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).
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Patent number: 10226175Abstract: 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: GrantFiled: October 27, 2016Date of Patent: March 12, 2019Assignee: KABUSHIKI KAISHA TOPCONInventors: Jun Sakai, Makoto Fujino, Keisuke Arima, Ryoichi Yahagi
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Patent number: 10149615Abstract: 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: GrantFiled: November 27, 2013Date of Patent: December 11, 2018Assignee: KABUSHIKI KAISHA TOPCONInventors: Jun Sakai, Makoto Fujino, Keisuke Arima, Ryoichi Yahagi
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Publication number: 20170042422Abstract: 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: ApplicationFiled: October 27, 2016Publication date: February 16, 2017Applicant: KABUSHIKI KAISHA TOPCONInventors: Jun SAKAI, Makoto Fujino, Keisuke Arima, Ryoichi Yahagi
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Publication number: 20150313467Abstract: 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: ApplicationFiled: November 27, 2013Publication date: November 5, 2015Applicant: KABUSHIKI KAISHA TOPCONInventors: Jun SAKAI, Makoto FUJINO, Keisuke ARIMA, Ryoichi YAHAGI
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Publication number: 20130128226Abstract: 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: ApplicationFiled: July 25, 2011Publication date: May 23, 2013Applicant: KABUSHIKI KAISHA TOPCONInventors: Ryoichi Yahagi, Wataru Oyagi, Hiroyuki Otsuka
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Patent number: 7506982Abstract: 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: GrantFiled: October 30, 2007Date of Patent: March 24, 2009Assignee: Kabushiki Kaisha TOPCONInventors: Ryoichi Yahagi, Hiroyuki Ootsuka, Takanori Takeda
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Publication number: 20080100801Abstract: 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: ApplicationFiled: October 30, 2007Publication date: May 1, 2008Applicant: Kabushiki Kaisha TOPCONInventors: Ryoichi Yahagi, Hiroyuki Ootsuka, Takanori Takeda