 2.2 or more for the d-line and an average particle size of 10 to 70 nm, second particles of at least one of silica and sericite and having an average particle size of 1 to 11 ?m, a colorant of an organic substance and soluble in an organic solvent, and a resin, in which the first particle content is in the range of 10% to 35% by weight, and second particle content is in the range of 1% to 11% by weight. The antireflection coating film has a high effect of preventing surface reflection, a high effect of preventing inner-surface reflection, satisfactory absorption of visible light, and low levels of reflection and scattering in the film.
    Type: Grant
    Filed: July 2, 2014
    Date of Patent: November 7, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventor: Reiko Kubota
  • Publication number: 20170299840
    Abstract: Provided is a thermal barrier film having, dispersed in a resin matrix, high-refractive-index particles having a D-line refractive index of 2.5 or more and 3.2 or less. The high-refractive-index particles have an average particle size of 2.0 ?m or more and 5.0 ?m or less. Provided are a thermal barrier film that reduces a temperature rise due to sunlight by virtue of having a high reflectance even as a thin film, has high film thickness accuracy, and has high abrasion resistance, a thermal barrier paint for forming such thermal barrier film, and an optical instrument including such thermal barrier film.
    Type: Application
    Filed: April 7, 2017
    Publication date: October 19, 2017
    Inventors: Reiko Kubota, Toshiaki Shingu
  • Publication number: 20160363701
    Abstract: A light-shielding film for optical element includes at least a resin and a colorant. The light-shielding film for optical element has an average extinction coefficient of 0.03 or more and 0.15 or less as an average of extinction coefficients of the whole light-shielding film for light having wavelengths ranging from 400 to 700 nm.
    Type: Application
    Filed: January 14, 2015
    Publication date: December 15, 2016
    Inventor: Reiko Kubota
  • Publication number: 20160282612
    Abstract: Provided is an optical element including a substrate and a light-shielding film in a part of the substrate. The light-shielding film contains a resin and a colorant. The resin is a cured epoxy resin having a first aryl unit represented by Formula (1) below in a side chain or a terminal. [In the formula, Ar represents a monocyclic unsubstituted aryl group, a polycyclic unsubstituted aryl group, a monocyclic substituted aryl group, or a polycyclic substituted aryl group.
    Type: Application
    Filed: March 1, 2016
    Publication date: September 29, 2016
    Inventors: Ryo Ogawa, Keiichiro Tsubaki, Tetsuo Hino, Reiko Kubota
  • Publication number: 20160231563
    Abstract: An optical element includes a substrate and a light-shielding film on a part of the periphery of the substrate. The light-shielding film contains a compound having an epoxy group, a coloring agent, inorganic particles having a refractive index of 2.2 or more, and silica particles. The average concentration of the inorganic particles in an interface region having a thickness of 15 nm from the interface between the substrate and the light-shielding film is 1.1 to 1.5 times as high as the average concentration of the inorganic particles in the light-shielding film.
    Type: Application
    Filed: February 4, 2016
    Publication date: August 11, 2016
    Inventors: Yoji Teramoto, Shuhei Yamamoto, Reiko Kubota
  • Publication number: 20160040031
    Abstract: A light-shielding paint includes an epoxy group-containing compound, an inorganic fine particle, a coloring agent, and an amine curing agent. The ratio (A?/A) of the mass (A?) of the amine curing agent to the active hydrogen equivalent (A) of the amine curing agent and the ratio (E?/E) of the mass (E?) of the epoxy group-containing compound to the epoxy equivalent (E) of the epoxy group-containing compound satisfy 0.1?[(A?/A)/(E?/E)]?0.45.
    Type: Application
    Filed: August 4, 2015
    Publication date: February 11, 2016
    Inventors: Reiko Kubota, Yoji Teramoto, Shuhei Yamamoto
  • Publication number: 20160024335
    Abstract: An optical element has a lanthanum-containing glass substrate and a light-shielding film on part of the surface of the glass substrate. The light-shielding film is made from a light-shielding paint that contains at least an epoxy resin, fine particles of titania, a dye, an organic solvent, and an amine-based curing agent. The organic solvent in the light-shielding paint has a vapor pressure of 160 Pa or more and 960 Pa or less at a temperature of 20° C. The viscosity of the light-shielding paint is 10.0 mPa·s or more and 100 mPa·s or less.
    Type: Application
    Filed: July 24, 2015
    Publication date: January 28, 2016
    Inventors: Shuhei Yamamoto, Yoji Teramoto, Reiko Kubota
  • Publication number: 20150125689
    Abstract: A light-shielding film for optical element includes at least a resin and a colorant. The light-shielding film for optical element has an average extinction coefficient of 0.03 or more and 0.15 or less as an average of extinction coefficients of the whole light-shielding film for light having wavelengths ranging from 400 to 700 nm.
    Type: Application
    Filed: January 14, 2015
    Publication date: May 7, 2015
    Inventor: Reiko Kubota
  • Patent number: 8958155
    Abstract: A light-shielding film for optical element includes at least a resin and a colorant. The light-shielding film for optical element has an average extinction coefficient of 0.03 or more and 0.15 or less as an average of extinction coefficients of the whole light-shielding film for light having wavelengths ranging from 400 to 700 nm.
    Type: Grant
    Filed: February 11, 2011
    Date of Patent: February 17, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Reiko Kubota
  • Publication number: 20140323612
    Abstract: An antireflection coating film for an optical element is provided on a surface of a substrate of an optical material and includes first particles having a refractive index (nd) of at least 2.2 or more for the d-line and an average particle size of 10 to 70 nm, second particles of at least one of silica and sericite and having an average particle size of 1 to 11 ?m, a colorant of an organic substance and soluble in an organic solvent, and a resin, in which the first particle content is in the range of 10% to 35% by weight, and second particle content is in the range of 1% to 11% by weight. The antireflection coating film has a high effect of preventing surface reflection, a high effect of preventing inner-surface reflection, satisfactory absorption of visible light, and low levels of reflection and scattering in the film.
    Type: Application
    Filed: July 2, 2014
    Publication date: October 30, 2014
    Inventor: Reiko Kubota
  • Patent number: 8809421
    Abstract: An antireflection coating film for an optical element is provided on a surface of a substrate of an optical material and includes first particles having a refractive index (nd) of at least 2.2 or more for the d-line and an average particle size of 10 to 70 nm, second particles of at least one of silica and sericite and having an average particle size of 1 to 11 ?m, a colorant of an organic substance and soluble in an organic solvent, and a resin, in which the first particle content is in the range of 10% to 35% by weight, and second particle content is in the range of 1% to 11% by weight. The antireflection coating film has a high effect of preventing surface reflection, a high effect of preventing inner-surface reflection, satisfactory absorption of visible light, and low levels of reflection and scattering in the film.
    Type: Grant
    Filed: February 9, 2011
    Date of Patent: August 19, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventor: Reiko Kubota
  • Publication number: 20120316265
    Abstract: An antireflection coating film for an optical element is provided on a surface of a substrate of an optical material and includes first particles having a refractive index (nd) of at least 2.2 or more for the d-line and an average particle size of 10 to 70 nm, second particles of at least one of silica and sericite and having an average particle size of 1 to 11 ?m, a colorant of an organic substance and soluble in an organic solvent, and a resin, in which the first particle content is in the range of 10% to 35% by weight, and second particle content is in the range of 1% to 11% by weight. The antireflection coating film has a high effect of preventing surface reflection, a high effect of preventing inner-surface reflection, satisfactory absorption of visible light, and low levels of reflection and scattering in the film.
    Type: Application
    Filed: February 9, 2011
    Publication date: December 13, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Reiko Kubota
  • Publication number: 20110244219
    Abstract: Provided is an antireflection paint for an optical element, including black primary particles and secondary particles, in which: the black primary particles each have at least a refractive index for a d line (nd) of 2.0 or more; a ratio between a maximum absorptivity of each of the black primary particles for light having a wavelength of 400 nm or more and 700 nm or less and a minimum absorptivity of each of the particles for the light is larger than 0.7; and the black primary particles have a smaller average particle diameter than an average particle diameter of the secondary particles. Such constitution can prevent surface reflection and internal reflection, absorb light in a visible region well, and alleviate an influence on an environment.
    Type: Application
    Filed: January 28, 2010
    Publication date: October 6, 2011
    Applicant: CANNON KABUSHIKI KAISHA
    Inventor: Reiko Kubota