Patents by Inventor Naotake Okada
Naotake Okada 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).
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Publication number: 20240178539Abstract: A waveguide device includes: an inorganic material substrate; a conductor layer including a signal electrode and first earth electrodes; a support substrate positioned on an opposite side to the conductor layer with respect to the inorganic material substrate; a second earth electrode positioned between the inorganic material substrate and the support substrate; and a third earth electrode positioned on an opposite side to the second earth electrode with respect to the support substrate. The first earth electrodes, the second earth electrode, and the third earth electrode are electrically connected to each other. A thickness âtâ of the inorganic material substrate satisfies the following formula (1).Type: ApplicationFiled: February 6, 2024Publication date: May 30, 2024Applicant: NGK INSULATORS, LTD.Inventors: Kentaro TANI, Naotake OKADA, Jungo KONDO
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Publication number: 20230411818Abstract: The waveguide element includes: a dielectric portion having holes periodically formed in a substrate made of a ceramics material; a low-dielectric constant portion having a dielectric constant smaller than a dielectric constant of the dielectric portion; and a support substrate arranged below the dielectric portion, the support substrate being configured to support the dielectric portion. The waveguide element is configured to guide an electromagnetic wave having a frequency of 30 GHz or more and 20 THz or less, and a frequency range of the electromagnetic wave in which an absolute value of a propagation loss becomes 1 dB/cm or less is 50 GHz or more.Type: ApplicationFiled: September 6, 2023Publication date: December 21, 2023Applicant: NGK INSULATORS, LTD.Inventors: Jungo KONDO, Kentaro TANI, Keiichiro ASAI, Naotake OKADA
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Patent number: 11674652Abstract: A phosphor element includes an incident face for an excitation light, a reflecting face opposing the incident face and a side face, and the phosphor element converts at least a part of the excitation light incident onto the incident face into a fluorescence and emits the fluorescence from the incident face. The incident face has an area greater that an area of the reflecting face. The phosphor element includes an inclination region in which an inclination angle of the side face with respect to a vertical axis perpendicular to the incident face is monotonously increased from the reflecting face toward the incident face, viewed in a cross-section perpendicular to the incident face and along the longest dividing line halving the incident face.Type: GrantFiled: May 18, 2022Date of Patent: June 13, 2023Assignee: NGK INSULATORS, LTD.Inventors: Jungo Kondo, Naotake Okada, Shoichiro Yamaguchi, Tetsuya Ejiri, Yuichi Iwata
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Patent number: 11635189Abstract: A phosphor element includes: a phosphor part having an incident face for excitation light, an opposing face opposing the incident face, and a side face, the phosphor part converting at least a part of the excitation light incident onto the incident face into a fluorescence and emitting the fluorescence from the incident face; an integral low refractive index layer on the side face and opposing face of the phosphor part and having a refractive index lower than that of the phosphor part; and an integral reflection film covering a surface of the low refractive index layer. The area of the incident face of the phosphor part is larger than the area of the opposing face.Type: GrantFiled: January 18, 2022Date of Patent: April 25, 2023Assignee: NGK INSULATORS, LTD.Inventors: Jungo Kondo, Naotake Okada, Yuichi Iwata, Keiichiro Asai, Yudai Uno
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Publication number: 20220275919Abstract: A phosphor element includes an incident face for an excitation light, a reflecting face opposing the incident face and a side face, and the phosphor element converts at least a part of the excitation light incident onto the incident face into a fluorescence and emits the fluorescence from the incident face. The incident face has an area greater that an area of the reflecting face. The phosphor element includes an inclination region in which an inclination angle of the side face with respect to a vertical axis perpendicular to the incident face is monotonously increased from the reflecting face toward the incident face, viewed in a cross-section perpendicular to the incident face and along the longest dividing line halving the incident face.Type: ApplicationFiled: May 18, 2022Publication date: September 1, 2022Applicant: NGK Insulators, Ltd.Inventors: Jungo KONDO, Naotake OKADA, Shoichiro YAMAGUCHI, Tetsuya EJIRI, Yuichi IWATA
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Publication number: 20220278506Abstract: A phosphor element includes an incident face for an excitation light, an emitting face opposing the incident face and a side face, and the element converts at least a part of the incident excitation light incident onto the incident face to fluorescence and emits the fluorescence from the emitting face. The emitting face has an area larger than an area of the incident face. The phosphor element comprises an inclination region in which an inclination angle of the side face with respect to a vertical axis perpendicular to the emitting face is monotonously increased from the incident face toward the emitting face, viewed in a cross-section perpendicular to the emitting face and along the longest dividing line halving the emitting face.Type: ApplicationFiled: May 18, 2022Publication date: September 1, 2022Applicant: NGK Insulators, Ltd.Inventors: Jungo KONDO, Naotake OKADA, Shoichiro YAMAGUCHI, Tetsuya EJIRI, Yuichi IWATA
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Patent number: 11385334Abstract: An optical scanning device includes a supporting body 2; an optical waveguide composed of a single crystal having electro-optic effect and integrated with the supporting body directly or through a clad layer; a plurality of periodic domain inversion parts formed in the optical waveguide, the periodic domain inversion parts having periods different from each other; and a plurality of electrodes capable of applying voltages on the periodic domain inversion parts, respectively, to generate diffraction gratings in the periodic domain inversion parts, respectively. The clad layer is composed of a material having a refractive index lower than a refractive index of the single crystal forming the optical waveguide.Type: GrantFiled: January 2, 2019Date of Patent: July 12, 2022Assignee: NGK Insulators, Ltd.Inventors: Jungo Kondo, Naotake Okada, Tetsuya Ejiri, Keiichiro Asai, Shoichiro Yamaguchi
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Publication number: 20220205612Abstract: A phosphor element includes: a phosphor part having an incident face for excitation light, an opposing face opposing the incident face, and a side face, the phosphor part converting at least a part of the excitation light incident onto the incident face into a fluorescence and emitting the fluorescence from the incident face; an integral low refractive index layer on the side face and opposing face of the phosphor part and having a refractive index lower than that of the phosphor part; and an integral reflection film covering a surface of the low refractive index layer. The area of the incident face of the phosphor part is larger than the area of the opposing face.Type: ApplicationFiled: January 18, 2022Publication date: June 30, 2022Inventors: Jungo KONDO, Naotake OKADA, Yuichi IWATA, Keiichiro ASAI, Yudai UNO
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Patent number: 11262046Abstract: A phosphor element includes: a phosphor part having an incident face for excitation light, an opposing face opposing the incident face, and a side face, the phosphor part converting at least a part of the excitation light incident onto the incident face into a fluorescence and emitting the fluorescence from the incident face; an integral low refractive index layer on the side face and opposing face of the phosphor part and having a refractive index lower than that of the phosphor part; and an integral reflection film covering a surface of the low refractive index layer. The area of the incident face of the phosphor part is larger than the area of the opposing face.Type: GrantFiled: March 26, 2021Date of Patent: March 1, 2022Assignee: NGK INSULATORS, LTD.Inventors: Jungo Kondo, Naotake Okada, Yuichi Iwata, Keiichiro Asai, Yudai Uno
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Patent number: 11112086Abstract: A phosphor device includes a phosphor layer composed of a phosphor glass or phosphor single crystal, a reflective film provided on the phosphor layer, a warping suppression layer provided on the reflective film, and a supporting body bonded to the warping suppression layer by direct bonding. An excitation light incident into the phosphor layer is converted to fluorescence, and the fluorescence and excitation light are reflected by the reflective film and emitted from the phosphor layer.Type: GrantFiled: December 12, 2018Date of Patent: September 7, 2021Assignee: NGK INSULATORS, LTD.Inventors: Naotake Okada, Iwao Ohwada, Shoichiro Yamaguchi, Keiichiro Asai, Jungo Kondo
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Publication number: 20210215318Abstract: A phosphor element includes: a phosphor part having an incident face of the excitation light, an opposing face opposing the incident face, and a side face, the phosphor part converting at least a part of the excitation light incident onto the incident face into the fluorescence and emitting the fluorescence from the incident face; an integral low refractive index layer on the side face and opposing face of the phosphor part and having a refractive index lower than that of the phosphor part; and an integral reflection film covering a surface of the low refractive index layer. The area of the incident face of the phosphor part is larger than the area of the opposing face.Type: ApplicationFiled: March 26, 2021Publication date: July 15, 2021Inventors: Jungo KONDO, Naotake OKADA, Yuichi IWATA, Keiichiro ASAI, Yudai UNO
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Publication number: 20210184425Abstract: A phosphor element includes a phosphor part including an incident face of the excitation light, opposing face opposing the incident face, and side face, the phosphor part converting at least a part of the excitation light incident onto the incident face to fluorescence and emitting the fluorescence from the opposing face or incident face, and a heat dissipating substrate provided on the side face of the phosphor part. The heat dissipating substrate is composed of a metal plating film composed of a metal having a thermal conductivity of 200 W/mK or higher.Type: ApplicationFiled: February 26, 2021Publication date: June 17, 2021Inventors: Jungo KONDO, Keiichiro ASAI, Naotake OKADA
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Patent number: 10995934Abstract: An optical component includes a first substrate including a phosphor substrate and a second substrate including a translucent substrate and supporting the first substrate. The translucent substrate has a polycrystalline structure with orientation.Type: GrantFiled: July 1, 2019Date of Patent: May 4, 2021Assignee: NGK Insulators, Ltd.Inventors: Naotake Okada, Jungo Kondo, Shoichiro Yamaguchi, Iwao Ohwada
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Patent number: 10859747Abstract: A phosphor element comprises: a support substrate; an optical waveguide for propagating an excitation light through the waveguide, the optical waveguide comprising a phosphor generating a fluorescence, and the optical waveguide comprising an emission side end surface emitting the excitation light and the fluorescence, an opposing end surface opposing the emission side end surface, a bottom surface, a top surface opposing the bottom surface and a pair of side surfaces; a bottom surface side clad layer covering the bottom surface of the optical waveguide; a top surface side clad layer covering the top surface of the optical waveguide; side surface side clad layers covering the side surfaces of the optical waveguide, respectively; a top surface side reflection film covering the top surface side clad layer; side surface side reflection films covering the side surface side clad layers, respectively; and a bottom surface side reflection film provided between the support substrate and the bottom surface side clad laType: GrantFiled: June 13, 2019Date of Patent: December 8, 2020Assignee: NGK Insulators, Ltd.Inventors: Jungo Kondo, Naotake Okada, Shoichiro Yamaguchi, Keiichiro Asai, Shuhei Higashihara, Yuichi Iwata, Tetsuya Ejiri, Akira Hamajima
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Publication number: 20190323685Abstract: An optical component includes a first substrate including a phosphor substrate and a second substrate including a translucent substrate and supporting the first substrate. The translucent substrate has a polycrystalline structure with orientation.Type: ApplicationFiled: July 1, 2019Publication date: October 24, 2019Applicant: NGK Insulators, Ltd.Inventors: Naotake OKADA, Jungo KONDO, Shoichiro YAMAGUCHI, lwao OHWADA
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Publication number: 20190309936Abstract: An optical component includes a first substrate including a phosphor substrate and a second substrate including a translucent substrate and supporting the first substrate. A bonding layer is provided between the first substrate and the second substrate, and the bonding layer includes at least one kind of element contained on a surface of the first substrate facing the second substrate and at least one kind of element contained on a surface of the second substrate facing the first substrate. The bonding layer contains 2% by weight or more and 45% by weight or less of at least one kind of metal element which is not included in any of the first substrate and the second substrate.Type: ApplicationFiled: June 11, 2019Publication date: October 10, 2019Inventors: Jungo KONDO, Naotake OKADA, Keiichiro ASAI, Shuhei HIGASHIHARA, Shoichiro YAMAGUCHI
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Publication number: 20190310408Abstract: A phosphor element comprises: a support substrate; an optical waveguide for propagating an excitation light through the waveguide, the optical waveguide comprising a phosphor generating a fluorescence, and the optical waveguide comprising an emission side end surface emitting the excitation light and the fluorescence, an opposing end surface opposing the emission side end surface, a bottom surface, a top surface opposing the bottom surface and a pair of side surfaces; a bottom surface side clad layer covering the bottom surface of the optical waveguide; a top surface side clad layer covering the top surface of the optical waveguide; side surface side clad layers covering the side surfaces of the optical waveguide, respectively; a top surface side reflection film covering the top surface side clad layer; side surface side reflection films covering the side surface side clad layers, respectively; and a bottom surface side reflection film provided between the support substrate and the bottom surface side clad laType: ApplicationFiled: June 13, 2019Publication date: October 10, 2019Applicant: NGK INSULATORS, LTD.Inventors: Jungo KONDO, Naotake OKADA, Shoichiro YAMAGUCHI, Keiichiro ASAI, Shuhei HIGASHIHARA, Yuichi Iwata, Tetsuya Ejiri, Akira Hamajima
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Publication number: 20190154811Abstract: An optical scanning device includes a supporting body 2; an optical waveguide composed of a single crystal having electro-optic effect and integrated with the supporting body directly or through a clad layer; a plurality of periodic domain inversion parts formed in the optical waveguide, the periodic domain inversion parts having periods different from each other; and a plurality of electrodes capable of applying voltages on the periodic domain inversion parts, respectively, to generate diffraction gratings in the periodic domain inversion parts, respectively. The clad layer is composed of a material having a refractive index lower than a refractive index of the single crystal forming the optical waveguide.Type: ApplicationFiled: January 2, 2019Publication date: May 23, 2019Applicant: NGK INSULATORS, LTD.Inventors: Jungo KONDO, Naotake OKADA, Tetsuya EJIRI, Keiichiro ASAI, Shoichiro YAMAGUCHI
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Publication number: 20190120442Abstract: A phosphor device includes a phosphor layer composed of a phosphor glass or phosphor single crystal, a reflective film provided on the phosphor layer, a warping suppression layer provided on the reflective film, and a supporting body bonded to the warping suppression layer by direct bonding. Excitation light incident into the phosphor layer is converted to fluorescence, and the fluorescence and excitation light are reflected by the reflective film and emitted from the phosphor layer.Type: ApplicationFiled: December 12, 2018Publication date: April 25, 2019Inventors: Naotake OKADA, Iwao OHWADA, Shoichiro YAMAGUCHI, Keiichiro ASAI, Jungo KONDO
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Patent number: 10074962Abstract: A grating element includes: a support substrate; an optical material layer; a ridge optical waveguide having an incidence surface on which a laser light is incident and an emission end from which an emission light with a desired wavelength is emitted; and a Bragg grating including concave and convex portions formed within the optical waveguide. The optical waveguide includes an incident portion between the incidence surface and the Bragg grating, and a tapered portion between the incident portion and the Bragg grating. In the Bragg grating, a propagation light propagates in single mode. The width Win of the optical waveguide in the incident portion is larger than the width Wgr of the optical waveguide in the Bragg grating. The width Wt of the optical waveguide in the tapered portion is decreased from the incident portion toward the Bragg grating. The relationships represented by formulas (1) to (3) are satisfied.Type: GrantFiled: October 25, 2016Date of Patent: September 11, 2018Assignee: NGK Insulators, Ltd.Inventors: Jungo Kondo, Shoichiro Yamaguchi, Keiichiro Asai, Tetsuya Ejiri, Naotake Okada