Patents by Inventor Makoto Ryudo

Makoto Ryudo 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: 20190353857
    Abstract: A condenser lens for collecting a laser beam (300) is disposed between the laser oscillator and the incident end surface of the optical fiber. The laser beam (300) is divided into a plurality of beams (303, 304). The power of the laser beam (304) is measured and maximized by adjusting the position of the condenser lens. The FFP of the laser beam (303) is measured and minimized by adjusting the position of the condenser lens. These adjusted positions are stored as the first and second lens positions. The FFP of the laser beam (303) is measured while the condenser lens is being moved between these positions so as to make the BPP not more than a predetermined value.
    Type: Application
    Filed: November 27, 2017
    Publication date: November 21, 2019
    Inventors: RYO ISHIKAWA, MAKOTO RYUDO, DOUKEI NAGAYASU, HITOSHI NISHIMURA, JINGBO WANG, MASATOSHI NISHIO, HIDEAKI YAMAGUCHI, YOSHIAKI TAKENAKA, KIYOTAKA EIZUMI
  • Publication number: 20190351507
    Abstract: A laser processing head includes parallel plate (17) that shifts an optical axis of a laser beam to be emitted from a top to a bottom of body case (6) from a first optical axis to a second optical axis, parallel plate (19) that shift the optical axis of the laser beam from the second optical axis to a third optical axis, and body case (6) that accommodates holders (7 and 18) that respectively hold parallel plates (17 and 19). The laser processing head further includes a rotation mechanism that rotates holders (7 and 18) around a first rotary axis. Opening (7a) that a laser beam reflected by an incident surface of second parallel plate (19) passes through is formed in holder (7), and light receiving part (6a) that receives the laser beam having passed through opening (7a) is disposed in body case (6).
    Type: Application
    Filed: November 20, 2017
    Publication date: November 21, 2019
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Makoto RYUDO, Doukei NAGAYASU, Hitoshi NISHIMURA, Jingbo WANG, Masatoshi NISHIO, Hideaki YAMAGUCHI, Yoshiaki TAKENAKA, Kiyotaka EIZUMI, Ryo ISHIKAWA
  • Publication number: 20190293873
    Abstract: There is provided an optical axis alignment mechanism between the laser oscillator and the optical fiber. The laser oscillator emits laser light, which then emerges from the emission end of the optical fiber via the axis alignment mechanism. Part of the laser light is received on the light-receiving surface of the CCD camera of a laser light evaluator. Thus, the laser light evaluator acquires a light intensity distribution. The light intensity distribution is used by the optical axis alignment mechanism to align the axis of the laser oscillator with the axis of the optical fiber.
    Type: Application
    Filed: November 29, 2017
    Publication date: September 26, 2019
    Inventors: Kiyotaka EIZUMI, Makoto RYUDO, Doukei NAGAYASU, Hitoshi NISHIMURA, Jingbo WANG, Masatoshi NISHIO, Hideaki YAMAGUCHI, Yoshiaki TAKENAKA, Ryo ISHIKAWA
  • Publication number: 20190278026
    Abstract: A fiber coupling device (100) includes the following components: a wedge plate (102) for receiving light and refracting the light in a predetermined direction, a condenser lens (104) for collecting the light refracted by the wedge plate (102); and an optical fiber (107) having an incident surface for receiving the light collected by the condenser lens (104). The wedge plate (102) is held rotatable around the optical axis (200) of the light incident on the wedge plate (102). The light refracted by the wedge plate (102) and collected by the condenser lens (104) is incident on a different point on the incident surface depending on the rotation angle of the wedge plate (102).
    Type: Application
    Filed: May 30, 2019
    Publication date: September 12, 2019
    Inventors: MASATOSHI NISHIO, HITOSHI NISHIMURA, JINGBO WANG, MAKOTO RYUDO, DOUKEI NAGAYASU, HIDEAKI YAMAGUCHI, YOSHIAKI TAKENAKA, KIYOTAKA EIZUMI, RYO ISHIKAWA, YASUSHI MUKAI
  • Publication number: 20190271588
    Abstract: A laser device includes the following components: a laser resonator for emitting a laser beam; a condenser lens (21) for collecting the laser beam emitted from the laser resonator; an optical fiber (7) for transmitting the laser beam collected by the condenser lens (21); at least one light sensor (5) opposing a light receiving surface of the condenser lens (21) and outside the optical path of the laser beam, the at least one light sensor (5) detecting the amount of return light from the condenser lens (21); and a controller for determining the presence of an abnormality when the value of the amount detected by any of the at least one light sensor (5) is greater than the predetermined maximum threshold.
    Type: Application
    Filed: May 21, 2019
    Publication date: September 5, 2019
    Inventors: JINGBO WANG, DOUKEI NAGAYASU, YOSHIAKI TAKENAKA, HITOSHI NISHIMURA, MAKOTO RYUDO, KIYOTAKA EIZUMI, HIDEAKI YAMAGUCHI, RYO ISHIKAWA, MASATOSHI NISHIO, TAKASI KAKUTANI, YASUSHI MUKAI, MITSURU MUKAI, HIROYUKI HAYASHIKAWA
  • Publication number: 20190262938
    Abstract: Laser processing device (1) includes: laser-beam switching apparatus (70) that switches between a first optical path and a second optical path as an optical path along which a laser beam is to travel, the first optical path including first fiber (11), the second optical path including second fiber (21) that has a core diameter that is larger than a core diameter of first fiber (11); and processing head (80) that illuminates a same processed point on workpiece (900) with a laser beam that has passed through the first optical path or the second optical path. When illumination with laser beam that has passed through the first optical path is performed for a predetermined period of time, laser-beam switching apparatus (70) switches from the first optical path to the second optical path.
    Type: Application
    Filed: May 10, 2019
    Publication date: August 29, 2019
    Inventors: DOUKEI NAGAYASU, HITOSHI NISHIMURA, JINGBO WANG, MAKOTO RYUDO, MASATOSHI NISHIO, HIDEAKI YAMAGUCHI, YOSHIAKI TAKENAKA, KIYOTAKA EIZUMI, RYO ISHIKAWA
  • Publication number: 20190064451
    Abstract: A fiber spatial coupling device includes a detachable process fiber, an optical system, and a main body. The process fiber guides laser light. The optical system collects the laser light into the process fiber. The main body holds the optical system, and has a supply port for supplying gas to a space between the process fiber and the optical system.
    Type: Application
    Filed: February 27, 2017
    Publication date: February 28, 2019
    Inventors: YOSHIAKI TAKENAKA, HITOSHI NISHIMURA, MAKOTO RYUDO, JINGBO WANG, MASATOSHI NISHIO, KIYOTAKA EIZUMI, HIDEAKI YAMAGUCHI, RYO ISHIKAWA, DOUKEI NAGAYASU
  • Publication number: 20190030641
    Abstract: A fiber coupling device includes a housing and a window provided in the housing. The fiber coupling device is configured to collectively guide plural laser beams to at least a first fiber, the plurality of laser beams each being emitted from a corresponding one of plural external laser light sources and entering through a laser beam inlet. The housing is configured such that the laser beams enter the housing from the laser beam inlet. The window is provided inside the housing and faces the laser beam inlet. The fiber coupling device is not required to detach when an optical axis is adjusted.
    Type: Application
    Filed: March 7, 2017
    Publication date: January 31, 2019
    Inventors: DOUKEI NAGAYASU, HITOSHI NISHIMURA, MAKOTO RYUDO, JINGBO WANG, YOSHIAKI TAKENAKA, KIYOTAKA EIZUMI, HIDEAKI YAMAGUCHI, RYO ISHIKAWA, MASATOSHI NISHIO
  • Patent number: 9093812
    Abstract: A semiconductor laser module includes a laser diode array, an optical fiber array, a fiber array fitting for fixing the optical fiber array, a casing, and a support fitting for fixing the fiber array fitting and casing. The fiber array fitting and support fitting have a first contact section that is in line-contact or surface-contact with the plane section parallel with the light emission surface of the laser diode array, and are laser-welded and fixed to each other at the first contact section. The support fitting and casing have a second contact section that is in line-contact or surface-contact with the plane section vertical to the light emission surface of the laser diode array, and are laser-welded and fixed to each other at the second contact section.
    Type: Grant
    Filed: November 28, 2014
    Date of Patent: July 28, 2015
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Makoto Ryudo, Naoto Ueda
  • Publication number: 20150087094
    Abstract: A semiconductor laser module includes a laser diode array, an optical fiber array, a fiber array fitting for fixing the optical fiber array, a casing, and a support fitting for fixing the fiber array fitting and casing. The fiber array fitting and support fitting have a first contact section that is in line-contact or surface-contact with the plane section parallel with the light emission surface of the laser diode array, and are laser-welded and fixed to each other at the first contact section. The support fitting and casing have a second contact section that is in line-contact or surface-contact with the plane section vertical to the light emission surface of the laser diode array, and are laser-welded and fixed to each other at the second contact section.
    Type: Application
    Filed: November 28, 2014
    Publication date: March 26, 2015
    Inventors: MAKOTO RYUDO, NAOTO UEDA
  • Patent number: 8985870
    Abstract: A semiconductor laser module includes a laser diode array, an optical fiber array, a fiber array fitting for fixing the optical fiber array, a casing, and a support fitting for fixing the fiber array fitting and casing. The fiber array fitting and support fitting have a first contact section that is in line-contact or surface-contact with the plane section parallel with the light emission surface of the laser diode array, and are laser-welded and fixed to each other at the first contact section. The support fitting and casing have a second contact section that is in line-contact or surface-contact with the plane section vertical to the light emission surface of the laser diode array, and are laser-welded and fixed to each other at the second contact section.
    Type: Grant
    Filed: May 14, 2012
    Date of Patent: March 24, 2015
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Makoto Ryudo, Naoto Ueda
  • Publication number: 20130272334
    Abstract: A semiconductor laser module includes a laser diode array, an optical fiber array, a fiber array fitting for fixing the optical fiber array, a casing, and a support fitting for fixing the fiber array fitting and casing. The fiber array fitting and support fitting have a first contact section that is in line-contact or surface-contact with the plane section parallel with the light emission surface of the laser diode array, and are laser-welded and fixed to each other at the first contact section. The support fitting and casing have a second contact section that is in line-contact or surface-contact with the plane section vertical to the light emission surface of the laser diode array, and are laser-welded and fixed to each other at the second contact section.
    Type: Application
    Filed: May 14, 2012
    Publication date: October 17, 2013
    Applicant: PANASONIC CORPORATION
    Inventors: Makoto Ryudo, Naoto Ueda
  • Patent number: 6791061
    Abstract: An optical processing apparatus has high reliability and stable welding quality. In the processing apparatus, a semiconductor laser and an optical system are disposed to a flow path of processing gas. The gas protects the semiconductor laser and the optical system from moisture and dust while cooling them. In addition, the apparatus also leads the processing gas to flow through a holder of the optical system to increase cooling effect for the optical system and to improve an optical accuracy. The apparatus guides the processing gas along a surface of a cover glass inside a nozzle ejecting the processing gas to a workpiece, to prevent the surface of the cover glass from being damaged and stained. The processing gas is ejected in a direction coaxial with a direction of output light, so as to shield an area being processed.
    Type: Grant
    Filed: November 25, 2002
    Date of Patent: September 14, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Koji Fujii, Kazushige Hirasawa, Dokei Nagayasu, Makoto Ryudo
  • Publication number: 20030132210
    Abstract: An optical processing apparatus has high reliability and stable welding quality. In the processing apparatus, a semiconductor laser and an optical system are disposed to a flow path of processing gas. The gas protects the semiconductor laser and the optical system from moisture and dust while cooling them. In addition, the apparatus also leads the processing gas to flow through a holder of the optical system to increase cooling effect for the optical system and to improve an optical accuracy. The apparatus guides the processing gas along a surface of a cover glass inside a nozzle ejecting the processing gas to a workpiece, to prevent the surface of the cover glass from being damaged and stained. The processing gas is ejected in a direction coaxial with a direction of output light, so as to shield an area being processed.
    Type: Application
    Filed: November 25, 2002
    Publication date: July 17, 2003
    Inventors: Koji Fujii, Kazushige Hirasawa, Dokei Nagayasu, Makoto Ryudo
  • Patent number: 6518536
    Abstract: A joining equipment in which a neural network is employed for controlling a joining process. A dynamic analog model is used for neuron elements configuring the network. The equipment includes a detector, a controller, and a neural network. The detector detects a joining state of a joining portion when work pieces are joined with each other. The controller controls the output of the joining equipment. In response to output signals from the detector, the neural network transmits signals to the controller. Such a structure allows the joining equipment to flexibly respond to complicated changes in joining states. Besides, using similarity with a thermal conduction equation enables to minimize the number of input items fed into the neural network. Furthermore, using an approximate solution to the thermal conduction equation realizes to accelerate the time for numerical calculation without loss of accuracy.
    Type: Grant
    Filed: March 30, 2001
    Date of Patent: February 11, 2003
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Koji Fujii, Jing Bo Wang, Mamoru Watanabe, Yasuhiro Goto, Makoto Ryudo, Kinichi Matsuyama
  • Publication number: 20020008086
    Abstract: A joining equipment in which a neural network is employed for controlling a joining process. A dynamic analog model is used for neuron elements configuring the network. The equipment includes a detector, a controller, and a neural network. The detector detects a joining state of a joining portion when work pieces are joined with each other. The controller controls the output of the joining equipment. In response to output signals from the detector, the neural network transmits signals to the controller. Such a structure allows the joining equipment to flexibly respond to complicated changes in joining states. Besides, using similarity with a thermal conduction equation enables to minimize the number of input items fed into the neural network. Furthermore, using an approximate solution to the thermal conduction equation realizes to accelerate the time for numerical calculation without loss of accuracy.
    Type: Application
    Filed: March 30, 2001
    Publication date: January 24, 2002
    Inventors: Koji Fujii, Jing Bo Wang, Mamoru Watanabe, Yasuhiro Goto, Makoto Ryudo, Kinichi Matsuyama
  • Patent number: 6294753
    Abstract: A resistor welding machine control method for calculating a temperature distribution at a portion to be welded by using changes in welding current and voltage across two welding electrodes during welding and information on sheet combination sequence at a spot-welding position, and for controlling at least the welding current or pressure applied to the electrodes by using the calculated temperature distribution. The present invention can thus provide a resistor welding machine control method capable of controlling welding quality accurately. Spot-welding position information, wear comparison information and the like are available as other information.
    Type: Grant
    Filed: October 21, 1999
    Date of Patent: September 25, 2001
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Koji Fujii, Yasuhiro Gotou, Makoto Ryudo, Mikiji Suzuki
  • Patent number: 6140825
    Abstract: A method for evaluating quality of a resistance weld is provided, in which a nugget generation state during a welding process is evaluated by observable numerical values based on physical phenomena, and which can afford a wide application range in welding material as well as a capability of accurate knowledge as to the nugget generation state of the weld. Based on that a specific resistance value of a metal material to be welded has a temperature dependency in a conduction state of AC or current-pulsated welding current, a rate of change of inter-chip dynamic resistance instantaneous value during a current changing period is determined, a changing state of the dynamic resistance instantaneous value is further calculated, and a heat-generating state of a weld zone, i.e., a nugget formation state is estimated. Thus, a quality evaluation of a weld is performed accurately.
    Type: Grant
    Filed: May 12, 1998
    Date of Patent: October 31, 2000
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Koji Fujii, Yasuhiro Goto, Makoto Ryudo, Kin-ichi Matsuyama
  • Patent number: 6057523
    Abstract: The invention concerns a method of controlling welding conditions of a resistance welder, in which the nugget generating state can be estimated with general-purpose properties, and in which accurate and high-quality resultant welding can be obtained. Through a process of using a heat conduction simulator for performing simulation of a welding portion on the basis of heat conduction calculation, estimating the status quantity expressing the state in which a nugget is formed in the welding portion during welding, comparing the status quantity with reference status quantity led out of a physical phenomenon generating during welding at the time of estimation, and correcting the heat conduction simulator on the basis of the comparison result, it is possible to control the welding conditions accurately, and it is possible to obtain accurate and high-quality resultant welding.
    Type: Grant
    Filed: September 22, 1997
    Date of Patent: May 2, 2000
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Koji Fujii, Yasuhiro Goto, Makoto Ryudo
  • Patent number: 5892197
    Abstract: A control apparatus for a resistance welding machine comprises a welding current detecting device for detecting a welding current, interelectrode voltage detecting device for detecting an interelectrode voltage, a calculating section for predicting a nugget growth or estimating an expulsion & surface-flash generation probability, and control section for controlling the welding current so that the nugget growth or the expulsion & surface-flash generation probability can be adjusted to a predetermined value.
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: April 6, 1999
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yasuhiro Goto, Koji Fujii, Makoto Ryudo