Patents by Inventor Hideo Nakayama
Hideo Nakayama 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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Patent number: 11362135Abstract: A light emitting element array includes a single semiconductor substrate, a plurality of semiconductor elements, which are formed on the single semiconductor substrate, and each of the semiconductor elements including a first distributed Bragg-reflector, an active layer formed over the first distributed Bragg-reflector, and a second distributed Bragg-reflector formed over the active layer. The array includes an electrode pad formed over the second distributed Bragg-reflector and a wiring formed at least partly over the second distributed Bragg-reflector and extending from the electrode pad toward the semiconductor elements. The semiconductor elements include a first semiconductor element, configured to emit laser light, and a second semiconductor element configured not to emit laser light and disposed at a position which is shorter distance along the wiring from the electrode pad than a distance along the wiring from the electrode pad to a position of the first semiconductor element.Type: GrantFiled: August 27, 2019Date of Patent: June 14, 2022Assignee: FUJIFILM Business Innovation Corp.Inventors: Junichiro Hayakawa, Akemi Murakami, Hideo Nakayama, Tsutomu Otsuka
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Patent number: 10869598Abstract: An eyeball optical measuring device includes: an optical measuring unit that irradiates an eyeball of a subject with measuring light to perform an optical measurement of the eyeball; and a light irradiation unit that irradiates the eyeball with irradiation light prior to the optical measurement by the optical measuring unit, the irradiation light having a lower energy density than an energy density of the measuring light.Type: GrantFiled: October 3, 2017Date of Patent: December 22, 2020Assignee: FUJI XEROX CO., LTD.Inventors: Hideaki Ozawa, Kazuyuki Matsushita, Kazutaka Takeda, Kouhei Yukawa, Taku Kinoshita, Hideo Nakayama
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Publication number: 20190386060Abstract: A light emitting element array includes a single semiconductor substrate, a plurality of semiconductor elements, which are formed on the single semiconductor substrate, and each of the semiconductor elements including a first distributed Bragg-reflector, an active layer formed over the first distributed Bragg-reflector, and a second distributed Bragg-reflector formed over the active layer. The array includes an electrode pad formed over the second distributed Bragg-reflector and a wiring formed at least partly over the second distributed Bragg-reflector and extending from the electrode pad toward the semiconductor elements. The semiconductor elements include a first semiconductor element, configured to emit laser light, and a second semiconductor element configured not to emit laser light and disposed at a position which is shorter distance along the wiring from the electrode pad than a distance along the wiring from the electrode pad to a position of the first semiconductor element.Type: ApplicationFiled: August 27, 2019Publication date: December 19, 2019Applicant: FUJI XEROX CO., LTD.Inventors: Junichiro HAYAKAWA, Akemi MURAKAMI, Hideo NAKAYAMA, Tsutomu OTSUKA
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Patent number: 10484087Abstract: An optical transmission device includes a first light emitting element, a second light emitting element, and a detection unit. The first light emitting element is configured to emit light. The second light emitting element is configured to emit light. The second light emitting element is connected in parallel with the first light emitting element and is configured to deteriorate earlier than the first light emitting element. The detection unit is configured to detect whether the second light emitting element is deteriorated.Type: GrantFiled: October 6, 2017Date of Patent: November 19, 2019Assignee: FUJI XEROX CO., LTD.Inventors: Akemi Murakami, Junichiro Hayakawa, Hideo Nakayama, Tsutomu Otsuka
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Patent number: 10438993Abstract: A light emitting element array includes plural light emitting elements connected in parallel to each other by a wiring connected to a terminal that supplies a current. Each of the light emitting elements is disposed at a position of a predetermined path length along a path of the current flowing from the terminal through the wiring. The plural light emitting elements include, in a mixed form, one or more first light emitting elements each having a non-shielded light emission aperture and one or more second light emitting elements each having a shielded light emission aperture. At least one of the first light emitting elements is disposed at a position of the longest path length. At least one of the second light emitting elements is disposed at a position of the shortest path length.Type: GrantFiled: October 23, 2017Date of Patent: October 8, 2019Assignee: FUJI XEROX CO., LTD.Inventors: Junichiro Hayakawa, Akemi Murakami, Hideo Nakayama, Tsutomu Otsuka
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Patent number: 10349831Abstract: An optical measuring instrument 1 is equipped with an optical system 20 to be used for measuring a characteristic of the aqueous humor in the anterior chamber 13 of an eyeball 10 of a measurement subject person and a holding unit 50 which holds the optical system 20 etc. The optical system 20 is equipped with a light emitting system 20A and a photodetecting system 20B. An optical path 28 is set so that light emitted from the light emitting system 20A passes through (traverses) the anterior chamber 13 and is detected by the photodetecting system 20B in a state that the eyeball 10 is turned outward.Type: GrantFiled: May 6, 2016Date of Patent: July 16, 2019Assignee: FUJI XEROX CO., LTD.Inventors: Kazuyuki Matsushita, Kazutaka Takeda, Kohei Yukawa, Hideaki Ozawa, Taku Kinoshita, Hideo Nakayama
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Patent number: 10177532Abstract: A light emitting element array includes plural light emitting elements connected in parallel to each other by a wiring connected to a terminal configured to supply a current. The number of light emitting elements which have the shortest path length among path lengths on the wiring from the terminal to the respective light emitting elements along a path of the current is one.Type: GrantFiled: October 13, 2017Date of Patent: January 8, 2019Assignee: FUJI XEROX CO., LTD.Inventors: Junichiro Hayakawa, Akemi Murakami, Hideo Nakayama, Tsutomu Otsuka
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Publication number: 20180138971Abstract: An optical transmission device includes a first light emitting element, a second light emitting element, and a detection unit. The first light emitting element is configured to emit light. The second light emitting element is configured to emit light. The second light emitting element is connected in parallel with the first light emitting element and is configured to deteriorate earlier than the first light emitting element. The detection unit is configured to detect whether the second light emitting element is deteriorated.Type: ApplicationFiled: October 6, 2017Publication date: May 17, 2018Applicant: FUJI XEROX CO., LTD.Inventors: Akemi MURAKAMI, Junichiro HAYAKAWA, Hideo NAKAYAMA, Tsutomu OTSUKA
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Publication number: 20180138236Abstract: A light emitting element array includes plural light emitting elements connected in parallel to each other by a wiring connected to a terminal that supplies a current. Each of the light emitting elements is disposed at a position of a predetermined path length along a path of the current flowing from the terminal through the wiring. The plural light emitting elements include, in a mixed form, one or more first light emitting elements each having a non-shielded light emission aperture and one or more second light emitting elements each having a shielded light emission aperture. At least one of the first light emitting elements is disposed at a position of the longest path length. At least one of the second light emitting elements is disposed at a position of the shortest path length.Type: ApplicationFiled: October 23, 2017Publication date: May 17, 2018Applicant: FUJI XEROX CO., LTD.Inventors: Junichiro HAYAKAWA, Akemi MURAKAMI, Hideo NAKAYAMA, Tsutomu OTSUKA
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Publication number: 20180138660Abstract: A light emitting element array includes plural light emitting elements connected in parallel to each other by a wiring connected to a terminal configured to supply a current. The number of light emitting elements which have the shortest path length among path lengths on the wiring from the terminal to the respective light emitting elements along a path of the current is one.Type: ApplicationFiled: October 13, 2017Publication date: May 17, 2018Applicant: FUJI XEROX CO., LTD.Inventors: Junichiro HAYAKAWA, Akemi MURAKAMI, Hideo NAKAYAMA, Tsutomu OTSUKA
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Publication number: 20180098695Abstract: An eyeball optical measuring device includes: an optical measuring unit that irradiates an eyeball of a subject with measuring light to perform an optical measurement of the eyeball; and a light irradiation unit that irradiates the eyeball with irradiation light prior to the optical measurement by the optical measuring unit, the irradiation light having a lower energy density than an energy density of the measuring light.Type: ApplicationFiled: October 3, 2017Publication date: April 12, 2018Applicant: FUJI XEROX CO., LTD.Inventors: Hideaki OZAWA, Kazuyuki MATSUSHITA, Kazutaka TAKEDA, Kouhei YUKAWA, Taku KINOSHITA, Hideo NAKAYAMA
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Patent number: 9936874Abstract: An optical measurement apparatus includes: an emission section that emits light such that the light travels across an anterior chamber of an eyeball of a measurement subject; a light reception section that receives light that is emitted from the emission section and travels across the anterior chamber; and a positioning section that performs positioning of one of the emission section and the light reception section at a position where skin on a periphery of an inner canthus of the eyeball is squeezed into an eye socket accommodating the eyeball.Type: GrantFiled: March 31, 2017Date of Patent: April 10, 2018Assignee: FUJI XEROX CO., LTD.Inventors: Saori Nishizaki, Taku Kinoshita, Kazutaka Takeda, Hideaki Ozawa, Kazuyuki Matsushita, Kohei Yukawa, Sho Kimura, Hideo Nakayama
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Patent number: 9851293Abstract: A concentration calculation system calculates a concentration of the optically active substance based on a formula. The formula includes a first function representing wavelength dependence of an optical rotation of a first optically-active substance, and a second function representing wavelength dependence of an optical rotation of a second optically-active substance. In the first function, concentration of the first optically-active substance has an unknown value, and an inherent value for defining a characteristic of optical rotatory dispersion of the first optically-active substance is a known value or an unknown value within a certain limited range. In the second function, an inherent value for defining a characteristic of optical rotatory dispersion of the second optically-active substance is an unknown value.Type: GrantFiled: April 26, 2016Date of Patent: December 26, 2017Assignee: FUJI XEROX CO., LTD.Inventors: Kazutaka Takeda, Kazuyuki Matsushita, Kohei Yukawa, Hideaki Ozawa, Taku Kinoshita, Hideo Nakayama
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Patent number: 9806498Abstract: A vertical-cavity surface-emitting laser diode includes: a first resonator that has a plurality of semiconductor layers comprising a first current narrowing structure having a first conductive region and a first non-conductor region; a first electrode that supplies electric power to drive the first resonator; a second resonator that has a plurality of semiconductor layers comprising a second current narrowing structure having a second conductive region and a second non-conductive region and that is formed side by side with the first resonator, the second current narrowing structure being formed in same current narrowing layer as the layer where the first current narrowing structure is formed; and a coupling portion as defined herein; and an equivalent refractive index of the coupling portion is smaller than an equivalent refractive index of each of the first resonator and the second resonator.Type: GrantFiled: May 2, 2016Date of Patent: October 31, 2017Assignees: TOKYO INSTITUTE OF TECHNOLOGY, FUJI XEROX CO., LTD.Inventors: Fumio Koyama, Hamed Dalir, Takashi Kondo, Naoki Jogan, Kazutaka Takeda, Hideo Nakayama
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Publication number: 20170202456Abstract: A measurement apparatus includes: an eyelid opening section that comes into contact with skin on a periphery of an eyeball of a measurement subject and maintains an eyelid of the measurement subject in an open state; an emission section that emits light such that the light travels across an anterior chamber of the eyeball in which the eyelid is maintained in an open state by the eyelid opening portion; and a light reception section that receives the light which travels across the anterior chamber.Type: ApplicationFiled: March 31, 2017Publication date: July 20, 2017Applicant: FUJI XEROX CO., LTD.Inventors: Saori NISHIZAKI, Hideo NAKAYAMA, Taku KINOSHITA, Kazutaka TAKEDA, Hideaki OZAWA, Kazuyuki MATSUSHITA, Kohei YUKAWA, Sho KIMURA
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Publication number: 20170202458Abstract: An optical measurement apparatus includes: an emission section that emits light such that the light travels across an anterior chamber of an eyeball of a measurement subject; a light reception section that receives light that is emitted from the emission section and travels across the anterior chamber; and a positioning section that performs positioning of one of the emission section and the light reception section at a position where skin on a periphery of an inner canthus of the eyeball is squeezed into an eye socket accommodating the eyeball.Type: ApplicationFiled: March 31, 2017Publication date: July 20, 2017Applicant: FUJI XEROX CO., LTD.Inventors: Saori NISHIZAKI, Taku KINOSHITA, Kazutaka TAKEDA, Hideaki OZAWA, Kazuyuki MATSUSHITA, Kohei YUKAWA, Sho KIMURA, Hideo NAKAYAMA
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Publication number: 20170049320Abstract: An optical measuring apparatus includes a light output device that outputs light so as to cross an anterior chamber of an eyeball of a subject, a light receiving device that receives the light having crossed the anterior chamber, and a positioning device that positions the light output device and the light receiving device at such positions that, when the eyeball is adducted, the light output from the light output device crosses the anterior chamber and is received by the light receiving device.Type: ApplicationFiled: July 1, 2016Publication date: February 23, 2017Applicant: FUJI XEROX CO., LTD.Inventors: Saori NISHIZAKI, Taku KINOSHITA, Kazutaka TAKEDA, Hideaki OZAWA, Kazuyuki MATSUSHITA, Kouhei YUKAWA, Sho KIMURA, Hideo NAKAYAMA
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Publication number: 20170020385Abstract: A concentration calculation system of an optically active substance, includes: a calculation unit configured to: acquire an amount of change in a polarization state by allowing light having different wavelengths to pass through a cornea and an aqueous humor; and calculate a concentration of a specific optically active substance contained in the aqueous humor by a least squares method based on a theoretical formula which includes a matrix representing a polarization property of the cornea and a matrix representing a polarization property of the aqueous humor and represents a wavelength dependence of the amount of the change, wherein the matrix representing the polarization property of the aqueous humor is represented by a function of an expression representing the wavelength dependence of an optical rotation degree of the specific substance and the expression includes a concentration value of the specific substance as an unknown quantity or a temporal known quantity.Type: ApplicationFiled: June 30, 2016Publication date: January 26, 2017Applicant: FUJI XEROX CO., LTD.Inventors: Kazuyuki MATSUSHITA, Kazutaka TAKEDA, Kohei YUKAWA, Hideaki OZAWA, Taku KINOSHITA, Hideo NAKAYAMA
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Publication number: 20160249802Abstract: An optical measuring instrument 1 is equipped with an optical system 20 to be used for measuring a characteristic of the aqueous humor in the anterior chamber 13 of an eyeball 10 of a measurement subject person and a holding unit 50 which holds the optical system 20 etc. The optical system 20 is equipped with a light emitting system 20A and a photodetecting system 20B. An optical path 28 is set so that light emitted from the light emitting system 20A passes through (traverses) the anterior chamber 13 and is detected by the photodetecting system 20B in a state that the eyeball 10 is turned outward.Type: ApplicationFiled: May 6, 2016Publication date: September 1, 2016Applicant: FUJI XEROX CO., LTD.Inventors: Kazuyuki MATSUSHITA, Kazutaka TAKEDA, Kohei YUKAWA, Hideaki OZAWA, Taku KINOSHITA, Hideo NAKAYAMA
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Publication number: 20160248227Abstract: A vertical-cavity surface-emitting laser diode includes: a first resonator that has a plurality of semiconductor layers comprising a first current narrowing structure having a first conductive region and a first non-conductor region; a first electrode that supplies electric power to drive the first resonator; a second resonator that has a plurality of semiconductor layers comprising a second current narrowing structure having a second conductive region and a second non-conductive region and that is formed side by side with the first resonator, the second current narrowing structure being formed in same current narrowing layer as the layer where the first current narrowing structure is formed; and a coupling portion as defined herein; and an equivalent refractive index of the coupling portion is smaller than an equivalent refractive index of each of the first resonator and the second resonator.Type: ApplicationFiled: May 2, 2016Publication date: August 25, 2016Applicants: TOKYO INSTITUTE OF TECHNOLOGY, FUJI XEROX CO., LTD.Inventors: Fumio KOYAMA, Hamed DALIR, Takashi KONDO, Naoki JOGAN, Kazutaka TAKEDA, Hideo NAKAYAMA