Patents by Inventor Keiichiro NAKAJIMA

Keiichiro NAKAJIMA 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: 20210145253
    Abstract: Provided is an objective optical system including: a first spherical lens and a second spherical lens that are arrayed in this order from an object; and at least one of a first optical medium and a second optical medium, wherein the first optical medium is a solid or liquid disposed at an object side of the first spherical lens and is in close contact with a surface on the object side of the first spherical lens, over an entire optical path; and the second optical medium is a solid or liquid disposed at an opposite side of the second spherical lens from the object and is in close contact with a surface on the opposite side of the second spherical lens from the object, over the entire optical path.
    Type: Application
    Filed: December 30, 2020
    Publication date: May 20, 2021
    Applicant: OLYMPUS CORPORATION
    Inventors: Takehiro MIKI, Keiichiro NAKAJIMA, Mitsuru NAMIKI
  • Patent number: 10704953
    Abstract: The disclosed technology is directed to a light detecting apparatus used in an image acquiring apparatus. The image acquiring apparatus comprises a light receiving element that outputs a current according to a light amount of incident light. A current-voltage conversion circuit converts the current output from the light receiving element to a voltage signal. The current-voltage conversion circuit includes an operational amplifier and feedback resistance, feedback capacitance, and at least one diode that are connected in parallel between an inverting terminal and an output terminal of the operational amplifier. The diode is connected to have a forward direction from the inverting terminal toward the output terminal, and following conditional expressions are satisfied, G=Rf B=1/(2?Rf(Cf+Cd/n)) and Vpr>n×Vf>G×Imax.
    Type: Grant
    Filed: March 13, 2019
    Date of Patent: July 7, 2020
    Assignee: Olympus Corporation
    Inventor: Keiichiro Nakajima
  • Patent number: 10609297
    Abstract: The disclosed optical scanning endoscope apparatus includes a scanner that scans an object with illumination light from a light source, a light amount detector that detects a light amount of the illumination light from the light source, and a controller that controls output of the light source based on the light amount detected by the light amount detector. The controller controls the output of the light source based on an integral value of the light amount detected by the light amount detector during an immediately prior predetermined period.
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: March 31, 2020
    Assignee: OLYMPUS CORPORATION
    Inventor: Keiichiro Nakajima
  • Patent number: 10568495
    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: Grant
    Filed: December 19, 2017
    Date of Patent: February 25, 2020
    Assignee: OLYMPUS CORPORATION
    Inventors: Masashi Yamada, Atsuyoshi Shimamoto, Mitsuru Namiki, Keiichiro Nakajima, Takamitsu Sakamoto, Mikihiko Terashima, Yoko Okabe, Yu Kondo
  • Publication number: 20190335986
    Abstract: An optical-scanning-type observation probe is provided with: an imaging optical system that illumination light scanned by an optical scanner enters and that focuses the illumination light in the form of a spot, multiple times; a projection optical system that emits illumination light coming from a focus position focused by the imaging optical system, toward a subject in the form of a spot; and a light-receiver that is provided independently of the imaging optical system and the projection optical system and that receives reflected light of the illumination light, the reflected light coming from the subject, via a light path different from that of the imaging optical system and the projection optical system.
    Type: Application
    Filed: July 19, 2019
    Publication date: November 7, 2019
    Applicant: OLYMPUS CORPORATION
    Inventors: Atsuyoshi SHIMAMOTO, Keiichiro NAKAJIMA, Masashi YAMADA, Takamitsu SAKAMOTO, Mitsuru NAMIKI, Mikihiko TERASHIMA
  • Publication number: 20190212193
    Abstract: The disclosed technology is directed to a light detecting apparatus used in an image acquiring apparatus. The image acquiring apparatus comprises a light receiving element that outputs a current according to a light amount of incident light. A current-voltage conversion circuit converts the current output from the light receiving element to a voltage signal. The current-voltage conversion circuit includes an operational amplifier and feedback resistance, feedback capacitance, and at least one diode that are connected in parallel between an inverting terminal and an output terminal of the operational amplifier. The diode is connected to have a forward direction from the inverting terminal toward the output terminal, and following conditional expressions are satisfied, G=Rf B=1/(2?Rf(Cf+Cd/n)) and Vpr>n×Vf>G×Imax.
    Type: Application
    Filed: March 13, 2019
    Publication date: July 11, 2019
    Applicant: Olympus Corporation
    Inventor: Keiichiro Nakajima
  • 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: 20170325668
    Abstract: Provided is a scanning endoscope apparatus capable of generating an image having an optimum SNR. The scanning endoscope apparatus includes: a light source; an optical fiber that guides light emitted from the light source; an actuator that deflects light emitted from the optical fiber and repeatedly scans the deflected light on the irradiation object; a light detector with a controllable multiplication factor, the light detector photoelectrically converting signal light obtained from the irradiation object irradiated with the light; and a controller, the controller controlling the multiplication factor so as to optimize a SNR based on electric signals obtained for a certain period, the signals having been photoelectrically converted by the optical detection unit.
    Type: Application
    Filed: August 1, 2017
    Publication date: November 16, 2017
    Applicant: OLYMPUS CORPORATION
    Inventor: Keiichiro NAKAJIMA
  • Publication number: 20170311779
    Abstract: This optical scanning endoscope apparatus can correct the white balance even when bending occurs in the illumination fiber. An optical scanning endoscope apparatus includes an illumination fiber that guides illumination light composed of RGB wavelengths (colors), an actuator that drives the tip of the illumination fiber and repeatedly scans the illumination light over an object, a photodetector that detects light obtained from the object by scanning of the illumination light, a signal processor that generates an image based on output of the photodetector, and a light amount detector for white balance that detects the light amount of light of RGB wavelengths from a portion of the illumination light guided by the illumination fiber. Based on the light amount of light of each of the RGB wavelengths detected by the light amount detector for white balance, the controller adjusts the white balance of the generated image.
    Type: Application
    Filed: May 17, 2017
    Publication date: November 2, 2017
    Applicant: OLYMPUS CORPORATION
    Inventor: Keiichiro NAKAJIMA
  • Publication number: 20170227755
    Abstract: This optical scanning endoscope apparatus includes an actuator that scans light from a light source over an object with a predetermined scan cycle, a light amount detector that detects the light amount from the light source, and a controller that controls output of the light source based on the light amount detected by the light amount detector. During each scan cycle by the actuator, the controller controls the light source so as to output light according to a predetermined output change pattern, sequentially calculates an integral value of the light amount detected by the light amount detector over a predetermined time period, and controls the maximum of the change in output of the light source due to the output change pattern so that the integral value does not exceed a predetermined standard value.
    Type: Application
    Filed: April 28, 2017
    Publication date: August 10, 2017
    Applicant: OLYMPUS CORPORATION
    Inventor: Keiichiro NAKAJIMA
  • Publication number: 20170099421
    Abstract: The disclosed optical scanning endoscope apparatus includes a scanner that scans an object with illumination light from a light source, a light amount detector that detects a light amount of the illumination light from the light source, and a controller that controls output of the light source based on the light amount detected by the light amount detector. The controller controls the output of the light source based on an integral value of the light amount detected by the light amount detector during an immediately prior predetermined period.
    Type: Application
    Filed: December 19, 2016
    Publication date: April 6, 2017
    Applicant: OLYMPUS CORPORATION
    Inventor: Keiichiro NAKAJIMA
  • Patent number: 8682432
    Abstract: Provided is a cardiac-event processor (1) including a storing unit (11) that stores a time history of cardiac events, including heartbeats, in association with the presence/absence of nerve stimulation; a heart rate calculator (12) that calculates a heart rate for when each heartbeat is detected, on the basis of the time history of the cardiac events stored in the storing unit (11); and a frequency data generator (13) that separately adds up frequencies of the heart rates calculated by the heart rate calculator (12) for the cases with and without the nerve stimulation.
    Type: Grant
    Filed: September 17, 2010
    Date of Patent: March 25, 2014
    Assignee: Olympus Corporation
    Inventor: Keiichiro Nakajima
  • Patent number: 8682429
    Abstract: A nerve stimulation apparatus performs nerve stimulation of a required level while reducing the adverse effect on the heart and on the detection of a cardiac event. Provided is a nerve stimulation apparatus that includes a stimulation signal output unit that outputs a nerve stimulation signal; a cardiac event detector that detects a cardiac event; and a controller that controls the stimulation signal output unit so as to output a nerve stimulation signal having a smaller intensity in a non-refractory period than that in a cardiac refractory period that is obtained on the basis of the cardiac event detected by the cardiac event detector.
    Type: Grant
    Filed: February 24, 2011
    Date of Patent: March 25, 2014
    Assignee: Olympus Corporation
    Inventors: Keiichiro Nakajima, Hiroki Hibino
  • Patent number: 8548598
    Abstract: Provided is a nerve stimulation apparatus that is capable of performing effective nerve stimulation depending on a therapeutic purpose without adversely affecting a heart. Further provided is a nerve stimulation apparatus including: a stimulation-pulse output unit that outputs a stimulation pulse; a cardiac-event detector that detects a cardiac event; and a controller that controls the stimulation-signal output unit so as to output, during a cardiac refractory period, the nerve stimulation signal having an intensity that corresponds to the heart rate obtained on the basis of the cardiac event detected by the cardiac-event detector.
    Type: Grant
    Filed: March 12, 2012
    Date of Patent: October 1, 2013
    Assignee: Olympus Corporation
    Inventors: Keiichiro Nakajima, Hiroki Hibino
  • Publication number: 20130073006
    Abstract: Provided is a nerve stimulation apparatus that is capable of performing effective nerve stimulation depending on a therapeutic purpose without adversely affecting a heart. Further provided is a nerve stimulation apparatus including: a stimulation-pulse output unit that outputs a stimulation pulse; a cardiac-event detector that detects a cardiac event; and a controller that controls the stimulation-signal output unit so as to output, during a cardiac refractory period, the nerve stimulation signal having an intensity that corresponds to the heart rate obtained on the basis of the cardiac event detected by the cardiac-event detector.
    Type: Application
    Filed: March 12, 2012
    Publication date: March 21, 2013
    Applicant: OLYMPUS CORPORATION
    Inventors: Keiichiro NAKAJIMA, Hiroki HIBINO
  • Publication number: 20120053650
    Abstract: A nerve stimulation apparatus performs nerve stimulation of a required level while reducing the adverse effect on the heart and on the detection of a cardiac event. Provided is a nerve stimulation apparatus that includes a stimulation signal output unit that outputs a nerve stimulation signal; a cardiac event detector that detects a cardiac event; and a controller that controls the stimulation signal output unit so as to output a nerve stimulation signal having a smaller intensity in a non-refractory period than that in a cardiac refractory period that is obtained on the basis of the cardiac event detected by the cardiac event detector.
    Type: Application
    Filed: February 24, 2011
    Publication date: March 1, 2012
    Applicant: OLYMPUS CORPORATION
    Inventors: Keiichiro NAKAJIMA, Hiroki HIBINO
  • Publication number: 20110106198
    Abstract: Provided is a cardiac-event processor (1) including a storing unit (11) that stores a time history of cardiac events, including heartbeats, in association with the presence/absence of nerve stimulation; a heart rate calculator (12) that calculates a heart rate for when each heartbeat is detected, on the basis of the time history of the cardiac events stored in the storing unit (11); and a frequency data generator (13) that separately adds up frequencies of the heart rates calculated by the heart rate calculator (12) for the cases with and without the nerve stimulation.
    Type: Application
    Filed: September 17, 2010
    Publication date: May 5, 2011
    Applicant: OLYMPUS CORPORATION
    Inventor: Keiichiro NAKAJIMA