Patents by Inventor Atsuyoshi Shimamoto

Atsuyoshi Shimamoto 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: 10359625
    Abstract: A method and an apparatus for setting driving conditions applied in an optical scanning apparatus. The method for setting driving conditions includes attaching a scanning pattern detector and adjusting a scanning pattern detected by the scanning pattern detector by changing a drive signal applied to an actuator (steps S03 to S06). The step of adjusting includes setting a first drive signal value of the drive signal applied to the actuator and a target amplitude of the scanning pattern (step S03) and determining a frequency of the drive signal applied to the actuator by comparing an amplitude of the scanning pattern detected by changing the frequency of the drive signal applied to the actuator with the target amplitude while vibrating the actuator at the first drive signal value (step S04).
    Type: Grant
    Filed: September 19, 2017
    Date of Patent: July 23, 2019
    Assignee: OLYMPUS CORPORATION
    Inventor: Atsuyoshi Shimamoto
  • Patent number: 10356287
    Abstract: An optical scanning apparatus includes an optical fiber that emits illumination light from a distal end thereof toward a subject, an actuator that oscillates the distal end of the optical fiber, and a controller that controls the actuator so as to two-dimensionally scan the illumination light on the subject and so as to satisfy Conditional Expression of P1?0.5×D, where D is a spot diameter of the illumination light on the subject, and P1 is a scanning-line pitch of the illumination light on the subject.
    Type: Grant
    Filed: March 2, 2018
    Date of Patent: July 16, 2019
    Assignee: OLYMPUS CORPORATION
    Inventor: Atsuyoshi Shimamoto
  • Publication number: 20190004233
    Abstract: An optical scanning apparatus including: an optical fiber that is configured to guide light from a light source to emit the light from a distal end thereof; a driver that is configured to oscillate the distal end of the optical fiber at a driving frequency in a direction intersecting a longitudinal axis of the optical fiber; a resonance-frequency detector that is configured to detect a resonance frequency of the distal end of the optical fiber; and a driving-frequency adjustor that is configured to adjust the driving frequency so that the ratio between the resonance frequency detected by the resonance-frequency detector and the driving frequency becomes constant.
    Type: Application
    Filed: August 13, 2018
    Publication date: January 3, 2019
    Applicant: OLYMPUS CORPORATION
    Inventors: Atsuyoshi SHIMAMOTO, Soichiro KOSHIKA
  • Patent number: 10126547
    Abstract: An optical fiber is vibrated at an emitting end part by a scanning part, and light is irradiated from an emitting end face of the optical fiber onto an object to scan the object. The scanning part includes a pair of first direction coils facing each other in a first direction across the emitting end part, and a permanent magnet installed as penetrating the emitting end part. The permanent magnet is magnetized in the axial direction of the emitting end part. The scanning part drives, by supplying power to the first direction coils, the emitting end part to vibrate in the first direction in the second or higher-order resonance mode, forming nodes of the vibration within the permanent magnet. When in a state of non-vibration in the first direction, a relative distance between the permanent magnet and the first direction coils is smaller than that in other directions.
    Type: Grant
    Filed: March 10, 2016
    Date of Patent: November 13, 2018
    Assignee: OLYMPUS CORPORATION
    Inventors: Masato Fujiwara, Atsuyoshi Shimamoto, Takeharu Innami, Junichi Nishimura
  • Patent number: 10126121
    Abstract: A method of measuring scanning characteristics of an optical scanning apparatus allows measurement of scanning characteristics of an actuator. The method includes bringing a tip of the optical scanning apparatus and a chart for measuring scanning characteristics closer together and irradiating illumination light with the actuator in a non-driven state, separating the tip and the chart for measuring scanning characteristics by a predetermined distance while maintaining the relative orientations thereof, and adjusting a drive signal of the actuator so that a scanning area of the illumination light on the chart for measuring scanning characteristics can form a desired shape. At least one of an angle of deviation and a viewing angle is measured using an irradiation position of the illumination light on the chart for measuring scanning characteristics.
    Type: Grant
    Filed: October 20, 2017
    Date of Patent: November 13, 2018
    Assignee: OLYMPUS CORPORATION
    Inventors: Masashi Yamada, Atsuyoshi Shimamoto, Soichiro Koshika
  • Publication number: 20180196250
    Abstract: A light-scanning apparatus according to the present invention is provided with: an optical fiber; a signal-generating portion that generates a driving signal that has a frequency fd different from a resonant frequency fr of the optical fiber; and a driving portion that causes a distal end of the optical fiber to undergo spiral oscillations in accordance with the driving signal, wherein the signal-generating portion generates the driving signal that includes, during one scanning period, a first period in which an amplitude gradually increases from substantially zero to a maximum value and a second period in which the amplitude gradually decreases from the maximum value to substantially zero, and that satisfies conditional expression (1) below. N2 is the number of oscillations of the driving signal in the second period. { Eq . ? 1 } 2 ? 1 N ? ? 2 2 · 12 ( fd fr - 0.
    Type: Application
    Filed: March 2, 2018
    Publication date: July 12, 2018
    Applicant: OLYMPUS CORPORATION
    Inventor: Atsuyoshi SHIMAMOTO
  • Publication number: 20180191926
    Abstract: An optical scanning apparatus includes an optical fiber that emits illumination light from a distal end thereof toward a subject, an actuator that oscillates the distal end of the optical fiber, and a controller that controls the actuator so as to two-dimensionally scan the illumination light on the subject and so as to satisfy Conditional Expression of P1?0.5×D, where D is a spot diameter of the illumination light on the subject, and P1 is a scanning-line pitch of the illumination light on the subject.
    Type: Application
    Filed: March 2, 2018
    Publication date: July 5, 2018
    Applicant: OLYMPUS CORPORATION
    Inventor: Atsuyoshi SHIMAMOTO
  • Patent number: 9993139
    Abstract: An optical scanning endoscope apparatus includes an optical fiber for illumination, a driver that drives the tip of the optical fiber for illumination in a Lissajous scan pattern, illumination lenses that irradiate an object of observation with irradiation light emitted from the tip of the fiber, a photodetector that detects light obtained from the object of observation by irradiation with the irradiation light and converts the light to an electrical signal, an image processor that generates an image based on the electrical signal output by the photodetector, and a phase adjustor that adjusts the phase of the drive waveform of the driver so as to correct a phase shift between the drive waveform of the tip of the fiber by the driver and the vibration waveform of the tip of the fiber.
    Type: Grant
    Filed: November 28, 2016
    Date of Patent: June 12, 2018
    Assignee: OLYMPUS CORPORATION
    Inventor: Atsuyoshi Shimamoto
  • Publication number: 20180129032
    Abstract: An endoscope observation system includes: a scanning type endoscope including an emission optical fiber configured to emit emission light from an emission end, an actuator configured to cause the emission end to swing, a protection pipe with the emission optical fiber and the actuator attached inside, and a light receiving portion positioned at a distal end portion; an insertion guide configured to guide insertion of the scanning type endoscope into the object along a guide wall; and a holding member arranged between the scanning type endoscope and the guide wall and configured to hold the scanning type endoscope so that a position of the scanning type endoscope is not displaced by swinging of the emission optical fiber.
    Type: Application
    Filed: November 9, 2016
    Publication date: May 10, 2018
    Applicant: OLYMPUS CORPORATION
    Inventors: Daiki ARIYOSHI, Atsuyoshi Shimamoto, Soichiro Koshika
  • Publication number: 20180116492
    Abstract: Provided is a scanning endoscope system including: an illumination-light emitting portion that is inserted into a body of a patient and that emits illumination light emitted from a light-source portion toward an imaging subject in the body in a spot-like manner; a light scanner that scans the illumination light on the imaging subject; and a light detector that is disposed at a body surface of the patient, and that detects reflected light coming from the scanning position in the imaging subject, at which the illumination light is scanned by the light scanner.
    Type: Application
    Filed: December 19, 2017
    Publication date: May 3, 2018
    Applicant: OLYMPUS CORPORATION
    Inventors: Masashi YAMADA, Atsuyoshi SHIMAMOTO, Mitsuru NAMIKI, Keiichiro NAKAJIMA, Takamitsu SAKAMOTO, Mikihiko TERASHIMA, Yoko OKABE, Yu KONDO
  • Publication number: 20180110402
    Abstract: Provided is a scanning endoscope system including an illumination-light emitting unit that outputs illumination light emitted from a light source in a spot-like manner toward a subject, a light scanner that scans the illumination light output from the illumination-light emitting unit over the subject, and a light detector that is provided in a movable manner relative to the illumination-light emitting unit and that detects reflection light from a scan position on the subject over which the illumination light is scanned by the light scanner.
    Type: Application
    Filed: December 12, 2017
    Publication date: April 26, 2018
    Applicant: OLYMPUS CORPORATION
    Inventors: Masashi YAMADA, Atsuyoshi SHIMAMOTO, Mitsuru NAMIKI, Keiichiro NAKAJIMA, Takamitsu SAKAMOTO, Mikihiko TERASHIMA, Yoko OKABE
  • Publication number: 20180113298
    Abstract: A drive-condition setting device applied to an optical scanning apparatus having a fiber and an actuator that vibrates a distal end of the fiber, the drive-condition setting device detects a scan pattern of the illumination light output from the fiber, measures resonance frequencies in the x direction and the y direction of the fiber, sets a drive frequency and a drive voltage based on the resonance frequencies such that conditional expressions below are satisfied: when fx>fy, fd<fy and Vx?Vy (1) or fd>fx and Vx?Vy (2), and when fx?fy, fd<fx and Vx?Vy (3) or fd>fy and Vx?Vy (4) where fd denotes the drive frequency, Vx denotes a maximum voltage of a X direction drive signal, and Vy denotes a maximum voltage of a y direction drive signal.
    Type: Application
    Filed: December 12, 2017
    Publication date: April 26, 2018
    Applicant: OLYMPUS CORPORATION
    Inventors: Atsuyoshi SHIMAMOTO, Masashi YAMADA, Soichiro KOSHIKA
  • Publication number: 20180103835
    Abstract: A scanning-endoscope image evaluation system includes: a scanning endoscope provided with a light detector and a fiber scanner that includes an optical fiber for guiding illumination light coming from a light source and emitting it from its distal end and an actuator that scans the emitted illumination light by vibrating the distal end of the optical fiber; and a chart for evaluating a characteristic of an image acquired by the scanning endoscope, wherein the distal end of the optical fiber and the light detector are disposed so as to face each other with the chart sandwiched therebetween, and forward scattered light that has been emitted from the optical fiber and that has passed through the chart is detected by the light detector.
    Type: Application
    Filed: December 18, 2017
    Publication date: April 19, 2018
    Applicant: OLYMPUS CORPORATION
    Inventors: Masashi YAMADA, Atsuyoshi SHIMAMOTO, Mitsuru NAMIKI
  • Publication number: 20180038686
    Abstract: A method of measuring scanning characteristics of an optical scanning apparatus allows measurement of scanning characteristics of an actuator. The method includes bringing a tip of the optical scanning apparatus and a chart for measuring scanning characteristics closer together and irradiating illumination light with the actuator in a non-driven state, separating the tip and the chart for measuring scanning characteristics by a predetermined distance while maintaining the relative orientations thereof, and adjusting a drive signal of the actuator so that a scanning area of the illumination light on the chart for measuring scanning characteristics can form a desired shape. At least one of an angle of deviation and a viewing angle is measured using an irradiation position of the illumination light on the chart for measuring scanning characteristics.
    Type: Application
    Filed: October 20, 2017
    Publication date: February 8, 2018
    Applicant: OLYMPUS CORPORATION
    Inventors: Masashi YAMADA, Atsuyoshi SHIMAMOTO, Soichiro KOSHIKA
  • Publication number: 20180014719
    Abstract: A scanning endoscope system includes an endoscope that includes an illumination fiber that is configured to guide illumination light for illuminating a subject and to emit the illumination light from an emitting end, and an actuator section that is configured to swing the emitting end of the illumination fiber according to a voltage or a current of an electrical signal that is applied to cause the illumination light to scan the subject, and a driver unit configured to apply, to the actuator section, the electrical signal that takes, as a drive frequency, a frequency at which an amount of change in amplitude at a time of swinging of the emitting end of the illumination fiber is at or below a predetermined value even when frequency characteristics of the amplitude are changed due to a change in a use condition of the endoscope.
    Type: Application
    Filed: September 8, 2017
    Publication date: January 18, 2018
    Applicant: OLYMPUS CORPORATION
    Inventors: Soichiro KOSHIKA, Atsuyoshi SHIMAMOTO, Masashi YAMADA
  • Publication number: 20180003954
    Abstract: A method and an apparatus for setting driving conditions applied in an optical scanning apparatus. The method for setting driving conditions includes attaching a scanning pattern detector and adjusting a scanning pattern detected by the scanning pattern detector by changing a drive signal applied to an actuator (steps S03 to S06). The step of adjusting includes setting a first drive signal value of the drive signal applied to the actuator and a target amplitude of the scanning pattern (step S03) and determining a frequency of the drive signal applied to the actuator by comparing an amplitude of the scanning pattern detected by changing the frequency of the drive signal applied to the actuator with the target amplitude while vibrating the actuator at the first drive signal value (step S04).
    Type: Application
    Filed: September 19, 2017
    Publication date: January 4, 2018
    Applicant: OLYMPUS CORPORATION
    Inventor: Atsuyoshi SHIMAMOTO
  • Publication number: 20180007335
    Abstract: A scanning observation apparatus (10) deflects illumination light with an actuator (25) through an illumination optical system (26) to scan an object (32), subjects light from the object (32) to photoelectric conversion with an optical detector (44), performs processing with an image processor (46), and displays an image of the object (32) on a display (60). A memory (35) stores information on optical characteristics related to chromatic aberration of magnification of the illumination optical system (26) relative to light of predetermined colors. A scanning pattern calculator (45) calculates a scanning pattern, on the object (32), of light of each color using the information. Using the scanning pattern, the image processor (46) calibrates a plot position yielded by a photoelectric conversion signal from the optical detector (44) for light of each color and generates an image of the object (32), thereby more easily correcting the chromatic aberration of magnification.
    Type: Application
    Filed: September 15, 2017
    Publication date: January 4, 2018
    Applicant: OLYMPUS CORPORATION
    Inventors: Junichi NISHIMURA, Atsuyoshi SHIMAMOTO
  • Publication number: 20170311776
    Abstract: An optical scanning endoscope apparatus includes: an illumination optical fiber that emits light from a tip part oscillatably supported; an actuator that drives the tip part of the illumination optical fiber; and a signal generator that generates, with respect to the actuator, a drive signal for causing the tip part of the illumination optical fiber to spiral scan. The signal generator generates the drive signal which includes: an amplitude expansion period for expanding the amplitude of the drive signal of the fiber from substantially 0 to a maximum value; and an amplitude contraction period for contracting the amplitude of the drive signal from the maximum value to substantially 0, the drive signal having an envelope that smoothly continues, with a gradient of substantially 0, across a border between the periods, with the longer one of the periods being defined as an effective scanning period.
    Type: Application
    Filed: July 20, 2017
    Publication date: November 2, 2017
    Applicant: OLYMPUS CORPORATION
    Inventor: Atsuyoshi SHIMAMOTO
  • Patent number: 9775501
    Abstract: An endoscope has an insertion portion inserted through a living body, an illumination fiber arranged at a distal end of the insertion portion and irradiates the living body with illumination light, a detection fiber which detects return light from the living body, an actuator which swings a free end of the illumination fiber, and a ferrule which has a through-hole based on a diameter of the illumination fiber and is arranged between the illumination fiber and the actuator. The actuator has an actuator arranged at a first side face of the ferrule and an actuator arranged at a second side face of the ferrule that is different from a face point-symmetric to the first side face with respect to an axial direction of the illumination fiber.
    Type: Grant
    Filed: March 11, 2014
    Date of Patent: October 3, 2017
    Assignee: OLYMPUS CORPORATION
    Inventors: Masahiro Yoshino, Tomoki Funakubo, Atsuyoshi Shimamoto, Yasunobu Iga, Mitsuru Namiki
  • Patent number: 9766451
    Abstract: Provided is a method for calculating a scanning pattern of light and an optical scanning apparatus. The method includes the steps of: detecting a resonance frequency and an attenuation coefficient of an oscillation part of an optical fiber which guides light from a light source and irradiates an object with the light; and calculating a scanning pattern of the light, based on the detected resonance frequency and attenuation coefficient. The apparatus includes: an optical fiber which guides light from a light source and irradiates an object with the light; a scanning part which drives an oscillation part oscillatably supported of the optical fiber; a detector which detects a resonance frequency of the oscillation part; a calculation part which determines an irradiation position of the light using a scanning pattern calculated based on the resonance frequency detected by the detector and the attenuation coefficient obtained in advance.
    Type: Grant
    Filed: August 17, 2016
    Date of Patent: September 19, 2017
    Assignee: OLYMPUS CORPORATION
    Inventor: Atsuyoshi Shimamoto