Patents by Inventor Yozo Ishikawa

Yozo Ishikawa 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).

  • Publication number: 20210376931
    Abstract: An optical module includes: photoelectric elements including first terminal groups; an integrated circuit including second terminal groups and ground terminals; a carrier substrate; a housing; and a common ground pad. Further, the carrier substrate is fixed to one surface of the housing, the carrier substrate includes signal wiring parts and a ground wiring part, the ground wiring part includes terminal pattern parts, a common pattern part, and a coupling part, each of the terminal pattern parts being disposed between the corresponding signal wiring parts and electrically connected with one of the ground terminals, the common pattern part being disposed on a side where the common ground pad is provided on the carrier substrate, the coupling part electrically connecting each terminal pattern part and the common pattern part, and the ground terminals of the integrated circuit are electrically connected with the common ground pad through the ground wiring part.
    Type: Application
    Filed: August 12, 2021
    Publication date: December 2, 2021
    Applicant: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Kazuya NAGASHIMA, Yozo ISHIKAWA, Atsushi IZAWA
  • Publication number: 20210320719
    Abstract: An optical module includes: a laser device; a wavelength detector; a modulator; a modulator driver; a coherent mixer; a photoelectric element; a transimpedance amplifier; and a casing. Further, the laser device is arranged such that the laser device outputs a laser light beam in a direction opposite to a side on which the optical output unit is arranged in the casing.
    Type: Application
    Filed: June 23, 2021
    Publication date: October 14, 2021
    Applicant: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Kazuya NAGASHIMA, Yozo ISHIKAWA, Atsushi IZAWA, Kazuki YAMAOKA
  • Patent number: 9817192
    Abstract: An optical module includes a housing including an internal space that has an opening in a substrate mounting surface, an element mounting surface that forms a portion of an inner surface of the internal space, and a waveguide introduction opening that is formed in a side surface intersecting the substrate mounting surface and is opened to the opening of the substrate mounting surface and communicated with the internal space, an optical element that is mounted on the element mounting surface, and an electronic element that is mounted on the element mounting surface and is connected to the optical element. When the substrate mounting surface is mounted on a circuit substrate, an optical waveguide that protrudes from a surface of the circuit substrate is introduced into the internal space through the waveguide introduction opening.
    Type: Grant
    Filed: March 7, 2017
    Date of Patent: November 14, 2017
    Assignee: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Yoshinobu Nekado, Yozo Ishikawa, Naoya Nishimura, Toshinori Uemura, Hideyuki Nasu
  • Patent number: 9729242
    Abstract: The present invention provides an optical module capable of achieving downsizing and high densification, and reducing crosstalk as compared to a conventional optical module. An optical module includes: an optical device including multiple light receiving elements; a control device which transmits and receives signals to and from the optical device; and a substrate including multiple lines which allow passage of the signals. Anode terminals of the multiple light receiving elements are connected to different lines by first wires, respectively. Cathode terminals of the multiple light receiving elements are connected to different lines by second wires, respectively. Each first wire and the corresponding second wire cross each other and are disposed out of contact with each other. The wires connecting each light receiving element and the control device, namely, the wires of each channel cross each other.
    Type: Grant
    Filed: January 23, 2015
    Date of Patent: August 8, 2017
    Assignee: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Kazuya Nagashima, Yozo Ishikawa
  • Publication number: 20170192177
    Abstract: An optical module includes a housing including an internal space that has an opening in a substrate mounting surface, an element mounting surface that forms a portion of an inner surface of the internal space, and a waveguide introduction opening that is formed in a side surface intersecting the substrate mounting surface and is opened to the opening of the substrate mounting surface and communicated with the internal space, an optical element that is mounted on the element mounting surface, and an electronic element that is mounted on the element mounting surface and is connected to the optical element. When the substrate mounting surface is mounted on a circuit substrate, an optical waveguide that protrudes from a surface of the circuit substrate is introduced into the internal space through the waveguide introduction opening.
    Type: Application
    Filed: March 7, 2017
    Publication date: July 6, 2017
    Applicant: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Yoshinobu NEKADO, Yozo ISHIKAWA, Naoya NISHIMURA, Toshinori UEMURA, Hideyuki NASU
  • Patent number: 9632265
    Abstract: An optical module includes a housing including an internal space that has an opening in a substrate mounting surface, an element mounting surface that forms a portion of an inner surface of the internal space, and a waveguide introduction opening that is formed in a side surface intersecting the substrate mounting surface and is opened to the opening of the substrate mounting surface and communicated with the internal space, an optical element that is mounted on the element mounting surface, and an electronic element that is mounted on the element mounting surface and is connected to the optical element. When the substrate mounting surface is mounted on a circuit substrate, an optical waveguide that protrudes from a surface of the circuit substrate is introduced into the internal space through the waveguide introduction opening.
    Type: Grant
    Filed: January 4, 2016
    Date of Patent: April 25, 2017
    Assignee: FURUKAWA ELECTRIC CO. LTD.
    Inventors: Yoshinobu Nekado, Yozo Ishikawa, Naoya Nishimura, Toshinori Uemura, Hideyuki Nasu
  • Publication number: 20160218810
    Abstract: The present invention provides an optical module capable of achieving downsizing and high densification, and reducing crosstalk as compared to a conventional optical module. An optical module includes: an optical device including multiple light receiving elements; a control device which transmits and receives signals to and from the optical device; and a substrate including multiple lines which allow passage of the signals. Anode terminals of the multiple light receiving elements are connected to different lines by first wires, respectively. Cathode terminals of the multiple light receiving elements are connected to different lines by second wires, respectively. Each first wire and the corresponding second wire cross each other and are disposed out of contact with each other. The wires connecting each light receiving element and the control device, namely, the wires of each channel cross each other.
    Type: Application
    Filed: January 23, 2015
    Publication date: July 28, 2016
    Applicant: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Kazuya NAGASHIMA, Yozo ISHIKAWA
  • Publication number: 20160116695
    Abstract: An optical module includes a housing including an internal space that has an opening in a substrate mounting surface, an element mounting surface that forms a portion of an inner surface of the internal space, and a waveguide introduction opening that is formed in a side surface intersecting the substrate mounting surface and is opened to the opening of the substrate mounting surface and communicated with the internal space, an optical element that is mounted on the element mounting surface, and an electronic element that is mounted on the element mounting surface and is connected to the optical element. When the substrate mounting surface is mounted on a circuit substrate, an optical waveguide that protrudes from a surface of the circuit substrate is introduced into the internal space through the waveguide introduction opening.
    Type: Application
    Filed: January 4, 2016
    Publication date: April 28, 2016
    Applicant: Furukawa Electric Co., Ltd.
    Inventors: Yoshinobu NEKADO, Yozo ISHIKAWA, Naoya NISHIMURA, Toshinori UEMURA, Hideyuki NASU
  • Patent number: 9122025
    Abstract: A prism/lens array (25) in the present invention is a grass prism having an approximately 45 degrees tapered part. A plurality of lenses (31) are provided side by side on the front surface of the prism/lens array (25). A pair of protrusions (33) are formed on both sides of lenses (31) on the surface on which the lenses (31) are provided. The protrusions (33) are formed in the top-bottom direction of the prism/lens array (25) and roughly V-shaped cross sections. Grooves (35) are provided in an inside surface of a prism-securing part (19), in areas corresponding to the protrusions (33). The grooves (35) are shaped such that the protrusions (33) can fit into the grooves; for example, the grooves could have roughly V-shaped cross sections.
    Type: Grant
    Filed: April 24, 2014
    Date of Patent: September 1, 2015
    Assignee: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Yozo Ishikawa, Hideyuki Nasu
  • Patent number: 9033593
    Abstract: An optical module which includes a housing having a placing portion and an optical input-output portion facing an optical input-output surface of a ferrule; a first fixing portion for fixing the ferrule to the housing in the direction of the Z-axis perpendicular to the placing portion; and a second fixing portion for fixing the ferrule to the housing in the direction of the Y-axis perpendicular to the optical input-output surface, wherein the second fixing portion can change states from the first state to the second state; the first fixing portion fixes the ferrule in the direction of the Z-axis, and does not fix the ferrule in the Z-axis direction when the first fixing portion is at a second position; and the first fixing portion moves from the second position to the first position when the second fixing portion changes its state to a specific state.
    Type: Grant
    Filed: August 7, 2013
    Date of Patent: May 19, 2015
    Assignee: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Yozo Ishikawa, Hideyuki Nasu, Toshinori Uemura
  • Publication number: 20140233897
    Abstract: A prism/lens array (25) in the present invention is a grass prism having an approximately 45 degrees tapered part. A plurality of lenses (31) are provided side by side on the front surface of the prism/lens array (25). A pair of protrusions (33) are formed on both sides of lenses (31) on the surface on which the lenses (31) are provided. The protrusions (33) are formed in the top-bottom direction of the prism/lens array (25) and roughly V-shaped cross sections. Grooves (35) are provided in an inside surface of a prism-securing part (19), in areas corresponding to the protrusions (33). The grooves (35) are shaped such that the protrusions (33) can fit into the grooves; for example, the grooves could have roughly V-shaped cross sections.
    Type: Application
    Filed: April 24, 2014
    Publication date: August 21, 2014
    Applicant: FURUKAWA ELECTRIC CO.,LTD.
    Inventors: Yozo ISHIKAWA, Hideyuki NASU
  • Publication number: 20130322834
    Abstract: An optical module which includes a housing having a placing portion and an optical input-output portion facing an optical input-output surface of a ferrule; a first fixing portion for fixing the ferrule to the housing in the direction of the Z-axis perpendicular to the placing portion; and a second fixing portion for fixing the ferrule to the housing in the direction of the Y-axis perpendicular to the optical input-output surface, wherein the second fixing portion can change states from the first state to the second state; the first fixing portion fixes the ferrule in the direction of the Z-axis, and does not fix the ferrule in the Z-axis direction when the first fixing portion is at a second position; and the first fixing portion moves from the second position to the first position when the second fixing portion changes its state to a specific state.
    Type: Application
    Filed: August 7, 2013
    Publication date: December 5, 2013
    Applicant: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Yozo ISHIKAWA, Hideyuki NASU, Toshinori UEMURA
  • Publication number: 20130321662
    Abstract: A gesture recognition system includes an image capturing device, a memory unit and a processing unit. The image capturing device includes a zoom lens and captures an image frame with a focus length. The memory unit previously saves a lookup table of depths versus sharpness associated with at least one the focus length of the zoom lens. The processing unit is configured to calculate a current sharpness value of at least one object image in the image frame and to obtain a current depth of the object image according to the lookup table.
    Type: Application
    Filed: August 7, 2013
    Publication date: December 5, 2013
    Applicant: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Yozo ISHIKAWA, Hideyuki NASU, Toshinori UEMURA
  • Patent number: 8366325
    Abstract: An optical module 10 according to the invention is comprised of: a substrate 11; a laser diode array 14 implemented on said substrate in an array; a driver IC 15 implemented on said substrate and electrically connected to each of surface emitting semiconductor laser elements of the laser diode array 14; an optical connector unit 12 for holding a plurality of optical fiber 16 in an array, wherein the optical connector unit 12 is fixed to the substrate 11 in a location where center of each single end of said plurality of optical fiber and center of each light injecting region are aligned with each other; and a cover 13. The optical connector unit 12 includes two guide-pin holes 12b on two opposite sides of a plurality of fiber holding hole 12a. Two alignment marks 50 are provided on a surface 11a of the substrate 11, which are visually recognizable through each of the guide-pin holes 12b, and function as alignment reference of said optical connector unit 12.
    Type: Grant
    Filed: January 13, 2009
    Date of Patent: February 5, 2013
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Yozo Ishikawa, Hideyuki Nasu
  • Publication number: 20110049334
    Abstract: An optical module transmits optical signals through a plurality of optical fibers in parallel. The optical module includes a substrate including an electrode pattern, a plurality of optical elements mounted on the electrode pattern of the substrate, and an electronic device mounted on the electrode pattern of the substrate and electrically connected to the optical elements. The optical elements and the electronic device are arranged on the substrate close to each other such that lengths of a plurality of transmission lines each transmitting a signal between each of the optical elements and the electronic device are minimized.
    Type: Application
    Filed: January 15, 2009
    Publication date: March 3, 2011
    Applicant: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Hideyuki Nasu, Yozo Ishikawa
  • Publication number: 20090269006
    Abstract: An optical module 10 according to the invention is comprised of: a substrate 11; a laser diode array 14 implemented on said substrate in an array; a driver IC 15 implemented on said substrate and electrically connected to each of surface emitting semiconductor laser elements of the laser diode array 14; an optical connector unit 12 for holding a plurality of optical fiber 16 in an array, wherein the optical connector unit 12 is fixed to the substrate 11 in a location where center of each single end of said plurality of optical fiber and center of each light injecting region are aligned with each other; and a cover 13. The optical connector unit 12 includes two guide-pin holes 12b on two opposite sides of a plurality of fiber holding hole 12a. Two alignment marks 50 are provided on a surface 11a of the substrate 11, which are visually recognizable through each of the guide-pin holes 12b, and function as alignment reference of said optical connector unit 12.
    Type: Application
    Filed: January 13, 2009
    Publication date: October 29, 2009
    Applicant: THE FURUKAWA ELECTRIC CO., LTD.
    Inventors: Yozo Ishikawa, Hideyuki Nasu
  • Publication number: 20090032984
    Abstract: A method for manufacturing optical fibers with filter, wherein a multilayer-film filter is formed at end face of the optical fibers, comprising a process for fixing each of the optical fibers on a fixing jig, a process for polishing the end face of the optical fiber fixed on said fixing jig, a process for film-forming a filter on the end face of the optical fibers after polishing, and a process for taking out said optical fibers from said fixing jigs, respectively, wherein said process for film-forming the filter is performed by forming a fiber bundle in which a plural number of optical fibers after polishing, on which the filter has been film-formed, are tied such that all polished planes are aligned at the end face.
    Type: Application
    Filed: July 9, 2008
    Publication date: February 5, 2009
    Applicant: THE FURUKAWA ELECTRIC CO., LTD.
    Inventors: Masayuki Iwase, Atsushi Izawa, Yozo Ishikawa
  • Patent number: 7412148
    Abstract: An optical component provided with a waveguide groove having, an waveguide holding plane having a surface shape extending along a specified axial direction and capable of holding at least one optical waveguide while positioning it at at least a part of at least one side face thereof; and an opening extending substantially oppositely to the waveguide holding plane and being smaller in width than the outside diameter of at least one optical waveguide in a specified widthwise direction perpendicular to the specified axial direction.
    Type: Grant
    Filed: October 17, 2003
    Date of Patent: August 12, 2008
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Masayuki Iwase, Atsushi Izawa, Yozo Ishikawa
  • Publication number: 20060188211
    Abstract: An optical component is disclosed, which comprises a waveguide groove, having: a waveguide holding plane having a surface shape extending along a specific axial direction and capable of holding at least one optical waveguide while positioning it at at least a part of at least one side face thereof; and an opening portion extending substantially oppositely to the waveguide holding plane and being smaller in width than the outside diameter of at least the one optical waveguide in a specified widthwise direction perpendicular to the specified axial direction.
    Type: Application
    Filed: October 17, 2003
    Publication date: August 24, 2006
    Applicant: The Furukawa Electric Co. LTD.
    Inventors: Masayuki Iwase, Atsushi Izaka, Yozo Ishikawa
  • Publication number: 20020054410
    Abstract: An electronic apparatus according to the present invention is provided with an optical transmitter, an optical receiver, and a connection part capable of connection to and disconnection from a connection part of another electronic apparatus, and has an internal space in the connection part, which is configured, when the connection part is connected to the connection part of the other electronic apparatus, to communicate with an internal space of the connection part of the other electronic apparatus, constituting a light transmitting space between the two electronic apparatuses, and a shielding mechanism provided at an opening of the connection part, which is configured, when the connection part is connected to the connection part of the other electronic apparatus, to open the opening, allowing an optical signal to be transmitted in the light transmitting space, and when the connection part is not connected to the connection part of the other electronic apparatus, to close the opening, effecting a shielding no
    Type: Application
    Filed: July 9, 2001
    Publication date: May 9, 2002
    Inventors: Yozo Ishikawa, Masayuki Iwase