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: 11092465Abstract: 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: GrantFiled: February 20, 2015Date of Patent: August 17, 2021Assignee: SHARP KABUSHIKI KAISHAInventors: Norikazu Okada, Masaki Tsuji, Toshiyuki Takada, Katsunori Satoh, Takashi Takaoka
-
Publication number: 20170199272Abstract: 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: ApplicationFiled: May 21, 2015Publication date: July 13, 2017Applicant: SHARP KABUSHIKI KAISHAInventors: Takashi TAKAOKA, Norikazu OKADA, Toshiyuki TAKADA, Masaki TSUJI, Katsunori SATOH
-
Publication number: 20170045381Abstract: 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: ApplicationFiled: February 20, 2015Publication date: February 16, 2017Applicant: SHARP KABUSHIKI KAISHAInventors: Norikazu OKADA, Masaki TSUJI, Toshiyuki TAKADA, Katsunori SATOH, Takashi TAKAOKA
-
Publication number: 20080049210Abstract: 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: ApplicationFiled: August 15, 2007Publication date: February 28, 2008Inventor: Takashi Takaoka
-
Patent number: 7119912Abstract: 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: GrantFiled: June 16, 2003Date of Patent: October 10, 2006Assignee: Sharp Kabushiki KaishaInventor: Takashi Takaoka
-
Patent number: 6844562Abstract: 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: GrantFiled: February 7, 2003Date of Patent: January 18, 2005Assignee: Sharp Kabuskiki KaishaInventors: Takashi Takaoka, Shinya Kawanishi
-
Publication number: 20040257555Abstract: 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: ApplicationFiled: June 22, 2004Publication date: December 23, 2004Inventors: Takashi Takaoka, Shinya Kawanishi
-
Patent number: 6726491Abstract: 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: GrantFiled: August 30, 2001Date of Patent: April 27, 2004Assignee: Sharp Kabushiki KaishaInventors: Takahiko Nakano, Takashi Takaoka, Mitsuhisa Ikuta
-
Publication number: 20040001193Abstract: 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: ApplicationFiled: June 16, 2003Publication date: January 1, 2004Inventor: Takashi Takaoka
-
Publication number: 20030184725Abstract: 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: ApplicationFiled: February 7, 2003Publication date: October 2, 2003Inventors: Takashi Takaoka, Shinya Kawanishi
-
Patent number: 6481902Abstract: 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: GrantFiled: February 23, 2001Date of Patent: November 19, 2002Assignee: Sharp Kabushiki KaishaInventors: Takashi Takaoka, Mitsuhisa Ikuta
-
Publication number: 20020028601Abstract: 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: ApplicationFiled: August 30, 2001Publication date: March 7, 2002Inventors: Takahiko Nakano, Takashi Takaoka, Mitsuhisa Ikuta
-
Publication number: 20010017966Abstract: 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: ApplicationFiled: February 23, 2001Publication date: August 30, 2001Inventors: Takashi Takaoka, Mitsuhisa Ikuta
-
Patent number: 4969141Abstract: 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: GrantFiled: April 18, 1989Date of Patent: November 6, 1990Assignee: Kabushiki Kaisha ToshibaInventors: Takashi Takaoka, Kiyoshi Tsuboi, deceased
-
Patent number: 4682321Abstract: 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: GrantFiled: January 24, 1985Date of Patent: July 21, 1987Assignee: Kabushiki Kaisha ToshibaInventors: Takashi Takaoka, Satoru Koyahara, Tetsuo Saito
-
Patent number: 4655878Abstract: 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: GrantFiled: November 7, 1984Date of Patent: April 7, 1987Assignee: Mitsubishi Chemical Industries, Ltd.Inventors: Yoshio Yoshino, Koji Tsuchihashi, Yoshihiro Omae, Kenzo Tsujikawa, Takashi Takaoka, Yukio Yamaguchi
-
Patent number: 4517668Abstract: 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: GrantFiled: April 29, 1983Date of Patent: May 14, 1985Assignee: Tokyo Shibaura Denki Kabushiki KaishaInventors: Takashi Takaoka, Masahiko Mochizuki, Mitsuo Yamashita, Tadao Miura
-
Patent number: 4417331Abstract: 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: GrantFiled: February 17, 1981Date of Patent: November 22, 1983Assignee: Tokyo Shibaura Denki Kabushiki KaishaInventors: Takashi Takaoka, Masahiko Mochizuki, Mitsuo Yamashita, Tadao Miura
-
Patent number: 4385376Abstract: 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: GrantFiled: September 4, 1981Date of Patent: May 24, 1983Assignee: Tokyo Shibaura Denki Kabushiki KaishaInventors: Takashi Takaoka, Masahiko Mochizuki, Tadao Miura, Mitsuo Yamashita
-
Patent number: 4357366Abstract: 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: GrantFiled: March 25, 1980Date of Patent: November 2, 1982Assignee: Tokyo Shibaura Denki Kabushiki KaishaInventors: Takashi Takaoka, Masahiko Mochizuki, Tadao Miura, Mitsuo Yamashita