Patents by Inventor Kazuro Yamada

Kazuro Yamada 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: 9429414
    Abstract: The present invention relates to an apparatus having a simple configuration capable of correctly detecting malfunction of an OCT apparatus by detecting the states of a light source and a sensor. An image pickup apparatus includes a switching unit that switches between a first mode in which a combined light beam of a return light beam from a specimen and a reference light beam is detectable by a detecting unit and a second mode in which the reference light beam is detectable by the detecting unit. The image pickup apparatus is switchable to the first mode on the basis of an intensity of the reference light beam detected by the detecting unit in the second mode.
    Type: Grant
    Filed: June 15, 2010
    Date of Patent: August 30, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Nobuhito Suehira, Kazuro Yamada, Norihiko Utsunomiya, Takashi Naba, Ryoji Kurosaka, Kei Suzuki
  • Patent number: 9226655
    Abstract: An image processing apparatus includes an obtaining unit configured to obtain a tomographic image including an optic disc portion and a macula portion of a fundus of a subject's eye, an analysis unit configured to analyze the optic disc portion and the macula portion of the fundus in the tomographic image, and a display control unit configured to display side-by-side, on a display unit, a display pattern indicating a result of analyzing the optic disc portion, and a display pattern indicating a result of analyzing the macula portion.
    Type: Grant
    Filed: March 27, 2013
    Date of Patent: January 5, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshihiko Iwase, Tomoyuki Makihira, Kazuhide Miyata, Makoto Sato, Kazuro Yamada, Ritsuya Tomita, Daisuke Kibe, Hiroyuki Shinbata
  • Patent number: 9170087
    Abstract: An optical coherence tomography imaging apparatus that acquires a tomographic image from interference light between a reference beam and a measuring beam obtained via an object includes a control unit configured to control a difference in optical path length between the reference beam and the measuring beam by a control method according to an imaging target region, and a signal processing unit configured to generate image data of the object based on an electrical signal obtained by detecting the interference light with the difference in optical path length controlled by the control method.
    Type: Grant
    Filed: March 26, 2013
    Date of Patent: October 27, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tomoyuki Makihira, Kazuhide Miyata, Makoto Sato, Yoshihiko Iwase, Kazuro Yamada, Ritsuya Tomita, Yohei Minatoya, Daisuke Kibe, Hiroyuki Shinbata
  • Patent number: 9157726
    Abstract: An optical coherence tomographic imaging apparatus including a planar image obtaining unit configured to obtain a planar image of a subject based on a return beam from the subject irradiated by the irradiation unit that irradiates the subject with light of a first wavelength band, a tomographic image obtaining unit configured to obtain a tomographic image of the subject based on a beam in which a return beam from the subject irradiated with the laser beam emitted while sweeping a second wavelength range which is longer than the first wavelength band and a reference beam corresponding to the laser beam are combined, and a correction unit configured to correct an optical path length difference generated due to a difference between the first wavelength band and the second wavelength band.
    Type: Grant
    Filed: March 27, 2013
    Date of Patent: October 13, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tomoyuki Makihira, Yoshihiko Iwase, Kazuhide Miyata, Makoto Sato, Kazuro Yamada, Ritsuya Tomita, Daisuke Kibe, Hiroyuki Shinbata
  • Patent number: 9138141
    Abstract: An ophthalmologic apparatus includes an irradiation optical system configured to guide light emitted from a light source to the subject's eye, a control unit configured to sweep a wavelength of light emitted from the light source, an imaging optical system configured to guide to an imaging unit a return beam from the subject's eye of light swept by the control unit, a tomographic image acquisition unit configured to acquire a tomographic image of the subject's eye based on an output from the imaging unit, a fundus image acquisition unit configured to acquire a fundus image of the subject's eye, and a display control unit configured to display the fundus image on a first area in a display unit and display the tomographic image on a second display area which is positioned above or below the first area and is wider in a horizontal direction as compared to the first area.
    Type: Grant
    Filed: March 27, 2013
    Date of Patent: September 22, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tomoyuki Makihira, Kazuhide Miyata, Makoto Sato, Yoshihiko Iwase, Kazuro Yamada, Ritsuya Tomita, Daisuke Kibe, Hiroyuki Shinbata
  • Patent number: 9125598
    Abstract: Provided is an optical coherence tomography apparatus for obtaining a tomographic image from an interference light between a reference light and a measurement light having passed through an object. The optical coherence tomography apparatus includes: a storage unit for storing information of a display mode of an imaging screen when the object is imaged; and a control unit for displaying an imaging screen of a display mode, based on the information stored in the imaging, as an initial screen, when the object is imaged after storage in the storage unit.
    Type: Grant
    Filed: April 2, 2013
    Date of Patent: September 8, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tomoyuki Makihira, Makoto Sato, Kazuhide Miyata, Yoshihiko Iwase, Kazuro Yamada, Ritsuya Tomita, Yohei Minatoya, Daisuke Kibe, Hiroyuki Shinbata
  • Patent number: 8807750
    Abstract: Provided is an image acquisition apparatus for acquiring a 3D retinal image with high resolution, which is capable of reducing a time period required for data transmission. In the image acquisition apparatus: a blink of a subject is detected; acquisition of image taking data is suspended thereafter until a line of sight becomes stable; and the data transmission to a computer is started at a timing at which a blink has been detected, thereby avoiding acquiring unnecessary data, allowing a capacity of a data buffer to be smaller, and making the data transmission efficient.
    Type: Grant
    Filed: July 1, 2011
    Date of Patent: August 19, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takashi Naba, Kazuro Yamada
  • Patent number: 8797544
    Abstract: An optical tomographic imaging device and the like which suppress influence in the case of a measuring beam being truncated by an iris, and can ensure reliability of a tomographic image which is acquired, when imaging the tomographic image of a retina in an eyeground of an examined eye. An optical tomographic imaging device is configured to have an observation unit observing a state of irradiating an examined object with the measuring beam, and imaging a state of the measuring beam being incident on the examined object as an observation image, a recording unit recording the observation image by linking the observation image with a tomographic image by the optical tomographic imaging device, and an evaluating unit evaluating reliability of the tomographic image which is linked with the observation image based on the observation image imaged in the observation unit.
    Type: Grant
    Filed: May 12, 2009
    Date of Patent: August 5, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Futoshi Hirose, Kazuhide Miyata, Kazuro Yamada
  • Publication number: 20130258283
    Abstract: An ophthalmologic apparatus includes an ophthalmologic apparatus configured to acquire unique information of a subject's eye, an acquisition unit configured to acquire a value indicating brightness of surroundings of the ophthalmologic apparatus, and a recording unit configured to record in a storing unit a value indicating brightness acquired by the acquisition unit, associated with a tomographic image.
    Type: Application
    Filed: March 27, 2013
    Publication date: October 3, 2013
    Inventors: Atsushi Goto, Kazuhide Miyata, Makoto Sato, Tomoyuki Makihira, Yoshihiko Iwase, Kazuro Yamada, Ritsuya Tomita, Daisuke Kibe, Hiroyuki Shinbata
  • Publication number: 20130258285
    Abstract: An image processing apparatus includes an obtaining unit configured to obtain a tomographic image including an optic disc portion and a macula portion of a fundus of a subject's eye, an analysis unit configured to analyze the optic disc portion and the macula portion of the fundus in the tomographic image, and a display control unit configured to display side-by-side, on a display unit, a display pattern indicating a result of analyzing the optic disc portion, and a display pattern indicating a result of analyzing the macula portion.
    Type: Application
    Filed: March 27, 2013
    Publication date: October 3, 2013
    Inventors: Yoshihiko Iwase, Tomoyuki Makihira, Kazuhide Miyata, Makoto Sato, Kazuro Yamada, Ritsuya Tomita, Daisuke Kibe, Hiroyuki Shinbata
  • Publication number: 20130258284
    Abstract: An ophthalmologic apparatus includes an irradiation optical system configured to guide light emitted from a light source to the subject's eye, a control unit configured to sweep a wavelength of light emitted from the light source, an imaging optical system configured to guide to an imaging unit a return beam from the subject's eye of light swept by the control unit, a tomographic image acquisition unit configured to acquire a tomographic image of the subject's eye based on an output from the imaging unit, a fundus image acquisition unit configured to acquire a fundus image of the subject's eye, and a display control unit configured to display the fundus image on a first area in a display unit and display the tomographic image on a second display area which is positioned above or below the first area and is wider in a horizontal direction as compared to the first area.
    Type: Application
    Filed: March 27, 2013
    Publication date: October 3, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Tomoyuki Makihira, Kazuhide Miyata, Makoto Sato, Yoshihiko Iwase, Kazuro Yamada, Ritsuya Tomita, Daisuke Kibe, Hiroyuki Shinbata
  • Publication number: 20130258349
    Abstract: An optical coherence tomography imaging apparatus that acquires a tomographic image from interference light between a reference beam and a measuring beam obtained via an object includes a control unit configured to control a difference in optical path length between the reference beam and the measuring beam by a control method according to an imaging target region, and a signal processing unit configured to generate image data of the object based on an electrical signal obtained by detecting the interference light with the difference in optical path length controlled by the control method.
    Type: Application
    Filed: March 26, 2013
    Publication date: October 3, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Tomoyuki Makihira, Kazuhide Miyata, Makoto Sato, Yoshihiko Iwase, Kazuro Yamada, Ritsuya Tomita, Yohei Minatoya, Daisuke Kibe, Hiroyuki Shinbata
  • Publication number: 20130258282
    Abstract: An ophthalmologic apparatus includes an obtaining unit configured to obtain an anterior segment image of a subject's eye, a tomographic image obtaining unit configured to obtain a tomographic image of an anterior segment of the subject's eye, a calculation unit configured to calculate a thickness of a cornea based on the tomographic image, and a display control unit configured to cause a display unit to display the anterior segment image, a closed curve on the anterior segment image, and a smallest thickness of the cornea among thicknesses of the cornea in a portion where the closed curve lies.
    Type: Application
    Filed: March 26, 2013
    Publication date: October 3, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Atsushi Goto, Kazuhide Miyata, Makoto Sato, Tomoyuki Makihira, Yoshihiko Iwase, Kazuro Yamada, Ritsuya Tomita, Yohei Minatoya, Daisuke Kibe, Hiroyuki Shinbata
  • Publication number: 20130258350
    Abstract: An optical coherence tomographic imaging apparatus including a planar image obtaining unit configured to obtain a planar image of a subject based on a return beam from the subject irradiated by the irradiation unit that irradiates the subject with light of a first wavelength band, a tomographic image obtaining unit configured to obtain a tomographic image of the subject based on a beam in which a return beam from the subject irradiated with the laser beam emitted while sweeping a second wavelength range which is longer than the first wavelength band and a reference beam corresponding to the laser beam are combined, and a correction unit configured to correct an optical path length difference generated due to a difference between the first wavelength band and the second wavelength band.
    Type: Application
    Filed: March 27, 2013
    Publication date: October 3, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Tomoyuki Makihira, Yoshihiko Iwase, Kazuhide Miyata, Makoto Sato, Kazuro Yamada, Ritsuya Tomita, Daisuke Kibe, Hiroyuki Shinbata
  • Publication number: 20130258286
    Abstract: An optical coherence tomography imaging apparatus that captures a tomographic image of a subject's eye using interference light based on light from a wavelength-swept light source includes a region acquisition unit configured to acquire an imaging target region, a display control unit configured to display information about the acquired imaging target region, and an imaging unit configured to capture a tomographic image by scanning the imaging target region in the subject's eye using light from the wavelength-swept light source.
    Type: Application
    Filed: March 13, 2013
    Publication date: October 3, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Yoshihiko Iwase, Kazuhide Miyata, Makoto Sato, Tomoyuki Makihira, Kazuro Yamada, Ritsuya Tomita, Yohei Minatoya, Daisuke Kibe, Hiroyuki Shinbata
  • Patent number: 8390818
    Abstract: A beam diameter varying portion varies a first beam diameter of a measuring beam incident on an optical portion to a second beam diameter larger than the first beam diameter. An adjustment portion adjusts a condensing position of the measuring beam on the optical portion based on intensity information of a return beam from a position of an inspection object with the first beam diameter. The beam diameter is varied from the first to the second beam diameter by the beam diameter varying portion at the position adjusted by the adjustment portion to cause the measuring beam having the second beam diameter to be incident. A condensing position can be adjusted in a relatively short time because the measuring beam small in beam diameter is used, and a combined beam can be acquired with high transverse resolution because the measuring beam large in beam diameter is used.
    Type: Grant
    Filed: May 7, 2009
    Date of Patent: March 5, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Futoshi Hirose, Kazuro Yamada, Kazuhide Miyata, Kenji Muto, Nobuhiro Tomatsu
  • Publication number: 20120092677
    Abstract: The present invention relates to an apparatus having a simple configuration capable of correctly detecting malfunction of an OCT apparatus by detecting the states of a light source and a sensor. An image pickup apparatus includes a switching unit that switches between a first mode in which a combined light beam of a return light beam from a specimen and a reference light beam is detectable by a detecting unit and a second mode in which the reference light beam is detectable by the detecting unit. The image pickup apparatus is switchable to the first mode on the basis of an intensity of the reference light beam detected by the detecting unit in the second mode.
    Type: Application
    Filed: June 15, 2010
    Publication date: April 19, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Nobuhito Suehira, Kazuro Yamada, Norihiko Utsunomiya, Takashi Naba, Ryoji Kurosaka, Kei Suzuki
  • Publication number: 20120013848
    Abstract: Provided is an image acquisition apparatus for acquiring a 3D retinal image with high resolution, which is capable of reducing a time period required for data transmission. In the image acquisition apparatus: a blink of a subject is detected; acquisition of image taking data is suspended thereafter until a line of sight becomes stable; and the data transmission to a computer is started at a timing at which a blink has been detected, thereby avoiding acquiring unnecessary data, allowing a capacity of a data buffer to be smaller, and making the data transmission efficient.
    Type: Application
    Filed: July 1, 2011
    Publication date: January 19, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Takashi Naba, Kazuro Yamada
  • Publication number: 20110301455
    Abstract: Provided is an optical tomographic imaging apparatus that, at imaging a tomographic image in an OCT system with a high lateral resolution, can more reduce blurring in the image due to movement of an object, including: a scanning device for scanning, on the object, a first irradiation beam having a large spot diameter and a second irradiation beam having a small spot diameter synchronized with each other, an image information acquiring device for acquiring first and second image information obtained with the irradiation beams, respectively, by scanning the first and second irradiation beams, and a position correcting device for identifying a position of the first image information based on reference image information acquired in advance, and, based on correlation of a positional relation between the first and second image information, correcting a position of the second image information by associating the position with the identified first image information's position.
    Type: Application
    Filed: February 24, 2010
    Publication date: December 8, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Yasuyuki Numajiri, Kazuro Yamada, Futoshi Hirose
  • Publication number: 20100321700
    Abstract: A beam diameter varying portion varies a first beam diameter of a measuring beam incident on an optical portion to a second beam diameter larger than the first beam diameter. An adjustment portion adjusts a condensing position of the measuring beam on the optical portion based on intensity information of a return beam from a position of an inspection object with the first beam diameter. The beam diameter is varied from the first to the second beam diameter by the beam diameter varying portion at the position adjusted by the adjustment portion to cause the measuring beam having the second beam diameter to be incident. A condensing position can be adjusted in a relatively short time because the measuring beam small in beam diameter is used, and a combined beam can be acquired with high transverse resolution because the measuring beam large in beam diameter is used.
    Type: Application
    Filed: May 7, 2009
    Publication date: December 23, 2010
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Futoshi Hirose, Kazuro Yamada, Kazuhide Miyata, Kenji Muto, Nobuhiro Tomatsu