Patents by Inventor Masaaki Hanebuchi

Masaaki Hanebuchi 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: 11071452
    Abstract: The present disclosure relates to an optical coherence tomography (OCT) including: an OCT device, an OCT calculation method, and an OCT calculation program, enabling correlation between images to be easily performed; more specifically it relates to a case where a functional OCT image such as a motion contrast is acquired by using the OCT; acquiring the functional OCT image through a calculation process of an OCT signal is a time-consuming process, for this reason, a long time elapses until the point that a functional OCT image can be observed after OCT imaging is completed, and thus this causes stress to a subject and an examiner; the present disclosure provides an OCT device, an OCT calculation method, and an OCT calculation program, enabling a functional OCT image to be rapidly acquired and enables an examiner to easily perform diagnosis.
    Type: Grant
    Filed: June 29, 2015
    Date of Patent: July 27, 2021
    Assignee: NIDEK CO., LTD.
    Inventors: Norimasa Satake, Yukihiro Higuchi, Yuji Murase, Yasuhiro Furuuchi, Hajime Namiki, Naoki Isogai, Masaaki Hanebuchi, Naoki Takeno
  • Patent number: 10966604
    Abstract: A subjective optometry apparatus includes a subjective measurement portion which subjectively measures optical characteristics of an subject eye, an objective measurement portion which objectively measures optical characteristics of the subject eye, a control portion which causes the objective measurement portion to objectively measure the optical characteristics during the measurement by the subjective measurement portion, and a display control portion which performs a control to display an eye diagram representing the subject eye and an imaging position of a target light flux incident on the subject eye. The display control portion performs a control to display the imaging position based on the objectively measured optical characteristics.
    Type: Grant
    Filed: September 27, 2018
    Date of Patent: April 6, 2021
    Assignee: NIDEK CO., LTD.
    Inventors: Michihiro Takii, Masaki Tanaka, Masaaki Hanebuchi
  • Patent number: 10718601
    Abstract: An optical coherence tomography device provided with: an OCT optical system configured to output OCT signal; and an analysis processing unit configured to process the OCT signal and generate motion contrast data of the specimen. The analysis processing unit is provided with: a first image data generation unit configured to process multiple OCT signals to generate first image data representing phase difference information of the multiple OCT signals, and a second image data generation unit configured to process the OCT signal to generate second image data representing amplitude information of the OCT signal. The analysis processing unit generates the motion contrast data based on the phase difference information in the first image data and the amplitude information in the second image data.
    Type: Grant
    Filed: February 20, 2018
    Date of Patent: July 21, 2020
    Assignee: NIDEK CO., LTD.
    Inventors: Naoki Takeno, Masaaki Hanebuchi, Yasuhiro Furuuchi, Hajime Namiki
  • Patent number: 10674908
    Abstract: A fundus imaging device includes an objective optical system formed of a plurality of eccentrically disposed mirrors, and an SLO optical system and an OCT optical system which irradiate a fundus with light from a light source via the objective optical system and receive fundus reflected light. The fundus imaging device further includes a correction mirror as a part of the objective optical system, or between the objective optical system and the SLO optical system or the OCT optical system. The correction mirror corrects an eccentric aberration which occurs due to eccentric arrangement of the plurality of mirrors.
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: June 9, 2020
    Assignee: NIDEK CO., LTD.
    Inventors: Go Matsunobu, Joji Sasaki, Masaaki Hanebuchi
  • Patent number: 10602924
    Abstract: A subjective optometry apparatus includes a light projecting optical system which projects a target light flux toward an examinee's eye to project a visual target onto the examinee's eye, a calibration optical system which is disposed in an optical path from the light projecting optical system to the examinee's eye and changes optical characteristics of the target light flux, an optical member which guides the target light flux of which the optical characteristics is changed by the calibration optical system to the examinee's eye, a light deflection section being different from the calibration optical system, which includes light deflection members provided in a left and right pair and a driving section which rotationally drives the light deflection members, and deflects the target light flux by rotating the light deflection members, and a control section which controls the light deflection section based on prism information to deflect the target light flux.
    Type: Grant
    Filed: March 30, 2018
    Date of Patent: March 31, 2020
    Assignee: NIDEK CO., LTD.
    Inventors: Michihiro Takii, Masaaki Hanebuchi, Hisashi Ochi
  • Publication number: 20200037872
    Abstract: An OCT apparatus includes an OCT optical system that has a light splitter splitting light from an OCT light source to light travelling to a measurement light path and light travelling to a reference light path and a detector detecting a spectrum interference signal of measurement light guided to a subject eye through the measurement light path and reference light from the reference light path, and a processing unit that processes the spectrum interference signal to generate OCT data. The processing unit performs at least complementary processing on an overlapping region of a real image and a virtual image in OCT data based on a plurality of OCT data obtained with different optical path lengths when detecting the spectrum interference signal, and generates OCT data subjected to the complementary processing.
    Type: Application
    Filed: July 31, 2019
    Publication date: February 6, 2020
    Applicant: NIDEK CO., LTD.
    Inventors: Ryosuke SHIBA, Masaaki HANEBUCHI, Naoki TAKENO, Yoshiki KUMAGAI
  • Patent number: 10537239
    Abstract: A subjective optometry apparatus includes a light projecting optical system that projects a target light flux to an examinee's eye, a fixed optical element that guides an image of the target light flux to the examinee's eye so as to have an optically predetermined examination length, a calibration optical system disposed in an optical path of the light projecting optical system to change optical characteristics of the examinee's eye, a measurement unit that accommodates the light projecting optical system; a positional information acquiring portion that acquires positional information of the measurement unit, a correction amount setting portion that sets a correction amount for correcting a projection magnification of the target light flux projected to the examinee's eye, based on the positional information, and a correction portion that corrects the projection magnification of the target light flux based on the correction amount set by the correction amount setting portion.
    Type: Grant
    Filed: March 6, 2018
    Date of Patent: January 21, 2020
    Assignee: NIDEK CO., LTD.
    Inventors: Michihiro Takii, Masaaki Hanebuchi, Hisashi Ochi, Sasagu Tachibana
  • Publication number: 20190380588
    Abstract: An OCT signal processing device has an acquisition unit for acquiring three or more OCT signals being temporally different from each other with respect to the same position on a subject, from an OCT device that detects an OCT signal based on reflection light of measurement light applied to a subject and reference light corresponding to the measurement light, and a calculation unit for calculating motion contrast based on a plurality of OCT signals. The calculation unit selects two or more sets of OCT signals having different time interval between the OCT signals among sets obtained by extracting a plurality of OCT signals out of the three or more OCT signals, and calculates motion contrast for each of the selected two or more sets.
    Type: Application
    Filed: January 5, 2017
    Publication date: December 19, 2019
    Applicant: NIDEK CO., LTD.
    Inventors: Naoki TAKENO, Masaaki HANEBUCHI, Yasuhiro FURUUCHI, Hajime NAMIKI
  • Patent number: 10264967
    Abstract: A subjective optometry apparatus includes subjective measurement unit for subjectively measuring an optical characteristic of a subject eye, the subjective measurement unit including a calibration optical system that is disposed in an optical path of a light projecting optical system projecting a visual target luminous flux toward the subject eye and changes an optical characteristic of the visual target luminous flux. The subjective optometry apparatus includes objective measurement unit for objectively measuring the optical characteristic of the subject eye, the objective measurement unit including a measurement optical system that emits measurement light to a fundus of the subject eye and receives reflected light of the measurement light.
    Type: Grant
    Filed: September 1, 2017
    Date of Patent: April 23, 2019
    Assignee: NIDEK CO., LTD.
    Inventors: Michihiro Takii, Masaaki Hanebuchi, Noriji Kawai
  • Publication number: 20190099073
    Abstract: A subjective optometry apparatus includes a subjective measurement portion which subjectively measures optical characteristics of an subject eye, an objective measurement portion which objectively measures optical characteristics of the subject eye, a control portion which causes the objective measurement portion to objectively measure the optical characteristics during the measurement by the subjective measurement portion, and a display control portion which performs a control to display an eye diagram representing the subject eye and an imaging position of a target light flux incident on the subject eye. The display control portion performs a control to display the imaging position based on the objectively measured optical characteristics.
    Type: Application
    Filed: September 27, 2018
    Publication date: April 4, 2019
    Applicant: NIDEK CO., LTD.
    Inventors: Michihiro TAKII, Masaki TANAKA, Masaaki HANEBUCHI
  • Patent number: 10188282
    Abstract: A subjective optometry apparatus includes: a subjective measurer including a light projecting optical system, a corrective optical system including a right-eye corrective optical system and a left-eye corrective optical system, and an optical member for guiding the target light flux corrected by the corrective optical system to an examinee's eye, the subjective measurer subjectively measuring an optical characteristic of the examinee's eye; and an objective measurer including a measurement optical system for emitting measurement light to a fundus of the examinee's eye and for receiving reflected light from the fundus, the objective measurer objectively measuring the optical characteristic of the examinee's eye via the optical member disposed on an optical path of the measurement optical system.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: January 29, 2019
    Assignee: NIDEK CO., LTD.
    Inventors: Michihiro Takii, Masaaki Hanebuchi, Hisashi Ochi
  • Publication number: 20180296085
    Abstract: A subjective optometry apparatus includes a light projecting optical system which projects a target light flux toward an examinee's eye to project a visual target onto the examinee's eye, a calibration optical system which is disposed in an optical path from the light projecting optical system to the examinee's eye and changes optical characteristics of the target light flux, an optical member which guides the target light flux of which the optical characteristics is changed by the calibration optical system to the examinee's eye, a light deflection section being different from the calibration optical system, which includes light deflection members provided in a left and right pair and a driving section which rotationally drives the light deflection members, and deflects the target light flux by rotating the light deflection members, and a control section which controls the light deflection section based on prism information to deflect the target light flux.
    Type: Application
    Filed: March 30, 2018
    Publication date: October 18, 2018
    Applicant: NIDEK CO., LTD.
    Inventors: Michihiro TAKII, Masaaki HANEBUCHI, Hisashi OCHI
  • Patent number: 10101148
    Abstract: An OCT apparatus includes: a light source unit that includes first and second wavelength sweeping light sources which sequentially emit light with first and second spectrum bandwidths; an SS-OCT optical system that splits the light into measurement light and reference light to receive interference signal light; a second detector that is a deviation detector detecting a phase deviation and a wavelength deviation and detects a signal including pieces of FPN; a calculation processor connecting first and second spectrum interference signals and processes the connected spectrum interference signals to acquire an OCT image and that obtains the phase deviation and the wavelength deviation; and a correction unit that corrects the phase deviation and the wavelength deviation and corrects the phase deviation and the wavelength deviation obtained by the calculation processor.
    Type: Grant
    Filed: October 12, 2017
    Date of Patent: October 16, 2018
    Assignee: NIDEK CO., LTD.
    Inventors: Keiji Murata, Masaaki Hanebuchi
  • Publication number: 20180289260
    Abstract: A fundus imaging device includes an objective optical system formed of a plurality of eccentrically disposed mirrors, and an SLO optical system and an OCT optical system which irradiate a fundus with light from a light source via the objective optical system and receive fundus reflected light. The fundus imaging device further includes a correction mirror as a part of the objective optical system, or between the objective optical system and the SLO optical system or the OCT optical system. The correction mirror corrects an eccentric aberration which occurs due to eccentric arrangement of the plurality of mirrors.
    Type: Application
    Filed: March 28, 2018
    Publication date: October 11, 2018
    Applicant: NIDEK CO., LTD.
    Inventors: Go MATSUNOBU, Joji SASAKI, Masaaki HANEBUCHI
  • Patent number: 10076243
    Abstract: An ophthalmic imaging device for capturing a tomographic image of an eye, includes: an OCT optical system detecting interference of reference light and measurement light; a measurement optical system including an optical scanner and an objective optical system, the optical scanner being configured to deflect the measurement light to perform scanning with the measurement light; a driver configured to displace a relative position of the optical scanner with respect to the objective optical system in an optical axis direction; and a controller configured to control the driver to adjust a turning position of the measurement light in the optical axis direction. The controller changes the turning position between a first position corresponding to a first depth band of the eye and a second position corresponding to a second depth band of the eye which is different from the first depth band.
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: September 18, 2018
    Assignee: NIDEK CO., LTD.
    Inventors: Keiji Murata, Masaaki Hanebuchi, Masakazu Endo
  • Publication number: 20180256022
    Abstract: A subjective optometry apparatus includes a light projecting optical system that projects a target light flux to an examinee's eye, a fixed optical element that guides an image of the target light flux to the examinee's eye so as to have an optically predetermined examination length, a calibration optical system disposed in an optical path of the light projecting optical system to change optical characteristics of the examinee's eye, a measurement unit that accommodates the light projecting optical system; a positional information acquiring portion that acquires positional information of the measurement unit, a correction amount setting portion that sets a correction amount for correcting a projection magnification of the target light flux projected to the examinee's eye, based on the positional information, and a correction portion that corrects the projection magnification of the target light flux based on the correction amount set by the correction amount setting portion.
    Type: Application
    Filed: March 6, 2018
    Publication date: September 13, 2018
    Applicant: NIDEK CO., LTD.
    Inventors: Michihiro TAKII, Masaaki HANEBUCHI, Hisashi OCHI, Sasagu TACHIBANA
  • Patent number: 10010451
    Abstract: An ophthalmic laser surgical apparatus includes an XY scan unit, a light guiding optical element, an objective lens, and a Z scan unit. The XY scan unit includes a deflecting device for deflecting the pulsed laser beam, and scans the pulsed laser beam in a direction crossing an optical axis. The light guiding optical element is provided downstream of the deflecting device on the optical path of the pulsed laser beam. The light guiding optical element has refractive power, and guides the pulsed laser beam. The objective lens causes the pulsed laser beam through the XY scan unit and the light guiding optical element to converge in a tissue of a patient's eye. The Z scan unit varies the optical path length between the light guiding optical element and the objective lens while the objective lens is fixed in position on the optical path.
    Type: Grant
    Filed: August 15, 2014
    Date of Patent: July 3, 2018
    Assignee: NIDEK CO., LTD.
    Inventors: Masaaki Hanebuchi, Naho Murakami, Takayoshi Shibata, Shinya Iwata
  • Publication number: 20180172426
    Abstract: An optical coherence tomography device provided with: an OCT optical system configured to output OCT signal; and an analysis processing unit configured to process the OCT signal and generate motion contrast data of the specimen. The analysis processing unit is provided with: a first image data generation unit configured to process multiple OCT signals to generate first image data representing phase difference information of the multiple OCT signals, and a second image data generation unit configured to process the OCT signal to generate second image data representing amplitude information of the OCT signal. The analysis processing unit generates the motion contrast data based on the phase difference information in the first image data and the amplitude information in the second image data.
    Type: Application
    Filed: February 20, 2018
    Publication date: June 21, 2018
    Applicant: NIDEK CO., LTD.
    Inventors: Naoki TAKENO, Masaaki HANEBUCHI, Yasuhiro FURUUCHI, Hajime NAMIKI
  • Publication number: 20180135962
    Abstract: An OCT apparatus includes: a light source unit that includes first and second wavelength sweeping light sources which sequentially emit light with first and second spectrum bandwidths; an SS-OCT optical system that splits the light into measurement light and reference light to receive interference signal light; a second detector that is a deviation detector detecting a phase deviation and a wavelength deviation and detects a signal including pieces of FPN; a calculation processor connecting first and second spectrum interference signals and processes the connected spectrum interference signals to acquire an OCT image and that obtains the phase deviation and the wavelength deviation; and a correction unit that corrects the phase deviation and the wavelength deviation and corrects the phase deviation and the wavelength deviation obtained by the calculation processor.
    Type: Application
    Filed: October 12, 2017
    Publication date: May 17, 2018
    Applicant: NIDEK CO., LTD.
    Inventors: Keiji MURATA, Masaaki HANEBUCHI
  • Patent number: 9933246
    Abstract: There is provided an optical coherence tomography device provided with: an OCT optical system configured to output OCT signal; and an analysis processing unit configured to process the OCT signal and generate motion contrast data of the specimen. The analysis processing unit is provided with: a first image data generation unit configured to process multiple OCT signals to generate first image data representing phase difference information of the multiple OCT signals, and a second image data generation unit configured to process the OCT signal to generate second image data representing amplitude information of the OCT signal. The analysis processing unit generates the motion contrast data based on the phase difference information in the first image data and the amplitude information in the second image data.
    Type: Grant
    Filed: December 11, 2014
    Date of Patent: April 3, 2018
    Assignee: NIDEK CO., LTD.
    Inventors: Naoki Takeno, Masaaki Hanebuchi, Yasuhiro Furuuchi, Hajime Namiki