Patents by Inventor Masahiro Shibutani

Masahiro Shibutani 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: 11213202
    Abstract: An ophthalmologic apparatus includes an SLO system, a projection system, a first image former, a second image former, a displacement processor, and a controller. The SLO system is configured to scan a target eye with first light deflected by an first optical scanner. The projection system is configured to project second light deflected by an second optical scanner onto the target eye. The first image former is configured to form a first image of the target eye based on a scan result of a first scan region using the first optical scanner. The second image former is configured to form a second image of the target eye based on a scan result of a second scan region using the first optical scanner, the second scan region being narrower than the first scan region. The displacement processor is configured to calculate a displacement between a partial image in the first image and the second image, the partial image corresponding to the second image.
    Type: Grant
    Filed: September 26, 2019
    Date of Patent: January 4, 2022
    Assignee: TOPCON CORPORATION
    Inventors: Masahiro Shibutani, Tatsuo Yamaguchi, Toshihiro Mino, Ryoichi Hirose
  • Patent number: 10667684
    Abstract: An optical coherence tomography (OCT) apparatus according to an embodiment is configured to split light from a light source into measurement light and reference light, project the measurement light on an object, and detect interference light generated from the reference light and the measurement light returning from the object. The OCT apparatus includes a dispersion unit and an information generation unit. The dispersion unit is configured to relatively change a dispersion characteristic of a measurement optical path which is an optical path of the measurement light and a dispersion characteristic of a reference optical path which is an optical path of the reference light, according to an operation mode corresponding to a depth range. The information generation unit is configured to generate information on the object according to the operation mode, based on a detection result of the interference light.
    Type: Grant
    Filed: August 7, 2017
    Date of Patent: June 2, 2020
    Assignee: TOPCON CORPORATION
    Inventors: Masahiro Shibutani, Ryoichi Hirose, Toshihiro Mino
  • Publication number: 20200015675
    Abstract: An ophthalmologic apparatus includes an SLO system, a projection system, a first image former, a second image former, a displacement processor, and a controller. The SLO system is configured to scan a target eye with first light deflected by an first optical scanner. The projection system is configured to project second light deflected by an second optical scanner onto the target eye. The first image former is configured to form a first image of the target eye based on a scan result of a first scan region using the first optical scanner. The second image former is configured to form a second image of the target eye based on a scan result of a second scan region using the first optical scanner, the second scan region being narrower than the first scan region. The displacement processor is configured to calculate a displacement between a partial image in the first image and the second image, the partial image corresponding to the second image.
    Type: Application
    Filed: September 26, 2019
    Publication date: January 16, 2020
    Applicant: TOPCON CORPORATION
    Inventors: Masahiro SHIBUTANI, Tatsuo YAMAGUCHI, Toshihiro MINO, Ryoichi HIROSE
  • Publication number: 20180084991
    Abstract: An optical coherence tomography (OCT) apparatus according to an embodiment is configured to split light from a light source into measurement light and reference light, project the measurement light on an object, and detect interference light generated from the reference light and the measurement light returning from the object. The OCT apparatus includes a dispersion unit and an information generation unit. The dispersion unit is configured to relatively change a dispersion characteristic of a measurement optical path which is an optical path of the measurement light and a dispersion characteristic of a reference optical path which is an optical path of the reference light, according to an operation mode corresponding to a depth range. The information generation unit is configured to generate information on the object according to the operation mode, based on a detection result of the interference light.
    Type: Application
    Filed: August 7, 2017
    Publication date: March 29, 2018
    Applicant: TOPCON CORPORATION
    Inventors: Masahiro SHIBUTANI, Ryoichi HIROSE, Toshihiro MINO
  • Patent number: 9498116
    Abstract: An ophthalmologic apparatus of an embodiment includes an optical system, a rotational movement amount calculator, a registration unit, a parallel movement amount calculator, a driver, and a controller. The optical system is used to capture a moving image of a subject's eye. The rotational movement amount calculator calculates a rotational movement amount between a first image and a second image included in the moving image. The registration unit performs registration between the first image and the second image in the rotation direction based on the rotational movement amount. The parallel movement amount calculator performs a phase only correlation process on the first image and the second image registered by the registration unit to calculate a parallel movement amount between the first image and the second image. The driver moves the optical system. The controller controls the driver based on the parallel movement amount.
    Type: Grant
    Filed: July 29, 2014
    Date of Patent: November 22, 2016
    Assignee: KABUSHIKI KAISHA TOPCON
    Inventors: Masahiro Shibutani, Hiroyuki Aoki
  • Publication number: 20160198940
    Abstract: An ophthalmologic apparatus of an embodiment includes an optical system, a rotational movement amount calculator, a registration unit, a parallel movement amount calculator, a driver, and a controller. The optical system is used to capture a moving image of a subject's eye. The rotational movement amount calculator calculates a rotational movement amount between a first image and a second image included in the moving image. The registration unit performs registration between the first image and the second image in the rotation direction based on the rotational movement amount. The parallel movement amount calculator performs a phase only correlation process on the first image and the second image registered by the registration unit to calculate a parallel movement amount between the first image and the second image. The driver moves the optical system. The controller controls the driver based on the parallel movement amount.
    Type: Application
    Filed: July 29, 2014
    Publication date: July 14, 2016
    Applicant: KABUSHIKI KAISHA TOPCON
    Inventors: Masahiro SHIBUTANI, Hiroyuki AOKI
  • Patent number: 9275283
    Abstract: To provide the status of the cribrosa lamina of an eye of a living body as diagnostic material. A tomographic image forming part 232 of a fundus observing device 1 forms a horizontal tomographic image Wi based on a three-dimensional image V of a fundus Ef. A cribrosa-lamina region specifying part 233 specifies a cribrosa-lamina region Uj by analyzing the horizontal tomographic image Wi. A hole region specifying part 234 specifies a hole region Pk in the cribrosa-lamina region Uj by analyzing the horizontal tomographic image Wi. The distribution information generating part 235 generates distribution information representing the distribution of the hole region Pk in the cribrosa-lamina region Uj based on the specifying results of the cribrosa-lamina region Uj and the hole region Pk. This distribution information is displayed by a display 240.
    Type: Grant
    Filed: September 14, 2011
    Date of Patent: March 1, 2016
    Assignee: KABUSHIKI KAISHA TOPCON
    Inventor: Masahiro Shibutani
  • Publication number: 20130093870
    Abstract: To provide the status of the cribrosa lamina of an eye of a living body as diagnostic material. A tomographic image forming part 232 of a fundus observing device 1 forms a horizontal tomographic image Wi based on a three-dimensional image V of a fundus Ef. A cribrosa-lamina region specifying part 233 specifies a cribrosa-lamina region Uj by analyzing the horizontal tomographic image Wi. A hole region specifying part 234 specifies a hole region Pk in the cribrosa-lamina region Uj by analyzing the horizontal tomographic image Wi. The distribution information generating part 235 generates distribution information representing the distribution of the hole region Pk in the cribrosa-lamina region Uj based on the specifying results of the cribrosa-lamina region Uj and the hole region Pk. This distribution information is displayed by a display 240.
    Type: Application
    Filed: September 14, 2011
    Publication date: April 18, 2013
    Applicant: Kabushiki Kaisha Topcon
    Inventor: Masahiro Shibutani
  • Patent number: 7261416
    Abstract: An eye's optical characteristics measuring system, comprising a target projecting means for projecting a target image on a fundus of an eye under test, a photodetecting means for guiding the target image toward a photoelectric detector, a pupil diameter measuring means, a calculating means for calculating optical characteristics of the eye under test according to distribution of optical intensity obtained based on an image acquired by the photoelectric detector, and an aperture selecting means provided on each of the target projecting means and the photodetecting means, wherein the aperture selecting means is independently driven, and apertures to restrict a projecting luminous flux and a photodetecting luminous flux are selected based on a pupil diameter of the eye under test measured by the pupil diameter measuring means.
    Type: Grant
    Filed: February 13, 2006
    Date of Patent: August 28, 2007
    Assignee: Kabushiki Kaisha TOPCON
    Inventors: Kouji Nishio, Gaku Takeuchi, Masahiro Shibutani, Katsuhiko Kobayashi
  • Publication number: 20070052927
    Abstract: A simulation image of an index image formed on a fundus of an eye to be examined when each of a plurality of indices is presented to the eye to be examined is generated based on optical characteristic data of the eye to be examined and image data of the indices associated with respective spatial frequencies. Of the generated simulation images, simulation images whose contrasts can be recognized by the eye to be examined are selected at each of the spatial frequencies. Of the selected simulation images, a simulation image in which a contrast of an index being a basis for the simulation image is minimum is specified. Mark information for marking index information of indices which are the bases for simulation images specified at each of the spatial frequencies are added to image data of an examination sheet and displayed thereon.
    Type: Application
    Filed: August 30, 2006
    Publication date: March 8, 2007
    Applicant: KABUSHIKI KAISHA TOPCON
    Inventors: Toru Noda, Masahiro Shibutani, Wataru Ooyagi
  • Publication number: 20060215112
    Abstract: An eye's optical characteristics measuring system, comprising a target projecting means for projecting a target image on a fundus of an eye under test, a photodetecting means for guiding the target image toward a photoelectric detector, a pupil diameter measuring means, a calculating means for calculating optical characteristics of the eye under test according to distribution of optical intensity obtained based on an image acquired by the photoelectric detector, and an aperture selecting means provided on each of the target projecting means and the photodetecting means, wherein the aperture selecting means is independently driven, and apertures to restrict a projecting luminous flux and a photodetecting luminous flux are selected based on a pupil diameter of the eye under test measured by the pupil diameter measuring means.
    Type: Application
    Filed: February 13, 2006
    Publication date: September 28, 2006
    Inventors: Kouji Nishio, Gaku Takeuchi, Masahiro Shibutani, Katsuhiko Kobayashi
  • Patent number: 7011411
    Abstract: An eye's optical characteristic measuring system, comprising a target projecting system for projecting a target image to an ocular fundus of an eye under test, a photodetection optical system for guiding the target image to a photoelectric detector, a simulation image calculating unit for calculating images of the target image to be formed when a plurality of target images of different sizes are independently projected to the fundus of the eye under test based on light amount intensity distribution of the target image detected at the photoelectric detector, and a visual acuity calculating unit having a predetermined threshold value and used for detecting light amount distribution characteristics from each of the light amount intensity distribution in a predetermined longitudinal direction of a plurality of target images calculated at the simulation image calculating unit and for calculating a visual acuity value of a person under test from an intersection of the light amount distribution characteristics and t
    Type: Grant
    Filed: February 11, 2003
    Date of Patent: March 14, 2006
    Assignee: Kabushiki Kaisha TOPCON
    Inventors: Masahiro Shibutani, Katsuhiko Kobayashi, Gaku Takeuchi, Yumi Kubotera
  • Patent number: 6824269
    Abstract: An eye's optical characteristic measuring system comprises an aperture diaphragm 14 arranged at a position approximately conjugate to a pupil of an eye 1 under testing and for determining regions to pass a light beam on the pupil 18, a projection optical system 2 for projecting a primary index image on a fundus of the eye under testing via the aperture diaphragm, a photodetection optical system 3 for forming a secondary index image on a photoelectric detector 21 via the aperture diaphragm by a reflected light beam from the fundus of the eye under testing, and detecting units 26, 27 and 28 for detecting a light amount intensity distribution of the secondary index image based on a signal from the photoelectric detector.
    Type: Grant
    Filed: October 5, 2001
    Date of Patent: November 30, 2004
    Assignee: Kabushiki Kaisha TOPCON
    Inventors: Gaku Takeuchi, Katsuhiko Kobayashi, Masahiro Shibutani
  • Patent number: 6789899
    Abstract: The eye's optical characteristic measuring system of the present invention comprises a projection system 2 for projecting a primary index image on fundus of an eye under testing, a photodetection system 3 for forming a secondary index image on a photoelectric detector 21 from a reflection light beam of the primary index image, detection systems 26, 27 and 28 for measuring a light amount intensity distribution characteristic of the secondary index image based on a signal from the photoelectric detector, a correction optical system 12 arranged in an optical path shared in common with the photodetection system and the detection system and for focusing the primary index image on the fundus of the eye under testing in corrected condition according to ocular refractive characteristic of the eye under testing, and a light beam switching means 13 for switching over to a first condition to guide the reflection light beam including the scattering reflection light beam from the fundus of the eye under testing to th
    Type: Grant
    Filed: October 5, 2001
    Date of Patent: September 14, 2004
    Assignee: Kabushiki Kaisha TOPCON
    Inventors: Katsuhiko Kobayashi, Gaku Takeuchi, Masahiro Shibutani
  • Patent number: 6676258
    Abstract: The invention provides an apparatus which detects light quantity distribution characteristics of a measuring target image projected to a fundus of an eye to be inspected and measures eye optical characteristics from the light quantity distribution characteristics. A projecting optical system has a light source and projects a measurement target to a fundus of an eye to be inspected by bundle of rays emitted from the light source, and a light receiving optical system condenses the bundle of rays reflected from the fundus of the eye. A photoelectric detector detects light quantity distribution characteristics of an image formed by the light receiving optical system, and an arithmetic unit measures eye optical characteristics of the eye based on a signal output from the photoelectric detector. A deflecting optical member for deflecting bundle of rays incident into both optical paths of the projecting optical system and the light receiving optical system is arranged so as to be rotatable.
    Type: Grant
    Filed: June 1, 2001
    Date of Patent: January 13, 2004
    Assignee: Kabushiki Kaisha Topcon
    Inventors: Gaku Takeuchi, Naoki Nakazawa, Masahiro Shibutani, Katsuhiko Kobayashi
  • Patent number: 6623117
    Abstract: An eye's optical characteristic measuring system, comprising an index projection system 2 for projecting an index image on a fundus of an eye under testing, a photodetection optical system 3 for guiding the index image toward a photoelectric detector, a simulation image calculating unit 28 for calculating each of images of target images formed when a plurality of target images different in size are respectively projected on the fundus of the eye under testing based on a light amount intensity distribution of the index image detected on the photoelectric detector, and a visual acuity calculating unit 28 for calculating a visual acuity value of the eye under testing, wherein the simulation image calculating unit calculates light amount intensity distributions in each of predetermined meridian directions of the images of the target images, and the visual acuity calculating unit detects a plurality of light amount intensity distribution values based on the light amount intensity distributions and calculates
    Type: Grant
    Filed: November 7, 2001
    Date of Patent: September 23, 2003
    Assignee: Kabushiki Kaisha TOPCON
    Inventors: Masahiro Shibutani, Katsuhiko Kobayashi, Gaku Takeuchi
  • Publication number: 20030156256
    Abstract: An eye's optical characteristic measuring system, comprising a target projecting system for projecting a target image on an ocular fundus of an eye under test, a photodetection optical system for guiding the target image to a photoelectric detector, a calculating unit for calculating an optical transmission function of the eye under test based on light amount intensity distribution of the target image detected by the photoelectric detector, and an arithmetic unit for calculating visual acuity of a person under test from intersection of the optical transmission function and a predetermined threshold value.
    Type: Application
    Filed: February 11, 2003
    Publication date: August 21, 2003
    Inventors: Gaku Takeuchi, Katsuhiko Kobayashi, Masahiro Shibutani, Yumi Kubotera
  • Publication number: 20030156259
    Abstract: An eye's optical characteristic measuring system, comprising a target projecting system for projecting a target image to an ocular fundus of an eye under test, a photodetection optical system for guiding the target image to a photoelectric detector, a simulation image calculating unit for calculating images of the target image to be formed when a plurality of target images of different sizes are independently projected to the fundus of the eye under test based on light amount intensity distribution of the target image detected at the photoelectric detector, and a visual acuity calculating unit having a predetermined threshold value and used for detecting light amount distribution characteristics from each of the light amount intensity distribution in a predetermined longitudinal direction of a plurality of target images calculated at the simulation image calculating unit and for calculating a visual acuity value of a person under test from an intersection of the light amount distribution characteristics and t
    Type: Application
    Filed: February 11, 2003
    Publication date: August 21, 2003
    Inventors: Masahiro Shibutani, Katsuhiko Kobayashi, Gaku Takeuchi, Yumi Kubotera
  • Publication number: 20020063849
    Abstract: The invention provides an apparatus which detects light quantity distribution characteristics of a measuring target image projected to a fundus of an eye to be inspected and measures eye optical characteristics from the light quantity distribution characteristics. A projecting optical system has a light source and projects a measurement target to a fundus of an eye to be inspected by bundle of rays emitted from the light source, and a light receiving optical system condenses the bundle of rays reflected from the fundus of the eye. A photoelectric detector detects light quantity distribution characteristics of an image formed by the light receiving optical system, and an arithmetic unit measures eye optical characteristics of the eye based on a signal output from the photoelectric detector. A deflecting optical member for deflecting bundle of rays incident into both optical paths of the projecting optical system and the light receiving optical system is arranged so as to rotatable.
    Type: Application
    Filed: June 1, 2001
    Publication date: May 30, 2002
    Inventors: Gaku Takeuchi, Noaki Nakazawa, Masahiro Shibutani, Katsuhiko Kobayashi
  • Publication number: 20020063851
    Abstract: An eye's optical characteristic measuring system, comprising an index projection system 2 for projecting an index image on a fundus of an eye under testing, a photodetection optical system 3 for guiding the index image toward a photoelectric detector, a simulation image calculating unit 28 for calculating each of images of target images formed when a plurality of target images different in size are respectively projected on the fundus of the eye under testing based on a light amount intensity distribution of the index image detected on the photoelectric detector, and a visual acuity calculating unit 28 for calculating a visual acuity value of the eye under testing, wherein the simulation image calculating unit calculates light amount intensity distributions in each of predetermined meridian directions of the images of the target images, and the visual acuity calculating unit detects a plurality of light amount intensity distribution values based on the light amount intensity distributions and calculates the v
    Type: Application
    Filed: November 7, 2001
    Publication date: May 30, 2002
    Inventors: Masahiro Shibutani, Katsuhiko Kobayashi, Gaku Takeuchi