Patents by Inventor Takashi Takaoka

Takashi Takaoka 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: 11092465
    Abstract: An optical encoder includes first, second, and third light receiving elements (A, B, C) that are sequentially disposed and adjacent to each other; and a detection signal generation unit (50) that outputs a detection trigger (Ts) when an output level of the second light receiving element (B) that receives incident light after the first light receiving element (A) is higher than an output level of the first light receiving element A, and outputs a non-detection trigger (Te) when an output level of the third light receiving element (C) that receives incident light after the second light receiving element (B) is higher than the output level of the second light receiving element (B).
    Type: Grant
    Filed: February 20, 2015
    Date of Patent: August 17, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Norikazu Okada, Masaki Tsuji, Toshiyuki Takada, Katsunori Satoh, Takashi Takaoka
  • Publication number: 20170199272
    Abstract: An optical reflection sensor includes a light emitting element that irradiates a distance measuring target with light, a light receiving optical system that condenses reflected light from the distance measuring target, a light receiving element that receives light condensed by the light receiving optical system and outputs a photoelectric current signal corresponding to a light receiving position, and a signal processing circuit that obtains light receiving position information on the light receiving element and time-of-flight information of the light, which is a duration from when the light is emitted by the light emitting element to when the light is reflected by the distance measuring target and received by the light receiving element, on the basis of the photoelectric current signal output from the light receiving element.
    Type: Application
    Filed: May 21, 2015
    Publication date: July 13, 2017
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Takashi TAKAOKA, Norikazu OKADA, Toshiyuki TAKADA, Masaki TSUJI, Katsunori SATOH
  • Publication number: 20170045381
    Abstract: An optical encoder includes first, second, and third light receiving elements (A, B, C) that are sequentially disposed and adjacent to each other; and a detection signal generation unit (50) that outputs a detection trigger (Ts) when an output level of the second light receiving element (B) that receives incident light after the first light receiving element (A) is higher than an output level of the first light receiving element A, and outputs a non-detection trigger (Te) when an output level of the third light receiving element (C) that receives incident light after the second light receiving element (B) is higher than the output level of the second light receiving element (B).
    Type: Application
    Filed: February 20, 2015
    Publication date: February 16, 2017
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Norikazu OKADA, Masaki TSUJI, Toshiyuki TAKADA, Katsunori SATOH, Takashi TAKAOKA
  • Publication number: 20080049210
    Abstract: In one embodiment of the range-finding sensor of the invention, a light-emitting element that projects light to a range-finding subject, and a light-receiving element that receives reflected light reflected by the range-finding subject, are disposed on a reference face, and the light-emitting element and the light-receiving element are each individually sealed with resin by a translucent resin sealing portion. Further, the outer circumference of the translucent resin sealing portion is covered by an opaque resin sealing portion, and the opaque resin sealing portion is provided with a light-emitting portion slit that constricts the luminous flux of light projected to the range-finding subject, and a light-receiving portion slit that constricts the luminous flux of reflected light reflected by the range-finding subject.
    Type: Application
    Filed: August 15, 2007
    Publication date: February 28, 2008
    Inventor: Takashi Takaoka
  • Patent number: 7119912
    Abstract: A ranging sensor includes: a light emitting element; a projection lens for projecting light emitted from the light emitting element to an object; a condenser lens for condensing light reflected from the object; and a light receiving element, provided at the light condensing position of the condenser lens, for transmitting an output signal which varies according to the position of the object by receiving the reflected light at the light receiving surface thereof, wherein the condenser lens is held by a holding member so that the condenser lens is movable in a predetermined direction. Consequently, it becomes possible to easily adjust the output.
    Type: Grant
    Filed: June 16, 2003
    Date of Patent: October 10, 2006
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Takashi Takaoka
  • Patent number: 6844562
    Abstract: A distance measuring sensor includes a case subassembly having inside a light emitting element and a light receiving element, and a lens case subassembly having a projection lens projecting a light output from the light emitting element and a condenser lens condensing the light reflected from the object, and attached to a front side of the case subassembly. The condenser lens is movably attached to the lens case subassembly, and after an output is adjusted, this condenser lens is fixed thereto. Thus, the distance measuring sensor enabling easier adjustment of an output can be provided.
    Type: Grant
    Filed: February 7, 2003
    Date of Patent: January 18, 2005
    Assignee: Sharp Kabuskiki Kaisha
    Inventors: Takashi Takaoka, Shinya Kawanishi
  • Publication number: 20040257555
    Abstract: A distance measuring sensor includes an LED emitting light, a projection lens receiving the light from the LED to direct the light to illuminate an object, a light receiving lens collecting light reflected by the object, and a PSD receiving at a location light collected by the light receiving lens to output a signal corresponding to the location. The light receiving lens and the PSD are configured to have an adjustable distance therebetween, as seen along an optical axis from the light receiving lens to the PSD. A distance measuring device and electronics equipped therewith can thus be obtained that can rapidly provide information on a distance of an object over a wide range and be configured of a reduced number of components.
    Type: Application
    Filed: June 22, 2004
    Publication date: December 23, 2004
    Inventors: Takashi Takaoka, Shinya Kawanishi
  • Patent number: 6726491
    Abstract: A Jack connector includes: a retainer which holds a semiconductor optical device and an electrical connection terminals; wherein the electrical connection terminals each extend out of the retainer so as to be soldered onto a board; wherein the retainer has recesses provided in a vicinity of the respective terminals so as to accommodate a solder possibly creeping up along the terminals when the jack connector is soldered onto the board.
    Type: Grant
    Filed: August 30, 2001
    Date of Patent: April 27, 2004
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takahiko Nakano, Takashi Takaoka, Mitsuhisa Ikuta
  • Publication number: 20040001193
    Abstract: A distance measuring sensor includes a case subassembly having inside a light emitting element and a light receiving element, and a lens case subassembly having a projection lens projecting a light output from the light emitting element and a condenser lens condensing the light reflected from the object, and attached to a front side of the case subassembly. The condenser lens is movably attached to the lens case subassembly, and after an output is adjusted, this condenser lens is fixed thereto. Thus, the distance measuring sensor enabling easier adjustment of an output can be provided.
    Type: Application
    Filed: June 16, 2003
    Publication date: January 1, 2004
    Inventor: Takashi Takaoka
  • Publication number: 20030184725
    Abstract: A distance measuring sensor includes a case subassembly having inside a light emitting element and a light receiving element, and a lens case subassembly having a projection lens projecting a light output from the light emitting element and a condenser lens condensing the light reflected from the object, and attached to a front side of the case subassembly. The condenser lens is movably attached to the lens case subassembly, and after an output is adjusted, this condenser lens is fixed thereto. Thus, the distance measuring sensor enabling easier adjustment of an output can be provided.
    Type: Application
    Filed: February 7, 2003
    Publication date: October 2, 2003
    Inventors: Takashi Takaoka, Shinya Kawanishi
  • Patent number: 6481902
    Abstract: A light transmission device includes an optical fiber cable having a plug and a holder having a plug insertion hole into which the plug of the optical fiber cable is inserted, wherein an engaging projection is provided on an outer surface of the plug, an engaging groove corresponding with the projection is provided on a wall of the plug insertion hole, and a shutter for closing the plug insertion hole is provided, the shutter being opened and closed in the inside of the plug insertion hole by turning about a pivot extending substantially vertically or parallel to a line composed of an optional point in the groove and a point on a wall of the plug insertion hole rightly opposite to the optional point.
    Type: Grant
    Filed: February 23, 2001
    Date of Patent: November 19, 2002
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takashi Takaoka, Mitsuhisa Ikuta
  • Publication number: 20020028601
    Abstract: A Jack connector includes: a retainer which holds a semiconductor optical device and an electrical connection terminals; wherein the electrical connection terminals each extend out of the retainer so as to be soldered onto a board; wherein the retainer has recesses provided in a vicinity of the respective terminals so as to accommodate a solder possibly creeping up along the terminals when the jack connector is soldered onto the board.
    Type: Application
    Filed: August 30, 2001
    Publication date: March 7, 2002
    Inventors: Takahiko Nakano, Takashi Takaoka, Mitsuhisa Ikuta
  • Publication number: 20010017966
    Abstract: A light transmission device includes an optical fiber cable having a plug and a holder having a plug insertion hole into which the plug of the optical fiber cable is inserted, wherein an engaging projection is provided on an outer surface of the plug, an engaging groove corresponding with the projection is provided on a wall of the plug insertion hole, and a shutter for closing the plug insertion hole is provided, the shutter being opened and closed in the inside of the plug insertion hole by turning about a pivot extending substantially vertically or parallel to a line composed of an optional point in the groove and a point on a wall of the plug insertion hole rightly opposite to the optional point.
    Type: Application
    Filed: February 23, 2001
    Publication date: August 30, 2001
    Inventors: Takashi Takaoka, Mitsuhisa Ikuta
  • Patent number: 4969141
    Abstract: An optical disc memory for optically storing and retrieving information formed of a substrate and a recording layer supported on the substrate. The recording layer has a chemically stable dielectric material and a semiconductor which has an optical property that changes reversibly as a function of the intensity of a laser beam applied through the substrate. A multilayered optical disc memory having a substrate, a recording layer formed on the substrate and a metallic layer formed on the recording layer, and a method of optically storing and retrieving information by using the above-described optical disc memory, are also disclosed.
    Type: Grant
    Filed: April 18, 1989
    Date of Patent: November 6, 1990
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takashi Takaoka, Kiyoshi Tsuboi, deceased
  • Patent number: 4682321
    Abstract: An optical disk for recording information, comprising a substrate and a plurality of thin film layers disposed on said substrate, each film having different optical extinction coefficient from that is the others. The thin film layers can be converted into a single layer when irradiated with a recording beam.
    Type: Grant
    Filed: January 24, 1985
    Date of Patent: July 21, 1987
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takashi Takaoka, Satoru Koyahara, Tetsuo Saito
  • Patent number: 4655878
    Abstract: A method of regulating fuel for a coke oven by a programmed heating method in which a change of the fuel supply rate contains at least one substantial reduction during the coal carbonization process in the coke oven, wherein the improvement comprises setting up a standard curve for the ethylene concentration or the tar concentration based on the operating conditions of the coke oven and the conditions of feed coal, measuring the ethylene concentration or the tar concentration in the coke oven gas generated in the carbonization chamber, and controlling the fuel supply rate so as to minimize the difference between the measured value and the standard value.
    Type: Grant
    Filed: November 7, 1984
    Date of Patent: April 7, 1987
    Assignee: Mitsubishi Chemical Industries, Ltd.
    Inventors: Yoshio Yoshino, Koji Tsuchihashi, Yoshihiro Omae, Kenzo Tsujikawa, Takashi Takaoka, Yukio Yamaguchi
  • Patent number: 4517668
    Abstract: In an optical disk having an optical recording layer which is capable of having information thereon using a laser beam with information superposed by modulation there is formed a spiral protruding or recessed track having a width equal to about half or less of the wavelength of a laser beam to be used, this track being utilized as the guiding track of the laser beam. A method for manufacturing such an optical disk is also disclosed according to which a recessed track for tracking is formed by plastic deformation of the upper surface of an original disk with a hard processing stylus such as a diamond stylus. The original disk thus produced is utilized for forming an optical recording disk having a protruding or recessed guiding track.
    Type: Grant
    Filed: April 29, 1983
    Date of Patent: May 14, 1985
    Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
    Inventors: Takashi Takaoka, Masahiko Mochizuki, Mitsuo Yamashita, Tadao Miura
  • Patent number: 4417331
    Abstract: In an optical disk having an optical recording layer which is capable of having information thereon using a laser beam with information superposed by modulation there is formed a spiral protruding or recessed track having a width equal to about half or less of the wavelength of a laser beam to be used, this track being utilized as the guiding track of the laser beam. A method for manufacturing such an optical disk is also disclosed according to which a recessed track for tracking is formed by plastic deformation of the upper surface of an original disk with a hard processing stylus such as a diamond stylus. The original disk thus produced is utilized for forming an optical recording disk having a protruding or recessed guiding track.
    Type: Grant
    Filed: February 17, 1981
    Date of Patent: November 22, 1983
    Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
    Inventors: Takashi Takaoka, Masahiko Mochizuki, Mitsuo Yamashita, Tadao Miura
  • Patent number: 4385376
    Abstract: A method of making an optical memory disk and a product thereby comprising the steps of applying a thin tellurium film to a base plate, and of forming an oxidizing layer on the surface of the tellurium by oxidizing treatment of the tellurium film, and an optical memory disk produced by the above-mentioned method.
    Type: Grant
    Filed: September 4, 1981
    Date of Patent: May 24, 1983
    Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
    Inventors: Takashi Takaoka, Masahiko Mochizuki, Tadao Miura, Mitsuo Yamashita
  • Patent number: 4357366
    Abstract: A method of making an optical memory disk and a product thereby comprising the steps of applying a thin tellurium film to a base plate, and of forming an oxidizing layer on the surface of the tellurium by oxidizing treatment of the tellurium film, and an optical memory disk produced by the above-mentioned method.
    Type: Grant
    Filed: March 25, 1980
    Date of Patent: November 2, 1982
    Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
    Inventors: Takashi Takaoka, Masahiko Mochizuki, Tadao Miura, Mitsuo Yamashita