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).
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Publication number: 20230359024Abstract: An optical device includes: a case; a wiring substrate that passes through the case and that includes an insulating member and a conductor; at least one of components including a first component configured to perform at least one of: outputting a light; receiving a light; and varying optical properties, and a second component configured to electrically control the first component, the at least one of components being housed in the case and flip-chip mounted on the wiring substrate.Type: ApplicationFiled: July 12, 2023Publication date: November 9, 2023Applicant: FURUKAWA ELECTRIC CO., LTD.Inventors: Atsushi IZAWA, Kazuya NAGASHIMA, Yozo ISHIKAWA, Yusuke INABA, Takuya KOKAWA
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Publication number: 20230288737Abstract: An optical module includes: a polarization controller that includes a main body including a polarization multiplexer and demultiplexer portion that, upon input of two kinds of light that are in perpendicularly-polarized states, performs polarization multiplexing on the two kinds of light and output polarization-multiplexed light, and upon input of light, performs polarization demultiplexing on the light and outputs two kinds of light that are in perpendicularly-polarized states, a first polarizer, a first input portion, a second input portion, a third input portion, a first output portion, and a second output portion; and an optical device configured to receive input of light via the polarization controller and output light via the polarization controller.Type: ApplicationFiled: May 17, 2023Publication date: September 14, 2023Applicants: FURUKAWA ELECTRIC CO., LTD., NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Kazuya NAGASHIMA, Yozo ISHIKAWA, Josuke OZAKI, Yasuaki HASHIZUME
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Patent number: 11722221Abstract: 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: GrantFiled: August 12, 2021Date of Patent: August 8, 2023Assignee: FURUKAWA ELECTRIC CO., LTD.Inventors: Kazuya Nagashima, Yozo Ishikawa, Atsushi Izawa
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Publication number: 20220365340Abstract: An optical module includes: an optical device; an array lens member that integrally includes a plurality of parallel lens units optically connected to the optical device; and a correction optical element configured to correct light that passes through the lens units.Type: ApplicationFiled: July 22, 2022Publication date: November 17, 2022Applicant: FURUKAWA ELECTRIC CO., LTD.Inventors: Kazuya NAGASHIMA, Yozo ISHIKAWA
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Publication number: 20220317392Abstract: An optical device includes: a case; a sleeve attached to the case, the sleeve including a first through-hole penetrating between an inside and an outside of the case, and an inclined surface inclined with respect to a penetrating direction of the first through-hole, the inclined surface having an opening of the first through-hole; a first optical fiber including a core wire including a core and a clad, and a sheath configured to surround the core wire, wherein an exposed portion of the core wire not surrounded by the sheath passes through the first through-hole; and a first joining material interposed and sealed between an outer peripheral surface of the exposed portion and an inner peripheral surface of the first through-hole in the first through-hole.Type: ApplicationFiled: June 21, 2022Publication date: October 6, 2022Applicant: FURUKAWA ELECTRIC CO., LTD.Inventors: Atsushi IZAWA, Jun MIYOKAWA, Maiko ARIGA, Kazuya NAGASHIMA, Yozo ISHIKAWA, Taketsugu SAWAMURA
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Publication number: 20210376931Abstract: 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: ApplicationFiled: August 12, 2021Publication date: December 2, 2021Applicant: FURUKAWA ELECTRIC CO., LTD.Inventors: Kazuya NAGASHIMA, Yozo ISHIKAWA, Atsushi IZAWA
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Publication number: 20210320719Abstract: 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: ApplicationFiled: June 23, 2021Publication date: October 14, 2021Applicant: FURUKAWA ELECTRIC CO., LTD.Inventors: Kazuya NAGASHIMA, Yozo ISHIKAWA, Atsushi IZAWA, Kazuki YAMAOKA
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Patent number: 9817192Abstract: 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: GrantFiled: March 7, 2017Date of Patent: November 14, 2017Assignee: FURUKAWA ELECTRIC CO., LTD.Inventors: Yoshinobu Nekado, Yozo Ishikawa, Naoya Nishimura, Toshinori Uemura, Hideyuki Nasu
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Patent number: 9729242Abstract: 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: GrantFiled: January 23, 2015Date of Patent: August 8, 2017Assignee: FURUKAWA ELECTRIC CO., LTD.Inventors: Kazuya Nagashima, Yozo Ishikawa
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Publication number: 20170192177Abstract: 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: ApplicationFiled: March 7, 2017Publication date: July 6, 2017Applicant: FURUKAWA ELECTRIC CO., LTD.Inventors: Yoshinobu NEKADO, Yozo ISHIKAWA, Naoya NISHIMURA, Toshinori UEMURA, Hideyuki NASU
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Patent number: 9632265Abstract: 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: GrantFiled: January 4, 2016Date of Patent: April 25, 2017Assignee: FURUKAWA ELECTRIC CO. LTD.Inventors: Yoshinobu Nekado, Yozo Ishikawa, Naoya Nishimura, Toshinori Uemura, Hideyuki Nasu
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Publication number: 20160218810Abstract: 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: ApplicationFiled: January 23, 2015Publication date: July 28, 2016Applicant: FURUKAWA ELECTRIC CO., LTD.Inventors: Kazuya NAGASHIMA, Yozo ISHIKAWA
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Publication number: 20160116695Abstract: 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: ApplicationFiled: January 4, 2016Publication date: April 28, 2016Applicant: Furukawa Electric Co., Ltd.Inventors: Yoshinobu NEKADO, Yozo ISHIKAWA, Naoya NISHIMURA, Toshinori UEMURA, Hideyuki NASU
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Patent number: 9122025Abstract: 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: GrantFiled: April 24, 2014Date of Patent: September 1, 2015Assignee: FURUKAWA ELECTRIC CO., LTD.Inventors: Yozo Ishikawa, Hideyuki Nasu
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Patent number: 9033593Abstract: 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: GrantFiled: August 7, 2013Date of Patent: May 19, 2015Assignee: FURUKAWA ELECTRIC CO., LTD.Inventors: Yozo Ishikawa, Hideyuki Nasu, Toshinori Uemura
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Publication number: 20140233897Abstract: 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: ApplicationFiled: April 24, 2014Publication date: August 21, 2014Applicant: FURUKAWA ELECTRIC CO.,LTD.Inventors: Yozo ISHIKAWA, Hideyuki NASU
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Publication number: 20130321662Abstract: 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: ApplicationFiled: August 7, 2013Publication date: December 5, 2013Applicant: FURUKAWA ELECTRIC CO., LTD.Inventors: Yozo ISHIKAWA, Hideyuki NASU, Toshinori UEMURA
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Publication number: 20130322834Abstract: 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: ApplicationFiled: August 7, 2013Publication date: December 5, 2013Applicant: FURUKAWA ELECTRIC CO., LTD.Inventors: Yozo ISHIKAWA, Hideyuki NASU, Toshinori UEMURA
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Patent number: 8366325Abstract: 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: GrantFiled: January 13, 2009Date of Patent: February 5, 2013Assignee: The Furukawa Electric Co., Ltd.Inventors: Yozo Ishikawa, Hideyuki Nasu
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Publication number: 20110049334Abstract: 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: ApplicationFiled: January 15, 2009Publication date: March 3, 2011Applicant: FURUKAWA ELECTRIC CO., LTD.Inventors: Hideyuki Nasu, Yozo Ishikawa