Patents by Inventor Nobuaki Nagao

Nobuaki Nagao 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: 10570034
    Abstract: A flocculation monitoring apparatus and a flocculation monitoring method are provided, and the flocculation monitoring apparatus and the flocculation monitoring method are capable of stably measuring a flocculation state of water to be treated even when the number (density) of flocs has increased. A measurement-light applying part (laser-light applying part 10) applies a measurement light to a measurement region (18) in the water to be treated (8) and a scattered-light receiving part (12) receives a scattered light due to particles of the water to be treated. A measurement value arithmetic part (arithmetic circuit 48) calculates an index related to flocculation of the water to be treated, by using an amplitude of a light reception signal acquired in the scattered-light receiving part.
    Type: Grant
    Filed: July 21, 2016
    Date of Patent: February 25, 2020
    Assignee: KURITA WATER INDUSTRIES LTD.
    Inventors: Nobuaki Nagao, Yasuhiro Mugibayashi
  • Publication number: 20200003873
    Abstract: An optical scanning device includes: first and second mirrors; an optical waveguide layer disposed between the first and second mirrors; a pair of electrodes sandwiching the optical waveguide layer; and a driving circuit that applies a voltage to the pair of electrodes. The first mirror has a higher light transmittance than the second mirror and emits part of light propagating through the optical waveguide layer to the outside. The optical waveguide layer contains a liquid crystal material or an electrooptical material. The alignment direction of the liquid crystal material or the direction of a polarization axis of the electrooptical material is parallel or perpendicular to the direction in which the optical waveguide layer extends. The driving circuit applies the voltage to the pair of electrodes to change the refractive index of the liquid crystal material or the electrooptical material to thereby change the light emission direction.
    Type: Application
    Filed: September 12, 2019
    Publication date: January 2, 2020
    Inventors: NOBUAKI NAGAO, YOSHIKAZU YAMAOKA, YASUHISA INADA, AKIRA HASHIYA, TAKU HIRASAWA
  • Publication number: 20190233727
    Abstract: A phosphor comprises a crystal phase with a chemical composition (Lu1-p-q, Cep, Mq)x?y?zO. M denotes one or more elements selected from the group consisting of Y, La, Sc, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, and Yb. ? contains Si, which constitutes 90% or more by mole of ?. ? contains N, which constitutes 90% or more by mole of ?. The variables x, y, z, p, and q satisfy 5.5?x?6.5, 10.5?y?11.5, 19.5?z?20.5, 0<p<0.03, and 0?q?0.5.
    Type: Application
    Filed: November 14, 2018
    Publication date: August 1, 2019
    Inventors: MITSURU NITTA, NOBUAKI NAGAO, YASUHISA INADA
  • Patent number: 10359155
    Abstract: A light-emitting apparatus includes an excitation light source that emits first light; a light-emitting device on an optical path of the first light, the light-emitting device emitting second light having a wavelength in air; and a first converging lens on an optical path of the second light. The light-emitting device comprises: a photoluminescent layer that emits the second light by being excited by the first light; and a light-transmissive layer on the photoluminescent layer. At least one of the photoluminescent layer and the light-transmissive layer has a surface structure comprising projections or recesses arranged perpendicular to a thickness direction of the photoluminescent layer. At least one of the photoluminescent layer and the light-transmissive layer has a light emitting surface perpendicular to the thickness direction, the second light emitted from the light emitting surface. The surface structure limits the directional angle of the second light emittied from the light emitting surface.
    Type: Grant
    Filed: July 10, 2016
    Date of Patent: July 23, 2019
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Taku Hirasawa, Yasuhisa Inada, Akira Hashiya, Nobuaki Nagao, Akira Tsujimoto
  • Publication number: 20190177614
    Abstract: A phosphor includes a crystal phase with a chemical composition (LuxY1-x)yM3-y-zCez?p?q. M denotes one or more elements selected from the group consisting of La, Sc, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, and Yb. ? contains Si, which constitutes 90% or more by mole of ?. ? contains N, which constitutes 90% or more by mole of ?. The variables x, y, z, p, and q satisfy 0<x?1, 1.5?y?3?z, 0<z?0.6, 5.5?p?6.5, and 10.5?q?11.5. The phosphor has an emission spectrum peak at a wavelength in the range of not less than 600 nm and not more than 680 nm.
    Type: Application
    Filed: October 24, 2018
    Publication date: June 13, 2019
    Inventors: NOBUAKI NAGAO, MITSURU NITTA
  • Publication number: 20190144296
    Abstract: A phosphor contains a crystal phase having a chemical composition CexM3-x-y?6?11-z. M is one or more elements selected from the group consisting of Sc, Y, La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu. ? contains Si in an amount of 50 mol % or more of a total mol of ?. ? further contains Al. ? contains N in an amount of 80 mol % or more N of a total mol of ?. x satisfies 0<x?0.6. y satisfies 0?y?1.0. z satisfies 0?z?1.0.
    Type: Application
    Filed: January 10, 2019
    Publication date: May 16, 2019
    Inventors: Mitsuru NITTA, Yasuhisa INADA, Nobuaki NAGAO
  • Patent number: 10214429
    Abstract: A phosphor contains a crystal phase having a chemical composition CexM3-x-y?6?11-z. M is one or more elements selected from the group consisting of Sc, Y, La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu. ? contains Si in an amount of 50 mol % or more of a total mol of ?. ?contains N in an amount of 80 mol % or more N of a total mol of ?. x satisfies 0<x?0.6. y satisfies 0?y?1.0. z satisfies 0?z?1.0. The phosphor shows a maximum peak of an emission spectrum in a wavelength range of 600 nm or more and 800 nm or less and a first peak of an excitation spectrum in a wavelength range of 500 nm or more and 600 nm or less.
    Type: Grant
    Filed: June 29, 2017
    Date of Patent: February 26, 2019
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Mitsuru Nitta, Yasuhisa Inada, Nobuaki Nagao
  • Patent number: 10182702
    Abstract: A light-emitting apparatus includes; a light-emitting device including a photoluminescent layer that receives excitation light and emits light including first light having a wavelength ?a in air, and a light-transmissive layer located on or near the photoluminescent layer; and an optical fiber that receives the light from the photoluminescent layer at one end of the optical fiber and emits the received light from the other end thereof. A surface structure is defined on at least one of the photoluminescent layer and the light-transmissive layer, and the surface structure has projections or recesses or both and limits a directional angle of the first light having the wavelength ?a in air.
    Type: Grant
    Filed: March 3, 2016
    Date of Patent: January 22, 2019
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Nobuaki Nagao, Taku Hirasawa, Yasuhisa Inada, Mitsuru Nitta, Akira Hashiya, Yasuhiko Adachi
  • Publication number: 20190004393
    Abstract: An optical scanning device includes: a first waveguide that propagates light by total reflection; and a second waveguide. The second waveguide includes: a first multilayer reflective film; a second multilayer reflective film that faces the first multilayer reflective film; and a first optical waveguide layer directly connected to the first waveguide and located between the first and second multilayer reflective films. The first optical waveguide layer has a variable thickness and/or a variable refractive index and propagates the light transmitted through the first waveguide. The first multilayer reflective film has a higher light transmittance than the second multilayer reflective film and allows part of the light propagating through the first optical waveguide layer to be emitted to the outside. By changing the thickness of the first optical waveguide layer and/or its refractive index, the direction of the part of the light emitted from the second waveguide is changed.
    Type: Application
    Filed: August 22, 2018
    Publication date: January 3, 2019
    Inventors: AKIRA HASHIYA, YASUHISA INADA, TAKU HIRASAWA, YOSHIKAZU YAMAOKA, NOBUAKI NAGAO
  • Publication number: 20180372951
    Abstract: An optical scanning device includes a waveguide array including a plurality of waveguides arranged in a first direction. Each waveguide includes: an optical waveguide layer that propagates light supplied to the waveguide in a second direction intersecting the first direction; a first mirror having a first reflecting surface intersecting a third direction; and a second mirror having a second reflecting surface that faces the first reflecting surface. The optical waveguide layer is located between the first and second mirrors and has a variable thickness and/or a variable refractive index for the light. The width of the first mirror and the width of the second mirror are each larger than the width of the optical waveguide layer. The first mirror has a higher light transmittance than the second mirror and allows part of the light propagating through the optical waveguide layer to be emitted in the third direction.
    Type: Application
    Filed: August 29, 2018
    Publication date: December 27, 2018
    Inventors: AKIRA HASHIYA, YASUHISA INADA, TAKU HIRASAWA, YOSHIKAZU YAMAOKA, NOBUAKI NAGAO
  • Publication number: 20180346808
    Abstract: A phosphor comprises a crystal phase that has a chemical composition of (Y1-x-y,Cex,Lay)?Si?-zAlzN?O, where the ? satisfies 5.5???6.5, the ? satisfies 9.5???12.5, the ? satisfies 17.5???22.5, the x satisfies 0<x?0.1, the y satisfies 0?y?0.4, and the z satisfies 0?z?0.5. A light emission spectrum of the phosphor includes a peak within a wavelength range of not less than 600 nm and not more than 660 nm.
    Type: Application
    Filed: May 23, 2018
    Publication date: December 6, 2018
    Inventors: MITSURU NITTA, NOBUAKI NAGAO
  • Publication number: 20180217482
    Abstract: A projector includes a light source unit, a spatial light modulator configured to control light from the light source unit for each pixel to form an optical image, and a projection optical system configured to project the optical image formed by the spatial light modulator onto a target. The light source unit includes a solid-state light source and a wavelength convertor. The solid-state light source is configured to emit first light, the first light including blue light with a peak wavelength in a range of 430 to 470 nm, inclusive, and green light with a peak wavelength in a range of 480 to 550 nm, inclusive. The wavelength convertor contains a red phosphor including Ce as a luminescent center that is configured to emit second light upon receiving the green light. The second light has a spectrum with a peak wavelength of 600 to 700 nm, inclusive. The red phosphor contains a nitride or an oxynitride as a host material.
    Type: Application
    Filed: March 23, 2018
    Publication date: August 2, 2018
    Inventors: NOBUAKI NAGAO, MITSURU NITTA, YASUHISA INADA
  • Publication number: 20180216002
    Abstract: A fiber light source includes a solid-state light source, a wavelength convertor, and an optical fiber. The solid-state light source is configured to emit first light, the first light including blue light with a peak wavelength in a range of 430 to 470 nm, inclusive, and green light with a peak wavelength in a range of 480 to 550 nm, inclusive. The wavelength convertor is disposed on the light output side or the light incident side of the optical fiber and contains a red phosphor. The red phosphor includes Ce as a luminescent center, and is excited by at least part of the green light to emit second light. The second light has a spectrum with a peak wavelength in a range of 600 to 700 nm, inclusive. The red phosphor contains a nitride or an oxynitride as a host material.
    Type: Application
    Filed: March 23, 2018
    Publication date: August 2, 2018
    Inventors: NOBUAKI NAGAO, MITSURU NITTA, YASUHISA INADA
  • Publication number: 20180212112
    Abstract: A light-emitting apparatus includes: a solid-state light source; and a wavelength convertor. The solid-state light source emits first light including green light with a peak wavelength in a range of 480 to 550 nm, inclusive. The wavelength convertor contains a red phosphor including Ce as a luminescent center. The red phosphor is excited by at least part of the green light to emit second light. The second light has a spectrum with a peak wavelength in a range of 600 to 700 nm, inclusive. The red phosphor contains a nitride or an oxynitride as a host material.
    Type: Application
    Filed: March 23, 2018
    Publication date: July 26, 2018
    Inventors: MITSURU NITTA, NOBUAKI NAGAO, YASUHISA INADA
  • Publication number: 20180201527
    Abstract: A flocculation monitoring apparatus and a flocculation monitoring method are provided, and the flocculation monitoring apparatus and the flocculation monitoring method are capable of stably measuring a flocculation state of water to be treated even when the number (density) of flocs has increased. A measurement-light applying part (laser-light applying part 10) applies a measurement light to a measurement region (18) in the water to be treated (8) and a scattered-light receiving part (12) receives a scattered light due to particles of the water to be treated. A measurement value arithmetic part (arithmetic circuit 48) calculates an index related to flocculation of the water to be treated, by using an amplitude of a light reception signal acquired in the scattered-light receiving part.
    Type: Application
    Filed: July 21, 2016
    Publication date: July 19, 2018
    Applicant: KURITA WATER INDUSTRIES LTD.
    Inventors: Nobuaki Nagao, Yasuhiro Mugibayashi
  • Publication number: 20180038575
    Abstract: The phosphor according to an aspect of the present disclosure contains a crystal phase having a chemical composition CexYyLa3-x-ySi6N11, where x and y satisfy 0<x?0.6, and (1.5?x)?y?(3?x). The phosphor has an emission spectral peak within a wavelength range of 600 nm or more and 660 nm or less and a first excitation spectral peak within a wavelength range of 480 nm or more and 550 nm or less.
    Type: Application
    Filed: October 3, 2017
    Publication date: February 8, 2018
    Inventors: NOBUAKI NAGAO, MITSURU NITTA, YASUHISA INADA
  • Publication number: 20180002188
    Abstract: A phosphor contains a crystal phase having a chemical composition CexM3-x-y?6?11-z. M is one or more elements selected from the group consisting of Sc, Y, La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu. ? contains Si in an amount of 50 mol % or more of a total mol of ?. ?contains N in an amount of 80 mol % or more N of a total mol of ?. x satisfies 0<x?0.6. y satisfies 0?y?1.0. z satisfies 0?z?1.0. The phosphor shows a maximum peak of an emission spectrum in a wavelength range of 600 nm or more and 800 nm or less and a first peak of an excitation spectrum in a wavelength range of 500 nm or more and 600 nm or less.
    Type: Application
    Filed: June 29, 2017
    Publication date: January 4, 2018
    Inventors: MITSURU NITTA, YASUHISA INADA, NOBUAKI NAGAO
  • Patent number: 9841157
    Abstract: A lamp includes: first and second semiconductor light-emitting elements adapted to emit excitation light; a wavelength conversion element adapted to convert the excitation light into light having a peak wavelength different from that of the excitation light; and a concave mirror adapted to reflect the excitation light emitted from the semiconductor light-emitting elements to the wavelength conversion element and reflect the light from the wavelength conversion element toward an outside of the lamp. A distance y1 from an optical axis of the first semiconductor light-emitting element to an optical axis of the concave mirror satisfies (D+Dphos)/2?y1?4f, and a distance y2 from an optical axis of the second semiconductor light-emitting element to the optical axis of the concave mirror satisfies 4f<y2?R.
    Type: Grant
    Filed: June 1, 2015
    Date of Patent: December 12, 2017
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Nobuaki Nagao, Seigo Shiraishi, Yoshihisa Nagasaki, Takashi Ohbayashi
  • Patent number: 9691599
    Abstract: An ultraviolet light emitting device comprises: a first substrate having a main surface; a second substrate facing the main surface of the first substrate; a gas in a space between the first substrate and the second substrate; electrodes directly or indirectly on the main surface of the first substrate; a dielectric layer that is located directly or indirectly on the main surface of the first substrate and covers the electrodes; and a first light-emitting layer. The first light-emitting layer is located directly or indirectly on the dielectric layer and emits ultraviolet light in the gas due to electrical discharge between the electrodes. The first light-emitting layer is thicker in first regions on the dielectric layer than in second regions. The second regions include at least part of regions directly above the electrodes.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: June 27, 2017
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Takehiro Zukawa, Yoshiki Sasaki, Nobuaki Nagao
  • Patent number: 9691600
    Abstract: An ultraviolet light emitting device includes: a first substrate; a second substrate; a gas in a space between the first substrate and the second substrate; electrodes directly or indirectly on a first main surface of the first substrate; a dielectric layer that is located in a first region directly or indirectly on the first main surface of the first substrate and covers the electrodes, the dielectric layer being not located in a second region directly or indirectly on the first main surface of the first substrate, the second region being different from the first region, the first region including regions in which the electrodes are located; and a light-emitting layer that is located in the second region and/or located directly or indirectly on at least one of second and third main surfaces of the second substrate and emits the ultraviolet light in the gas due to electrical discharge between the electrodes.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: June 27, 2017
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Takehiro Zukawa, Yoshiki Sasaki, Nobuaki Nagao