Patents by Inventor Ryoichi Kasahara
Ryoichi Kasahara 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: 20180344208Abstract: There is provided a respiration estimation method. The respiration estimation method includes a first step (S107) of estimating a breathing rate of a subject based on each of a time-series signal of first data relating to a cardiac function of the subject and a time-series signal of second data relating to an acceleration by a respiratory motion of the subject, a second step (S108) of estimating a breathing rate obtained by filtering noise using a Kalman filter for each of the breathing rate estimated based on the first data and the breathing rate estimated based on the second data, and a third step (S109) of executing weighted averaging processing for the plurality of estimated values of the breathing rates obtained in the second step.Type: ApplicationFiled: November 25, 2016Publication date: December 6, 2018Inventors: Takayuki Ogasawara, Takurou Tajima, Kei Kuwabara, Nobuaki Matsuura, Ryoichi Kasahara
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Publication number: 20180333064Abstract: There is provided a respiration estimation apparatus.Type: ApplicationFiled: November 4, 2016Publication date: November 22, 2018Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Takayuki OGASAWARA, Takuro TAJIMA, Kei KUWABARA, Nobuaki MATSUURA, Ryoichi KASAHARA
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Publication number: 20170340226Abstract: A bioelectrode includes a fitting member (1106) formed by an electrically insulating member fixed on a surface of a garment (1100) that comes in contact with a living body (1000), an electrode part (1101a) formed by a conductive member fixed on a surface of the fitting member (1106) that comes in contact with the living body (1000), a connector (1102a) fixed to the fitting member (1106) and configured to connect a bioelectric signal measurement device, a wiring line (1103a) fixed to the fitting member (1106) and configured to electrically connect the connector (1102a) and the electrode part (1101a), and an electrically-insulating insulating member (1105) configured to cover a portion within the surface of the wiring line (1103a) that comes in contact with the living body (1000).Type: ApplicationFiled: December 7, 2015Publication date: November 30, 2017Inventors: Kazuhiko TAKAGAHARA, Ryusuke KAWANO, Takako ISHIHARA, Michiko SEYAMA, Ryoichi KASAHARA, Yasuhiro SATO, Atsushi HORIUCHI, Masanobu SATO, Emiko ISHIKAWA, Keiji TAKEDA, Noriko NAGAI
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Patent number: 9560763Abstract: A package for optical module includes a flat-plate-shaped metal base, and a ceramic circuit board in which a plurality of terminals are arranged in a longitudinal direction, and which is joined to an upper surface of the metal base by soldering. The ceramic circuit board has a shape change portion in which the ceramic circuit board is changed in shape along the longitudinal direction, and a region of the ceramic circuit board not including the shape change portion is joined to the metal base by soldering. The shape change portion of the ceramic circuit board is a portion where a width is changed along the longitudinal direction, or a portion where a thickness is changed along the longitudinal direction.Type: GrantFiled: July 1, 2013Date of Patent: January 31, 2017Assignees: Nippon Telegraph and Telephone Corporation, NTT Electronics corporationInventors: Ikuo Ogawa, Ryoichi Kasahara, Toshiki Nishizawa, Yuji Mitsuhashi
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Patent number: 9459417Abstract: In an integrated optical receiver or transmitter, both the displacement of an optical axis caused by thermal changes and the property degradation of an optical functional circuit are inhibited. A planar lightwave circuit having a substrate and a waveguide-type optical functional circuit formed thereon composed of a material different from that of the substrate, and includes a waveguide region formed only of an optical wavelength that is in contact with a side forming an emission-end face of the optical waveguide for propagating the light emitted from the optical functional circuit or an incident-end face of an optical waveguide for propagating the light incident on the optical functional circuit. The planar lightwave circuit is fixed to a fixing mount only at the bottom of the substrate where the waveguide region is formed.Type: GrantFiled: March 26, 2015Date of Patent: October 4, 2016Assignees: Nippon Telegraph and Telephone Corporation, NTT Electronics CorporationInventors: Yusuke Nasu, Ryoichi Kasahara, Ikuo Ogawa, Kenya Suzuki, Fumihiro Ebisawa
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Patent number: 9323000Abstract: Provided is a waveguide-type polarization beam splitter in which deterioration of a polarization extinction ratio due to temperature change and wavelength change is suppressed. The waveguide-type polarization beam splitter includes: input optical waveguides; a first multimode interference optical coupler; a pair of optical waveguide arms; a second multimode interference optical coupler; and output optical waveguides. A quarter wavelength delay is provided in one of the pair of optical waveguide arms, a groove is formed to extend across both of the pair of optical waveguide arms, and two quarter wave plates are provided in the groove to extend respectively across the arms. Polarization axes of the respective quarter wave plates are orthogonal to each other.Type: GrantFiled: January 25, 2012Date of Patent: April 26, 2016Assignee: Nippon Telegraph and Telephone CorporationInventors: Takashi Saida, Yusuke Nasu, Takayuki Mizuno, Ryoichi Kasahara
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Patent number: 9267020Abstract: A rubber composition that can improve in good balance the fuel economy, wet-grip performance, and abrasion resistance, and a pneumatic tire that uses this rubber composition are provided. This rubber composition contains a rubber component, and carbon black and/or silica, wherein based on 100% by mass of the rubber component, the rubber component contains 5 to 50% by mass of natural rubber, 0.3 to 10% by mass of an epoxidized natural rubber, and at least 5% by mass of a conjugated diene polymer that has a constituent unit based on a conjugated diene and a constituent unit represented by formula (I) below, at least one terminal of the polymer being modified, and wherein a total content of the carbon black and the silica is 3 to 100 parts by mass per 100 parts by mass of the rubber component.Type: GrantFiled: December 12, 2011Date of Patent: February 23, 2016Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Toshikazu Kondo, Jun Okamoto, Sakae Okubo, Ryoichi Kasahara, Kenji Murata, Kazuhiro Kodama, Kazuyuki Nishioka
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Patent number: 9235003Abstract: Provided is a waveguide-type polarization beam splitter in which deterioration of a polarization extinction ratio due to temperature change and wavelength change is suppressed. A groove is formed to extend across a pair of optical waveguide arms and two quarter wave plates are provided in the groove to extend respectively across the arms. Polarization axes of the quarter wave plates are orthogonal to each other. A first optical coupler which gives a phase difference of 0° or 180° between coupled or split light beams and a second optical coupler which gives a phase difference of 90° or ?90° between coupled or split light beams are used in combination.Type: GrantFiled: January 25, 2012Date of Patent: January 12, 2016Assignee: Nippon Telegraph and Telephone CorporationInventors: Takashi Saida, Yusuke Nasu, Takayuki Mizuno, Ryoichi Kasahara
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Publication number: 20150334838Abstract: A package for optical module includes a flat-plate-shaped metal base, and a ceramic circuit board in which a plurality of terminals are arranged in a longitudinal direction, and which is joined to an upper surface of the metal base by soldering. The ceramic circuit board has a shape change portion in which the ceramic circuit board is changed in shape along the longitudinal direction, and a region of the ceramic circuit board not including the shape change portion is joined to the metal base by soldering. The shape change portion of the ceramic circuit board is a portion where a width is changed along the longitudinal direction, or a portion where a thickness is changed along the longitudinal direction.Type: ApplicationFiled: July 1, 2013Publication date: November 19, 2015Inventors: Ikuo Ogawa, Ryoichi Kasahara, Toshiki Nishizawa, Yuji Mitsuhashi
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Patent number: 9182559Abstract: A light-receiving package for flat-plate mounting which can make monitor reception sensitivity of an optical signal constant without increasing the size of a module.Type: GrantFiled: December 4, 2012Date of Patent: November 10, 2015Assignees: NTT ELECTRONICS CORPORATION, NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Yuji Mitsuhashi, Toshiki Nishizawa, Ikuo Ogawa, Ryoichi Kasahara
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Patent number: 9116291Abstract: An objective is to provide an integrated optical module which can avoid positional change and separation of a PLC chip when humidity changes. Provided is an integrated optical module characterized in that the integrated optical module includes: a PLC chip; a seat bonded and fixed to part of a lower surface of the PLC chip with an adhesive which is applied to an adhesion surface of the seat; and a support portion supporting the seat, in which a water-repellent treatment portion is provided by masking an upper portion of the support portion with a water-repellent material. The water-repellent treatment portion is provided only around the seat for a predetermined width. The water-repellent treatment portion is provided around the seat for a width of 100 ?m or more.Type: GrantFiled: July 26, 2013Date of Patent: August 25, 2015Assignees: NIPPON TELEGRAPH AND TELEPHONE CORPORATION, NTT ELECTRONICS CORPORATIONInventors: Ryoichi Kasahara, Atsushi Aratake, Ikuo Ogawa, Yusuke Nasu, Yuichi Suzuki, Shunichi Soma
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Patent number: 9116317Abstract: In an integrated optical receiver or transmitter, both the displacement of an optical axis caused by thermal changes and the property degradation of an optical functional circuit are inhibited. A planar lightwave circuit having a substrate and a waveguide-type optical functional circuit formed thereon composed of a material different from that of the substrate, and includes a waveguide region formed only of an optical wavelength that is in contact with a side forming an emission-end face of the optical waveguide for propagating the light emitted from the optical functional circuit or an incident-end face of an optical waveguide for propagating the light incident on the optical functional circuit. The planar lightwave circuit is fixed to a fixing mount only at the bottom of the substrate where the waveguide region is formed.Type: GrantFiled: June 20, 2012Date of Patent: August 25, 2015Assignees: NIPPON TELEGRAPH AND TELEPHONE CORPORATION, NTT ELECTRONICS CORPORATIONInventors: Yusuke Nasu, Ryoichi Kasahara, Ikuo Ogawa, Kenya Suzuki, Fumihiro Ebisawa
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Publication number: 20150205042Abstract: In an integrated optical receiver or transmitter, both the displacement of an optical axis caused by thermal changes and the property degradation of an optical functional circuit are inhibited. A planar lightwave circuit having a substrate and a waveguide-type optical functional circuit formed thereon composed of a material different from that of the substrate, and includes a waveguide region formed only of an optical wavelength that is in contact with a side forming an emission-end face of the optical waveguide for propagating the light emitted from the optical functional circuit or an incident-end face of an optical waveguide for propagating the light incident on the optical functional circuit. The planar lightwave circuit is fixed to a fixing mount only at the bottom of the substrate where the waveguide region is formed.Type: ApplicationFiled: March 26, 2015Publication date: July 23, 2015Inventors: Yusuke Nasu, Ryoichi Kasahara, Ikuo Ogawa, Kenya Suzuki, Fumihiro Ebisawa
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Publication number: 20150192736Abstract: An objective is to provide an integrated optical module which can avoid positional change and separation of a PLC chip when humidity changes. Provided is an integrated optical module characterized in that the integrated optical module includes: a PLC chip; a seat bonded and fixed to part of a lower surface of the PLC chip with an adhesive which is applied to an upper surface of the seat; and a support portion supporting the seat, in which a groove where an adhesive overflowing from the upper surface of the seat is to stay is formed in an upper surface of the support portion at a portion surrounding the seat, the upper surface of the seat serving as an adhesion surface.Type: ApplicationFiled: July 26, 2013Publication date: July 9, 2015Inventors: Ryoichi Kasahara, Atsushi Aratake, Ikuo Ogawa, Yusuke Nasu, Yuichi Suzuki, Shunichi Soma
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Publication number: 20150183060Abstract: A method of manufacturing an optical module, comprising: mounting on a plane of a flat-plate-shaped base having a predetermined thickness: (a) an optical semiconductor package in which an active optical element is air-tightly sealed; (b) a waveguide optical element which wave-guides light from an optical fiber or to an optical fiber; and (c) an optical lens which connects the active optical element and the waveguide optical element; irradiating the plane with laser light at an angle close to horizontal to fix the optical lens using spot welding; covering the optical semiconductor package, the waveguide optical element, and the optical lens, with a frame-equipped lid having a bathtub shape; and fixing the frame-equipped lid onto the plane of the flat-plate-shaped base.Type: ApplicationFiled: March 9, 2015Publication date: July 2, 2015Inventors: Toshiki NISHIZAWA, Yuji MITSUHASHI, Ryoichi KASAHARA, Ikuo OGAWA
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Publication number: 20150177457Abstract: An objective is to provide an integrated optical module which can avoid positional change and separation of a PLC chip when humidity changes. Provided is an integrated optical module characterized in that the integrated optical module includes: a PLC chip; a seat bonded and fixed to part of a lower surface of the PLC chip with an adhesive which is applied to an adhesion surface of the seat; and a support portion supporting the seat, in which a water-repellent treatment portion is provided by masking an upper portion of the support portion with a water-repellent material. The water-repellent treatment portion is provided only around the seat for a predetermined width. The water-repellent treatment portion is provided around the seat for a width of 100 ?m or more.Type: ApplicationFiled: July 26, 2013Publication date: June 25, 2015Inventors: Ryoichi Kasahara, Atsushi Aratake, Ikuo Ogawa, Yusuke Nasu, Yuichi Suzuki, Shunichi Soma
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Patent number: 9002161Abstract: A low-cost optical module with highly consistent properties. The optical module includes, in a housing, an optical waveguide array, an optical functional element array, lens optics using one or a plurality of lenses for optically coupling the optical waveguide array and the optical functional element array, and a mirror disposed so as to convert the propagation direction of optical beams transmitted by the lens optics such that the optical beams are incident on the optical incidence ports of the optical functional element array. The optical functional element array is affixed to the housing, and the angle of the mirror is fixed in place after the angle of the mirror is adjusted such that the optical waveguide array and the optical functional element array are optically coupled.Type: GrantFiled: September 6, 2011Date of Patent: April 7, 2015Assignees: Nippon Telegraph and Telephone Corporation, NTT Electronics CorporationInventors: Ryoichi Kasahara, Ikuo Ogawa, Toshiki Nishizawa, Yuji Mitsuhashi
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Publication number: 20140369644Abstract: A light-receiving package for flat-plate mounting which can make monitor reception sensitivity of an optical signal constant without increasing the size of a module.Type: ApplicationFiled: December 4, 2012Publication date: December 18, 2014Applicants: NIPPON TELEGRAPH AND TELEPHONE CORPORTION, NTT ELECTRONICS CORPORATIONInventors: Yuji Mitsuhashi, Toshiki Nishizawa, Ikuo Ogawa, Ryoichi Kasahara
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Patent number: 8913889Abstract: An optical module for receiving light according to a digital coherent optical transmission scheme includes two optical fibers, and a monitor PD. The optical signal processing circuit includes a substrate, an optical waveguide layer made up of a core and a clad layer stacked on top of the substrate, and fixtures stacked on top of the clad layer on the one end, and is provided with a light shield member which spans the substrate, the clad layer, and the edge face of the fixture on the edge face of the optical signal processing circuit that faces the monitor PD, and which includes an aperture unit aligned with the given site where the diverted signal light is output.Type: GrantFiled: June 14, 2013Date of Patent: December 16, 2014Assignees: Nippon Telegraph and Telephone Corporation, NTT Electronics CorporationInventors: Ikuo Ogawa, Ryoichi Kasahara, Toshiki Nishizawa, Yuji Mitsuhashi
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Publication number: 20130336652Abstract: An optical module for receiving light according to a digital coherent optical transmission scheme includes two optical fibers, and a monitor PD. The optical signal processing circuit includes a substrate, an optical waveguide layer made up of a core and a clad layer stacked on top of the substrate, and fixtures stacked on top of the clad layer on the one end, and is provided with a light shield member which spans the substrate, the clad layer, and the edge face of the fixture on the edge face of the optical signal processing circuit that faces the monitor PD, and which includes an aperture unit aligned with the given site where the diverted signal light is output.Type: ApplicationFiled: June 14, 2013Publication date: December 19, 2013Inventors: Ikuo Ogawa, Ryoichi Kasahara, Toshiki Nishizawa, Yuji Mitsuhashi