Patents by Inventor Ryoichi Yahagi

Ryoichi Yahagi 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: 10226175
    Abstract: A fundus imaging apparatus includes a scanning optical system, a control circuit, and an image forming unit. The scanning optical system scans a fundus of a subject's eye with light from a light source, and receives return light from the fundus by a light receiver. The control circuit controls the scanning optical system such that a scanning locus is formed by the light in the fundus. The image forming unit forms an image of the fundus based on a light receiving signal from the light receiver and a position of the scanning locus. The control circuit is capable of performing an alignment mode, in which the control circuit controls the scanning optical system to project an alignment indicator for aligning the scanning optical system with the subject's eye on the fundus based on the light from the light source.
    Type: Grant
    Filed: October 27, 2016
    Date of Patent: March 12, 2019
    Assignee: KABUSHIKI KAISHA TOPCON
    Inventors: Jun Sakai, Makoto Fujino, Keisuke Arima, Ryoichi Yahagi
  • Patent number: 10149615
    Abstract: A fundus imaging apparatus includes a scanning optical system, a control circuit, and an image forming unit. The scanning optical system scans a fundus of a subject's eye with light from a light source, and receives return light from the fundus by a light receiver. The control circuit controls the scanning optical system such that a scanning locus is formed by the light in the fundus. The image forming unit forms an image of the fundus based on a light receiving signal from the light receiver and a position of the scanning locus. The control circuit is capable of performing an alignment mode, in which the control circuit controls the scanning optical system to project an alignment indicator for aligning the scanning optical system with the subject's eye on the fundus based on the light from the light source.
    Type: Grant
    Filed: November 27, 2013
    Date of Patent: December 11, 2018
    Assignee: KABUSHIKI KAISHA TOPCON
    Inventors: Jun Sakai, Makoto Fujino, Keisuke Arima, Ryoichi Yahagi
  • Publication number: 20170042422
    Abstract: A fundus imaging apparatus includes a scanning optical system, a control circuit, and an image forming unit. The scanning optical system scans a fundus of a subject's eye with light from a light source, and receives return light from the fundus by a light receiver. The control circuit controls the scanning optical system such that a scanning locus is formed by the light in the fundus. The image forming unit forms an image of the fundus based on a light receiving signal from the light receiver and a position of the scanning locus. The control circuit is capable of performing an alignment mode, in which the control circuit controls the scanning optical system to project an alignment indicator for aligning the scanning optical system with the subject's eye on the fundus based on the light from the light source.
    Type: Application
    Filed: October 27, 2016
    Publication date: February 16, 2017
    Applicant: KABUSHIKI KAISHA TOPCON
    Inventors: Jun SAKAI, Makoto Fujino, Keisuke Arima, Ryoichi Yahagi
  • Publication number: 20150313467
    Abstract: A fundus imaging apparatus includes a scanning optical system, a control circuit, and an image forming unit. The scanning optical system scans a fundus of a subject's eye with light from a light source, and receives return light from the fundus by a light receiver. The control circuit controls the scanning optical system such that a scanning locus is formed by the light in the fundus. The image forming unit forms an image of the fundus based on a light receiving signal from the light receiver and a position of the scanning locus. The control circuit is capable of performing an alignment mode, in which the control circuit controls the scanning optical system to project an alignment indicator for aligning the scanning optical system with the subject's eye on the fundus based on the light from the light source.
    Type: Application
    Filed: November 27, 2013
    Publication date: November 5, 2015
    Applicant: KABUSHIKI KAISHA TOPCON
    Inventors: Jun SAKAI, Makoto FUJINO, Keisuke ARIMA, Ryoichi YAHAGI
  • Publication number: 20130128226
    Abstract: An ophthalmologic imaging device includes an optical illumination system having a cornea aperture, an iris aperture, and a lens aperture and an split mark projection system for focusing on the fundus of the subject eye. A light source is controlled by a controller to emit light for being able to obtain at least two consecutive fundus images. An inner aperture image corresponding to the lens aperture is projected on the posterior surface of the lens. The controller controls the lens aperture so that for obtaining a second fundus image, the inner aperture image is projected at a position shifted relative to the optical axis of an optical observatory or imaging system from a position at which the aperture image is projected for obtaining a first fundus image.
    Type: Application
    Filed: July 25, 2011
    Publication date: May 23, 2013
    Applicant: KABUSHIKI KAISHA TOPCON
    Inventors: Ryoichi Yahagi, Wataru Oyagi, Hiroyuki Otsuka
  • Patent number: 7506982
    Abstract: An opthalmologic photographing apparatus which is used to observe and photograph a fundus oculi of an eye to be examined, includes an observation light source illuminating the eye to observe the fundus oculi of the eye, a photographing light source illuminating the eye to photograph an image of the fundus oculi of the eye, an aperture through which light illuminated from either the observation light source or the photographing light source and reflected on the fundus oculi of the eye is observed or photographed, and a control device which is configured to control an opening area of the aperture. The control device sets the opening area of the aperture to an opened observing opening area when observing the fundus oculi, and to a narrowed photographing opening area when photographing the image of the fundus oculi.
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: March 24, 2009
    Assignee: Kabushiki Kaisha TOPCON
    Inventors: Ryoichi Yahagi, Hiroyuki Ootsuka, Takanori Takeda
  • Publication number: 20080100801
    Abstract: An opthalmologic photographing apparatus which is used to observe and photograph a fundus oculi of an eye to be examined, includes an observation light source illuminating the eye to observe the fundus oculi of the eye, a photographing light source illuminating the eye to photograph an image of the fundus oculi of the eye, an aperture through which light illuminated from either the observation light source or the photographing light source and reflected on the fundus oculi of the eye is observed or photographed, and a control device which is configured to control an opening area of the aperture. The control device sets the opening area of the aperture to an opened observing opening area when observing the fundus oculi, and to a narrowed photographing opening area when photographing the image of the fundus oculi.
    Type: Application
    Filed: October 30, 2007
    Publication date: May 1, 2008
    Applicant: Kabushiki Kaisha TOPCON
    Inventors: Ryoichi Yahagi, Hiroyuki Ootsuka, Takanori Takeda