Patents by Inventor Mitsuaki Tamura

Mitsuaki Tamura 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: 9348089
    Abstract: An optical module (1) of the invention includes a circuit substrate (24) on which light receiving and emitting elements (52) are mounted, a connector component (54) for holding optical fibers (7), and a lens array component (55) which is fixed on the circuit substrate (24) and optically connects the optical fibers (7) to the light receiving and emitting elements (52) on the circuit substrate (24), and the circuit substrate (24) has a lens array mounting region (A1) in which the lens array component (55) is fixed and a connector component opposed region (A2) opposed to the connector component (54), and thermal insulation space is formed between the connector component (54) and the connector component opposed region (A2).
    Type: Grant
    Filed: December 20, 2012
    Date of Patent: May 24, 2016
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Hajime Arao, Toshihisa Yokochi, Atsushi Suzuki, Mitsuaki Tamura
  • Patent number: 9046671
    Abstract: A composite optical fiber cable has coated optical fibers and electric wires disposed inside a sheath. The optical fibers are enclosed within a first protective tube that is situated at the cross-sectional center, while the electric wires are disposed between the first protective tube and the sheath, and are capable of moving in the circumferential direction of the first protective tube. A composite optical fiber cable assembly includes a composite optical fiber cable and a connector attached to the cable. Inside the connector, a wiring portion for wiring the optical fiber to a ferrule and a wiring portion for wiring the electric wire to an electric terminal are disposed within a common space S inside a housing, and at least the wiring portion of the optical fiber which lies inside the space S is covered by a second protective tube.
    Type: Grant
    Filed: May 10, 2011
    Date of Patent: June 2, 2015
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventor: Mitsuaki Tamura
  • Patent number: 9046664
    Abstract: The object of this invention is to provide an optical connector module 1 in which the possibility of scraped wastes to exist between the lens and the tip face of the optical fiber is less and which has high optical coupling efficiency. The optical connector module 1 comprises: an optical fiber 2 having a core 2a and a plastic cladding 2b made of a first resin; a positioning device 3 made of a second resin and including a fixing portion 4 in which the optical fiber 2 is inserted; and a lens 5, wherein the hardness of the second resin is higher than that of the first resin. The tip face 2ac of a glass core 2a may protrude from the tip face 2bc of the cladding 2b toward the bottom face 4c, or otherwise the tip face 2bc of the cladding 2b may protrude from the tip face 2ac of the glass core 2a toward the bottom face 4c.
    Type: Grant
    Filed: May 12, 2011
    Date of Patent: June 2, 2015
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Mitsuaki Tamura, Osamu Shimakawa
  • Patent number: 8985873
    Abstract: A connector component is provided as one compatible with conductor coupling and fiber coupling. A receptacle 1 is a connector component to be coupled to a USB connector 3 incorporating a plurality of conductor wires, and a ferrule 4 holding distal ends of optical fibers, and is provided with connections 18 to be connected to the plurality of conductor wires, a light emitting device 23 to emit light toward the ferrule 4, and a light receiving device 24 to receive light emitted from the ferrule 4.
    Type: Grant
    Filed: August 8, 2013
    Date of Patent: March 24, 2015
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Wataru Sakurai, Mitsuaki Tamura
  • Patent number: 8939659
    Abstract: A connector component is provided as one compatible with conductor coupling and fiber coupling. A receptacle 1 is a connector component to be coupled to a USB connector 3 incorporating a plurality of conductor wires, and a ferrule 4 holding distal ends of optical fibers, and is provided with connections 18 to be connected to the plurality of conductor wires, a light emitting device 23 to emit light toward the ferrule 4, and a light receiving device 24 to receive light emitted from the ferrule 4.
    Type: Grant
    Filed: August 8, 2013
    Date of Patent: January 27, 2015
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Wataru Sakurai, Mitsuaki Tamura
  • Publication number: 20150016772
    Abstract: An optical module (1) of the invention includes a circuit substrate (24) on which light receiving and emitting elements (52) are mounted, a connector component (54) for holding optical fibers (7), and a lens array component (55) which is fixed on the circuit substrate (24) and optically connects the optical fibers (7) to the light receiving and emitting elements (52) on the circuit substrate (24), and the circuit substrate (24) has a lens array mounting region (A1) in which the lens array component (55) is fixed and a connector component opposed region (A2) opposed to the connector component (54), and thermal insulation space is formed between the connector component (54) and the connector component opposed region (A2).
    Type: Application
    Filed: December 20, 2012
    Publication date: January 15, 2015
    Inventors: Hajime Arao, Toshihisa Yokochi, Atsushi Suzuki, Mitsuaki Tamura
  • Patent number: 8646991
    Abstract: A connector component is provided as one compatible with conductor coupling and fiber coupling. A receptacle 1 is a connector component to be coupled to a USB connector 3 incorporating a plurality of conductor wires, and a ferrule 4 holding distal ends of optical fibers, and is provided with connections 18 to be connected to the plurality of conductor wires, a light emitting device 23 to emit light toward the ferrule 4, and a light receiving device 24 to receive light emitted from the ferrule 4.
    Type: Grant
    Filed: April 22, 2011
    Date of Patent: February 11, 2014
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Wataru Sakurai, Mitsuaki Tamura
  • Publication number: 20130322831
    Abstract: A connector component is provided as one compatible with conductor coupling and fiber coupling. A receptacle 1 is a connector component to be coupled to a USB connector 3 incorporating a plurality of conductor wires, and a ferrule 4 holding distal ends of optical fibers, and is provided with connections 18 to be connected to the plurality of conductor wires, a light emitting device 23 to emit light toward the ferrule 4, and a light receiving device 24 to receive light emitted from the ferrule 4.
    Type: Application
    Filed: August 8, 2013
    Publication date: December 5, 2013
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventors: Wataru SAKURAI, Mitsuaki Tamura
  • Publication number: 20130299683
    Abstract: An optical connecting member includes a board chip, an optical element mounted on the board chip, and a lens member including a lens part optically connected to the optical element. An accommodating space for accommodating the optical element is formed between the lens member and the board chip. The accommodating space communicates with the outside only through a very small communicating part.
    Type: Application
    Filed: May 9, 2013
    Publication date: November 14, 2013
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventors: Mitsuaki Tamura, Michiko HARUMOTO, Takayuki SHIMAZU, Masaki OYAGI
  • Patent number: 8491197
    Abstract: There is provided an optical connector module in which an adhesive is interposed between a lens and a distal surface of an optical fiber, wherein the module includes a transparent positioning device and an optical fiber fixed in the positioning device. The positioning device has a lens provided to an end surface, a concave insertion portion into which the optical fiber is inserted and which is disposed so that the bottom surface in contact with the distal surface of the optical fiber is positioned opposite the lens, and a debris receiving portion that extends from the bottom surface in a radial direction of the optical fiber and has a surface continuous with the bottom surface.
    Type: Grant
    Filed: April 15, 2011
    Date of Patent: July 23, 2013
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Mitsuaki Tamura, Osamu Shimakawa
  • Patent number: 8480311
    Abstract: An optical connector in which works of attaching an incorporated optical fiber to a ferrule, removing a coating of the tip end side of a coated optical fiber, and attaching an optical connector to the coated optical fiber can be made more efficient, and the transmission characteristics can be prevented from being lowered in the optical connector, and a method of attaching the optical connector to a coated optical fiber are provided. An optical connector 101 includes: a ferrule 140 into which a glass fiber 121 that is obtained by peeling a coating 124 of a coated optical fiber 120 is to be inserted; a fixing portion 130 which fixes the coated optical fiber 120 inserted into the ferrule 140; and a coating-removing portion 110 which removes the coating 124 from an end portion of the coated optical fiber 120, by means of a force of inserting the coated optical fiber 120 into the optical connector 101.
    Type: Grant
    Filed: October 24, 2008
    Date of Patent: July 9, 2013
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Kenichiro Ohtsuka, Masahiro Hamada, Masaki Ohmura, Mitsuaki Tamura, Mitsuru Kihara, Ryo Koyama, Hitoshi Son
  • Patent number: 8388238
    Abstract: A method of producing an optical waveguide connector in which the productivity of a ferrule member can be improved, and the connection loss with a counter connector can be suppressed to a low level is obtained. An optical waveguide connector 11 is obtained by performing: an aligning step of restricting the position of the tip end of an optical waveguide 2 passed through an insertion hole 13b of a ferrule member 13, by a positioning portion of a positioning member 16 which is opposedly placed at the tip end of the ferrule member 13, thereby aligning the optical waveguide 2 to the ferrule member 13; and a bonding step of filing a gap between the optical waveguide 2 which is passed through the insertion hole 13b, and the insertion hole 13b, with an adhesive agent to fix the optical waveguide 2 to the ferrule member 13.
    Type: Grant
    Filed: October 5, 2007
    Date of Patent: March 5, 2013
    Assignees: Sumitomo Electric Industries, Ltd., NEC Corporation
    Inventors: Masaki Ohmura, Mitsuaki Tamura, Hikaru Kouta, Kaichiro Nakano, Hideyuki Ono, Chiemi Tanaka
  • Patent number: 8292514
    Abstract: To provide an optical connecting member capable of positioning and connecting a coated fiber by a simple connecting work with high precision, and a method of fitting the same.
    Type: Grant
    Filed: November 14, 2008
    Date of Patent: October 23, 2012
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Kenichiro Ohtsuka, Masaki Ohmura, Mitsuaki Tamura, Masahiro Hamada, Mitsuru Kihara, Ryo Koayama
  • Patent number: 8235603
    Abstract: An object is to obtain a module in which an optical fiber can be inserted after a ferrule has been mounted on a circuit board. There is provided an optical module (100) in which at least a ferrule (33) and an electric component (57) are mounted on a circuit board (35) on which external electrodes (63) have been mounted; a fiber through-hole is formed in the ferrule (33) in a position in which the optoelectric conversion device (31) is mounted on one end surface and that corresponds to an active layer of an optoelectric conversion device (31); and the optoelectric conversion device (31) of the ferrule (33) is electrically connected to the electric component (57). In the ferrule (33), an opening in the one end face of the fiber through-hole that faces the optoelectric conversion device (31) is blocked by a transparent substance (61), and a portion that excludes the fiber through-hole at the other end surface is are monolithically covered with a molding resin (55).
    Type: Grant
    Filed: March 19, 2009
    Date of Patent: August 7, 2012
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Mitsuaki Tamura, Wataru Sakurai, Hideki Matsubara, Hideaki Toshioka, Kyouichirou Nakatsugi, Masahiro Adachi, Yasuhiro Okuda
  • Patent number: 8196793
    Abstract: There are provided an optical fiber cutting method and a cutting apparatus which can easily cut a coated optical fiber without a step of removing a coating from the optical fiber. It includes a clamp which holds the coated optical fiber, having a glass fiber and the coating, on both sides of a portion-to-be-cut, a disk-shaped blade member which moves at the portion-to-be-cut in a direction orthogonal to an axis of the optical fiber to cut the coating and to provide a slit into the glass fiber, and a support which presses, with a predetermined pressing force, the portion-to-be-cut from an opposite side of the blade member with respect to the portion-to-be-cut when cutting the coating and providing the slit into the glass fiber. A head of the support is formed with a groove along a sliding direction of the blade member.
    Type: Grant
    Filed: October 4, 2007
    Date of Patent: June 12, 2012
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Masaki Ohmura, Kenichiro Ohtsuka, Mitsuaki Tamura
  • Patent number: 8164043
    Abstract: An optical module is configured such that it is not susceptible to fine particulate matter when an optical fiber is inserted into a fiber insertion hole thereof. The optical module is also configured to prevent any reduction in the optical coupling efficiency and degradation of anti-noise properties with the optical fiber. The optical module includes: a ferrule, having the fiber insertion hole formed on an end surface on which an electrical circuit is formed; a photoelectric conversion element, connected to the electrical circuit and facing the fiber insertion hole; and an optical fiber, optically coupled directly with the photoelectric conversion element. The optical fiber has a glass fiber and a protective coating, and is aligned with the insertion hole with the protective coating interposed therebetween. The optical fiber is retained in the insertion hole with the glass fiber not in contact with the insertion hole.
    Type: Grant
    Filed: November 21, 2008
    Date of Patent: April 24, 2012
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Mitsuaki Tamura, Wataru Sakurai
  • Publication number: 20110280527
    Abstract: A composite optical fiber cable has coated optical fibers and electric wires disposed inside a sheath. The optical fibers are enclosed within a first protective tube that is situated at the cross-sectional center, while the electric wires are disposed between the first protective tube and the sheath, and are capable of moving in the circumferential direction of the first protective tube. A composite optical fiber cable assembly includes a composite optical fiber cable and a connector attached to the cable. Inside the connector, a wiring portion for wiring the optical fiber to a ferrule and a wiring portion for wiring the electric wire to an electric terminal are disposed within a common space S inside a housing, and at least the wiring portion of the optical fiber which lies inside the space S is covered by a second protective tube.
    Type: Application
    Filed: May 10, 2011
    Publication date: November 17, 2011
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventor: Mitsuaki TAMURA
  • Publication number: 20110280522
    Abstract: The object of this invention is to provide an optical connector module 1 in which the possibility of scraped wastes to exist between the lens and the tip face of the optical fiber is less and which has high optical coupling efficiency. The optical connector module 1 comprises: an optical fiber 2 having a core 2a and a plastic cladding 2b made of a first resin; a positioning device 3 made of a second resin and including a fixing portion 4 in which the optical fiber 2 is inserted; and a lens 5, wherein the hardness of the second resin is higher than that of the first resin. The tip face 2ac of a glass core 2a may protrude from the tip face 2bc of the cladding 2b toward the bottom face 4c, or otherwise the tip face 2bc of the cladding 2b may protrude from the tip face 2ac of the glass core 2a toward the bottom face 4c.
    Type: Application
    Filed: May 12, 2011
    Publication date: November 17, 2011
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Mitsuaki TAMURA, Osamu SHIMAKAWA
  • Publication number: 20110262082
    Abstract: A connector component is provided as one compatible with conductor coupling and fiber coupling. A receptacle 1 is a connector component to be coupled to a USB connector 3 incorporating a plurality of conductor wires, and a ferrule 4 holding distal ends of optical fibers, and is provided with connections 18 to be connected to the plurality of conductor wires, a light emitting device 23 to emit light toward the ferrule 4, and a light receiving device 24 to receive light emitted from the ferrule 4.
    Type: Application
    Filed: April 22, 2011
    Publication date: October 27, 2011
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Wataru SAKURAI, Mitsuaki TAMURA
  • Publication number: 20110262083
    Abstract: There is provided an optical connector module in which an adhesive is interposed between a lens and a distal surface of an optical fiber, wherein the module includes a transparent positioning device and an optical fiber fixed in the positioning device. The positioning device has a lens provided to an end surface, a concave insertion portion into which the optical fiber is inserted and which is disposed so that the bottom surface in contact with the distal surface of the optical fiber is positioned opposite the lens, and a debris receiving portion that extends from the bottom surface in a radial direction of the optical fiber and has a surface continuous with the bottom surface.
    Type: Application
    Filed: April 15, 2011
    Publication date: October 27, 2011
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Mitsuaki TAMURA, Osamu SHIMAKAWA