Patents by Inventor Kenji Numata

Kenji Numata 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: 11394168
    Abstract: A master oscillator configured as a seed laser for a laser optical module includes a reduced size, temperature controlled non-planar ring oscillator, a piezo-electric transducer mounted on the non-planar ring oscillator, a pump laser diode, and coupling optics configured to couple a laser output of the pump laser diode to an end face of the non-planar ring oscillator. The pump laser diode may operate as a single-mode pump.
    Type: Grant
    Filed: June 5, 2019
    Date of Patent: July 19, 2022
    Assignee: United States of America as represented by the Administrator of NASA
    Inventors: Anthony Yu, Kenji Numata
  • Patent number: 10816463
    Abstract: A laser spectrometer includes a tunable laser assembly, a periodically-poled nonlinear optical crystal, with parallel polished input and output end faces, and a mechanism for controlling an entrance location of a pump input beam of the tunable laser on the input end face of the periodically-poled nonlinear optical crystal, such that the pump input beam traverses different grating periods of the periodically-poled nonlinear optical crystal.
    Type: Grant
    Filed: August 9, 2018
    Date of Patent: October 27, 2020
    Assignee: United States of America as represented by the Administrator of NASA
    Inventors: Kenji Numata, Haris Riris, Stewart T. Wu, Xiaoli Sun
  • Patent number: 10819080
    Abstract: Coating-less nonplanar ring oscillator lasers are disclosed. Such lasers may eliminate the need for thin-film optical coatings from a laser cavity, solving the problem of optical damage to the coatings, and thus, providing a longer useful lifetime for the laser for space or terrestrial applications. Such lasers may be compact, ultra-stable, and highly reliable, enabling a low phase noise, single frequency laser in a compact package. Such lasers may be used in CW and/or in pulse mode.
    Type: Grant
    Filed: August 14, 2019
    Date of Patent: October 27, 2020
    Assignee: United States of America as represented by the Administrator of NASA
    Inventors: Kenji Numata, Anthony Yu
  • Patent number: 10799259
    Abstract: A venous valve incising cutter includes a cutting teeth head, a guide, a wire and a coupling rod that couples the guide and a cutting teeth head, all aligned in a rotation axis thereof. More than four pieces of cutting blades are formed on the outer surrounding surface of the cutting teeth head. Each cutting blade has a roughly triangular pyramid shape such that the three ridge lines are composed of the outer surrounding surface of the cutting teeth head and the two planes formed in the reverse side of the outer surrounding surface and the apex is a knife-point of the cutting blade.
    Type: Grant
    Filed: January 15, 2018
    Date of Patent: October 13, 2020
    Assignees: NUMATA OPTICAL INSTRUMENTS FACTORY
    Inventors: Takatoshi Furuya, Kenji Numata
  • Patent number: 10348052
    Abstract: The present invention relates to a laser system and method which enables fast, accurate laser frequency tuning. In particular, the present invention includes only one laser and only one absolute frequency locking loop to perform the same fast frequency tuning than previous seed laser systems.
    Type: Grant
    Filed: September 26, 2017
    Date of Patent: July 9, 2019
    Assignee: The United States of America as represented by the Administrator of NASA
    Inventors: Kenji Numata, Haris Riris, Stewart T. Wu
  • Patent number: 10194084
    Abstract: An image processing device including: one or more processors comprising hardware, wherein the one or more processors are configured to: calculate an estimated movement amount of a subject in each image of a plurality of images; perform, based on the estimated movement amounts, one of: select and output an image that is most recently captured among the plurality of images; and select a reference image from the plurality of images based on the estimated movement amounts of the subject in the plurality of images; in response to selecting the reference image, determine a gain of the reference image; and perform, based on the gain, one of: select and output the reference image; and a synthesis process including: select a synthesis target image from the plurality of images; and generate and output a synthesized image by synthesizing the synthesis target image and the reference image.
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: January 29, 2019
    Assignee: OLYMPUS CORPORATION
    Inventor: Kenji Numata
  • Publication number: 20180296065
    Abstract: An endoscope device includes a tip section including an imaging element for outputting a pixel signal of a captured image and configured to be inserted into an object, and a flexible section including a first serial signal transmission path along which a setting related to photographing is transmitted to the imaging element via first serial communication and a second serial signal transmission path along which the pixel signal is transmitted via second serial communication and configured to guide the tip section into the object, wherein the second serial signal transmission path includes an equalizer circuit configured to correct frequency characteristics of a serial signal and a limiting amplifier circuit configured to amplify the serial signal corrected by the equalizer circuit, and wherein the equalizer circuit and the limiting amplifier circuit are connected on the same substrate surface.
    Type: Application
    Filed: June 26, 2018
    Publication date: October 18, 2018
    Applicant: OLYMPUS CORPORATION
    Inventors: Mitsunobu ONO, Kenji NUMATA
  • Publication number: 20180132882
    Abstract: A venous valve incising cutter includes a cutting teeth head, a guide, a wire and a coupling rod that couples the guide and a cutting teeth head, all aligned in a rotation axis thereof. More than four pieces of cutting blades are formed on the outer surrounding surface of the cutting teeth head. Each cutting blade has a roughly triangular pyramid shape such that the three ridge lines are composed of the outer surrounding surface of the cutting teeth head and the two planes formed in the reverse side of the outer surrounding surface and the apex is a knife-point of the cutting blade.
    Type: Application
    Filed: January 15, 2018
    Publication date: May 17, 2018
    Inventors: Takatoshi FURUYA, Kenji NUMATA
  • Patent number: 9964699
    Abstract: Disclosed herein are systems and methods related to use of hollow core photonic crystal fibers. A system includes a tube and a collimating lens configured in a first end of the tube, wherein a single mode fiber is coupled to a first end of the collimating lens. A second lens is supported by a structure at a second end of the tube, the second lens receiving a first signal from a second end of the collimating lens and outputting a second signal that is coupled into a first end of a hollow core photonic crystal fiber. A first gas tube is configured to introduce gas through the structure into a chamber and a sealant seals at least one of the collimating lens and the structure within the tube. An output signal is received at a detector that catches the entire beam to suppress multiple-mode beating noise.
    Type: Grant
    Filed: September 21, 2015
    Date of Patent: May 8, 2018
    Assignee: The United States of America, as represented by the Administrator of the National Aeronautics and Space Administraion
    Inventors: Jeffrey R. Chen, Kenji Numata, Stewart T. Wu
  • Patent number: 9872693
    Abstract: A venous valve incising cutter includes a cutting teeth head, a guide, a wire and a coupling rod that couples the guide and a cutting teeth head, all aligned in a rotation axis thereof. More than four pieces of cutting blades are formed on the outer surrounding surface of the cutting teeth head. Each cutting blade has a roughly triangular pyramid shape such that the three ridge lines are composed of the outer surrounding surface of the cutting teeth head and the two planes formed in the reverse side of the outer surrounding surface and the apex is a knife-point of the cutting blade.
    Type: Grant
    Filed: February 2, 2015
    Date of Patent: January 23, 2018
    Assignees: TAKATOSHI FURUYA, NUMATA OPTICAL INSTRUMENTS FACTORY
    Inventors: Takatoshi Furuya, Kenji Numata
  • Publication number: 20170353666
    Abstract: An image processing device including: one or more processors comprising hardware, wherein the one or more processors are configured to: calculate an estimated movement amount of a subject in each image of a plurality of images; perform, based on the estimated movement amounts, one of: select and output an image that is most recently captured among the plurality of images; and select a reference image from the plurality of images based on the estimated movement amounts of the subject in the plurality of images; in response to selecting the reference image, determine a gain of the reference image; and perform, based on the gain, one of: select and output the reference image; and a synthesis process including: select a synthesis target image from the plurality of images; and generate and output a synthesized image by synthesizing the synthesis target image and the reference image.
    Type: Application
    Filed: August 25, 2017
    Publication date: December 7, 2017
    Applicant: OLYMPUS CORPORATION
    Inventor: Kenji NUMATA
  • Publication number: 20160327735
    Abstract: Disclosed herein are systems and methods related to use of hollow core photonic crystal fibers. A system includes a tube and a collimating lens configured in a first end of the tube, wherein a single mode fiber is coupled to a first end of the collimating lens. A second lens is supported by a structure at a second end of the tube, the second lens receiving a first signal from a second end of the collimating lens and outputting a second signal that is coupled into a first end of a hollow core photonic crystal fiber. A first gas tube is configured to introduce gas through the structure into a chamber and a sealant seals at least one of the collimating lens and the structure within the tube. An output signal is received at a detector that catches the entire beam to suppress multiple-mode beating noise.
    Type: Application
    Filed: September 21, 2015
    Publication date: November 10, 2016
    Inventors: JEFFREY R. CHEN, KENJI NUMATA, STEWART T. WU
  • Publication number: 20150216548
    Abstract: A venous valve incising cutter includes a cutting teeth head, a guide, a wire and a coupling rod that couples the guide and a cutting teeth head, all aligned in a rotation axis thereof. More than four pieces of cutting blades are formed on the outer surrounding surface of the cutting teeth head. Each cutting blade has a roughly triangular pyramid shape such that the three ridge lines are composed of the outer surrounding surface of the cutting teeth head and the two planes formed in the reverse side of the outer surrounding surface and the apex is a knife-point of the cutting blade.
    Type: Application
    Filed: February 2, 2015
    Publication date: August 6, 2015
    Inventors: Takatoshi FURUYA, Kenji NUMATA
  • Patent number: 9065242
    Abstract: An apparatus and method is provided to enable precision and fast laser frequency tuning. For instance, a fast tunable slave laser may be dynamically offset-locked to a reference laser line using an optical phase-locked loop. The slave laser is heterodyned against a reference laser line to generate a beatnote that is subsequently frequency divided. The phase difference between the divided beatnote and a reference signal may be detected to generate an error signal proportional to the phase difference. The error signal is converted into appropriate feedback signals to phase lock the divided beatnote to the reference signal. The slave laser frequency target may be rapidly changed based on a combination of a dynamically changing frequency of the reference signal, the frequency dividing factor, and an effective polarity of the error signal. Feed-forward signals may be generated to accelerate the slave laser frequency switching through laser tuning ports.
    Type: Grant
    Filed: May 17, 2012
    Date of Patent: June 23, 2015
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics Space Administration
    Inventors: Jeffrey R. Chen, Kenji Numata, Stewart T. Wu, Guangning Yang
  • Patent number: 9041825
    Abstract: An image processing apparatus of the present invention includes: a video input section to which live video obtained by picking up an image of an object is inputted; a frame interpolation processing section which, by inserting an interpolated image between images of frames constituting the live video, performs processing for generating and outputting interpolated video of a frame rate set in advance; and a control section which, when an instruction for freezing video displayed on a display section is made, operates so as to cause a still image of a frame constituting the live video to be displayed on the display section.
    Type: Grant
    Filed: September 11, 2012
    Date of Patent: May 26, 2015
    Assignee: OLYMPUS CORPORATION
    Inventor: Kenji Numata
  • Patent number: 8730313
    Abstract: An endoscope apparatus includes: a reading unit which reads video data and control data from a recording medium, the recording medium containing the video data including a plurality of image data and the control data used to control a measurement operation; a measuring unit which performs the measurement operation on the basis of the image data of the video data read by the reading unit; and a control unit which controls the measuring unit on the basis of the control data read by the reading unit.
    Type: Grant
    Filed: January 19, 2010
    Date of Patent: May 20, 2014
    Assignee: Olympus Corporation
    Inventor: Kenji Numata
  • Publication number: 20130308663
    Abstract: An apparatus and method is provided to enable precision and fast laser frequency tuning. For instance, a fast tunable slave laser may be dynamically offset-locked to a reference laser line using an optical phase-locked loop. The slave laser is heterodyned against a reference laser line to generate a beatnote that is subsequently frequency divided. The phase difference between the divided beatnote and a reference signal may be detected to generate an error signal proportional to the phase difference. The error signal is converted into appropriate feedback signals to phase lock the divided beatnote to the reference signal. The slave laser frequency target may be rapidly changed based on a combination of a dynamically changing frequency of the reference signal, the frequency dividing factor, and an effective polarity of the error signal. Feed-forward signals may be generated to accelerate the slave laser frequency switching through laser tuning ports.
    Type: Application
    Filed: May 17, 2012
    Publication date: November 21, 2013
    Inventors: JEFFREY R. CHEN, Kenji Numata, Stewart T. Wu, Guangning Yang
  • Publication number: 20130093908
    Abstract: An image processing apparatus of the present invention includes: a video input section to which live video obtained by picking up an image of an object is inputted; a frame interpolation processing section which, by inserting an interpolated image between images of frames constituting the live video, performs processing for generating and outputting interpolated video of a frame rate set in advance; and a control section which, when an instruction for freezing video displayed on a display section is made, operates so as to cause a still image of a frame constituting the live video to be displayed on the display section.
    Type: Application
    Filed: September 11, 2012
    Publication date: April 18, 2013
    Applicant: OLYMPUS CORPORATION
    Inventor: Kenji NUMATA
  • Publication number: 20120209064
    Abstract: An endoscope apparatus 1 includes a main body 4 to which a scope having an image pickup device at a distal end portion 8 of an insertion portion 7b is detachably attachable, a video signal processing section 22, a display section 5 and a control section 21. The control section 21 displays on the display section 5 a message for instructing a user to light-shield the distal end portion 8 according to an instruction for starting initialization processing to acquire a reference image of the image pickup device, acquires the reference image with the distal end portion 8 light-shielded and stores the acquired reference image in a memory 27.
    Type: Application
    Filed: February 8, 2012
    Publication date: August 16, 2012
    Applicant: OLYMPUS CORPORATION
    Inventor: Kenji NUMATA
  • Patent number: 7970025
    Abstract: A method and system for stabilizing a laser to a frequency reference with an adjustable offset. The method locks a sideband signal generated by passing an incoming laser beam through the phase modulator to a frequency reference, and adjusts a carrier frequency relative to the locked sideband signal by changing a phase modulation frequency input to the phase modulator. The sideband signal can be a single sideband (SSB), dual sideband (DSB), or an electronic sideband (ESB) signal. Two separate electro-optic modulators can produce the DSB signal. The two electro-optic modulators can be a broadband modulator and a resonant modulator. With a DSB signal, the method can introduce two sinusoidal phase modulations at the phase modulator. With ESB signals, the method can further drive the optical phase modulator with an electrical signal with nominal frequency ?1 that is phase modulated at a frequency ?2.
    Type: Grant
    Filed: July 2, 2009
    Date of Patent: June 28, 2011
    Assignee: The United States of America as represented by the Administrator of The National Aeronautics and Space Administration
    Inventors: Jeffrey Livas, James I. Thorpe, Kenji Numata