Patents by Inventor Yasufumi Fukuma

Yasufumi Fukuma 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: 10743762
    Abstract: An ophthalmologic apparatus according to the embodiments includes an OCT optical system, an alignment unit, an image forming unit, a first calculator, and a second calculator. The OCT optical system is configured to acquire OCT data of a fundus of a subject's eye by projecting measurement light onto the fundus. The alignment unit is configured to perform alignment of the OCT optical system with reference to a predetermined site of the subject's eye. The image forming unit is configured to form a tomographic image of the fundus based on the OCT data acquired by the OCT optical system which has been aligned by the alignment unit. The first calculator is configured to calculate a first tilt angle of the tomographic image. The second calculator is configured to calculate a second tilt angle of the fundus by correcting the first tilt angle based on alignment result of the OCT optical system with respect to the predetermined site by the alignment unit.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: August 18, 2020
    Assignee: TOPCON CORPORATION
    Inventors: Hitoshi Shimizu, Masashi Nakajima, Tony H. Ko, Jonathan Liu, Yasufumi Fukuma
  • Publication number: 20200214555
    Abstract: The object of the present invention is to develop an ophthalmologic microscope of a new method that increases the degree of freedom in the optical design in the Galilean ophthalmologic microscope provided with an OCT optical system. The present invention provides an ophthalmologic microscope 1 comprising; an illuminating optical system 300, an observation optical system 400; an objective lens 2; and an OCT optical system 500, characterized in that the optical axis 0-500 of the OCT optical system does not penetrate through the objective lens 2, it comprises objective lens for OCT 507 through which the optical axis 0-500 of the OCT optical system penetrates, and deflection optical elements 503a, 503b for scanning of the OCT optical system and the objective lens for OCT 507 are in a substantially optically conjugate positional relation.
    Type: Application
    Filed: May 2, 2018
    Publication date: July 9, 2020
    Applicant: Topcon Corporation
    Inventors: Yasufumi FUKUMA, Kazuhiro OOMORI
  • Publication number: 20200163545
    Abstract: An ophthalmologic apparatus of some exemplary embodiments includes an illumination system, interference photographing system, anterior eye segment photographing system, first optical path coupling element, and controller. The illumination system projects illumination light output from a light source, onto the anterior eye segment of a subject's eye. The interference photographing system performs photographing of an interference pattern formed on the cornea by the illumination light. The anterior eye segment photographing system performs photographing of the anterior eye segment onto which the illumination light is being projected. The first optical path coupling element couples the optical path of the interference photographing system and the optical path of the anterior eye segment photographing system with one another.
    Type: Application
    Filed: November 27, 2018
    Publication date: May 28, 2020
    Applicant: Topcon Corporation
    Inventors: Yasufumi Fukuma, Hideharu Suzuki, Zhenguo Wang, Kazuhiro Oomori, Makoto Fujino
  • Publication number: 20200163548
    Abstract: An illumination system of an ophthalmologic apparatus of an exemplary embodiment projects illumination light from a light source onto the anterior eye segment of a subject's eye. An interference photographing system photographs an interference pattern formed on the cornea by the illumination light. An anterior eye segment photographing system photographs the anterior eye segment onto which the illumination light is being projected. A first optical path coupling element couples the optical path of the interference photographing system and the optical path of the anterior eye segment photographing system with one another.
    Type: Application
    Filed: November 27, 2018
    Publication date: May 28, 2020
    Applicant: Topcon Corporation
    Inventors: Yasufumi Fukuma, Hideharu Suzuki, Zhenguo Wang, Kazuhiro Oomori, Makoto Fujino
  • Publication number: 20200100673
    Abstract: An ophthalmologic apparatus according to the embodiments includes an OCT optical system, an alignment unit, an image forming unit, a first calculator, and a second calculator. The OCT optical system is configured to acquire OCT data of a fundus of a subject's eye by projecting measurement light onto the fundus. The alignment unit is configured to perform alignment of the OCT optical system with reference to a predetermined site of the subject's eye. The image forming unit is configured to form a tomographic image of the fundus based on the OCT data acquired by the OCT optical system which has been aligned by the alignment unit. The first calculator is configured to calculate a first tilt angle of the tomographic image. The second calculator is configured to calculate a second tilt angle of the fundus by correcting the first tilt angle based on alignment result of the OCT optical system with respect to the predetermined site by the alignment unit.
    Type: Application
    Filed: September 28, 2018
    Publication date: April 2, 2020
    Applicant: TOPCON CORPORATION
    Inventors: Hitoshi SHIMIZU, Masashi Nakajima, Tony H. Ko, Jonathan Liu, Yasufumi Fukuma
  • Publication number: 20200085292
    Abstract: An ophthalmic apparatus of an exemplary aspect performs the first and second OCT scans on a subject's eye. The first OCT scan is performed on the first region including the first site of the subject's eye, and the second OCT scan is performed on the second region including the second site. The ophthalmic apparatus acquires the first deviation information of the subject's eye prior to the first OCT scan and performs alignment, and also acquires the second deviation information of the subject's eye prior to the second OCT scan and performs alignment. The ophthalmic apparatus calculates the distance between the first site and the second site based on the first data acquired through the first OCT scan and second data acquired through the second OCT scan.
    Type: Application
    Filed: September 12, 2019
    Publication date: March 19, 2020
    Applicant: TOPCON CORPORATION
    Inventors: Yasufumi FUKUMA, Takefumi HAYASHI, Yoko TATARA
  • Publication number: 20200077889
    Abstract: The object of the present invention is to develop an ophthalmologic microscope of a new method that increases the degree of freedom in the optical design in the Galilean ophthalmologic microscope provided with an OCT optical system. The present invention provides an ophthalmologic microscope 1, wherein an observation optical system 400, an objective lens 2, and an OCT optical system 500 are placed in such a way that the optical axis of the OCT optical system O-500 does not penetrate through objective lens 2, and the optical axis of the observation optical system O-400 and the optical axis of the OCT optical system O-500 are non-coaxial, and wherein the ophthalmologic microscope further comprises a SLO optical system 1500 that scans a light ray which is a visible ray, a near infrared ray, or an infrared ray and guides the light to the subject's eye so as to become substantially coaxial with the optical axis of the OCT optical system O-500.
    Type: Application
    Filed: May 25, 2018
    Publication date: March 12, 2020
    Applicant: Topcon Corporation
    Inventors: Yasufumi FUKUMA, Kazuhiro OOMORI
  • Patent number: 10456034
    Abstract: According to one embodiment, an ophthalmic microscope system includes an illumination system, a pair of light-receiving systems, and an irradiation system. The illumination system is configured to irradiate a subject's eye with illumination light. Each of the light-receiving systems includes a first objective lens and a first imaging device, and is configured to guide the illumination light returning from the subject's eye to the first imaging device through the first objective lens. The objective optical axes of the light-receiving systems are not parallel to each other. The irradiation system is configured to irradiate the subject's eye with light different from the illumination light from a direction different from the objective optical axes.
    Type: Grant
    Filed: February 22, 2016
    Date of Patent: October 29, 2019
    Assignee: KABUSHIKI KAISHA TOPCON
    Inventors: Yasufumi Fukuma, Kazuhiro Oomori, Satoshi Yamamoto
  • Publication number: 20190259163
    Abstract: A machine learning model is trained to identify the texture difference between the different layers of a multilayer object. By training with data in full 3D space, the resulting model is capable of predicting the probability that each pixel in a 3D image belongs to a certain layer. With the resulting probability map, comparing probabilities allows one to determine boundaries between layers, and/or other properties and useful information such as volume data.
    Type: Application
    Filed: February 15, 2019
    Publication date: August 22, 2019
    Inventors: Zaixing Mao, Zhenguo Wang, Kinpui Chan, Yasufumi Fukuma
  • Publication number: 20190029514
    Abstract: An ophthalmic system of an embodiment includes a slit lamp microscope and an information processing apparatus. The slit lamp microscope includes an image acquisition device that acquires a three dimensional image by photographing a subject's eye, and a first communication device that transmits the three dimensional image to the information processing apparatus. The information processing apparatus includes a second communication device that receives the three dimensional image transmitted by the first communication device, a display controller that displays a first image based on the three dimensional image on a display device, a partial region designation processor that designates a partial region of the first image, and a rendering processor that renders the three dimensional image based on the partial region to construct a second image. The display controller displays the second image on the display device.
    Type: Application
    Filed: July 26, 2018
    Publication date: January 31, 2019
    Applicant: TOPCON CORPORATION
    Inventors: Hisashi TSUKADA, Yasufumi FUKUMA
  • Patent number: 9962257
    Abstract: An intraocular lens system according to an embodiment includes a lens, a converter, and a driver. The lens is placed in the lens capsule, and configured to allow at least changes of the focal length. The converter is placed in the lens capsule, transmits part of incident light therethrough, and converts the energy of other part of the light into electrical energy. The driver is placed in the lens capsule, operates with the electrical energy obtained by the converter, and is used to change the focal length of the lens.
    Type: Grant
    Filed: July 29, 2014
    Date of Patent: May 8, 2018
    Assignee: KABUSHIKI KAISHA TOPCON
    Inventors: Yasufumi Fukuma, Hisashi Tsukada
  • Patent number: 9936870
    Abstract: In an embodiment, cross sectional image storage stores a cross sectional image group including multiple cross sectional images each of which is associated with time. Phase image storage stores a phase image group including multiple phase images each of which is associated with time. Blood flow information storage stores a blood flow information group including multiple blood flow information each of which is related to blood flow in a blood vessel of the living body and is associated with time. Display synchronously displays a cross sectional image included in the cross sectional image group and a phase image included in the phase image group using time associated with the cross sectional image and the phase image, and displays a blood flow image. The display performs the same change as the change to the change operation to the cross sectional image, the phase image and the blood flow image.
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: April 10, 2018
    Assignees: KABUSHIKI KAISHA TOPCON, National University Corporation ASAHIKAWA MEDICAL UNIVERITY
    Inventors: Akitoshi Yoshida, Masahiro Akiba, Yasufumi Fukuma, Hideaki Tokoro, Taiki Aimi, Shunsuke Nakamura
  • Publication number: 20180085212
    Abstract: An ocular function assistance device of an embodiment includes an actuator, a controller, and an information input unit. The ocular function assistance device is used for assisting an ocular function. The actuator receives electricity and operates for providing a predefined ocular function. The controller executes at least control of electricity supply to the actuator. The information input unit inputs biological information or condition information into the controller. The controller changes a control mode of the actuator based on the biological information or the condition information.
    Type: Application
    Filed: February 22, 2016
    Publication date: March 29, 2018
    Applicant: KABUSHIKI KAISHA TOPCON
    Inventors: Toshifumi MIHASHI, Yasufumi FUKUMA, Makoto FUJINO
  • Patent number: 9848772
    Abstract: In an embodiment, cross sectional image storage stores a cross sectional image group including multiple cross sectional images each of which is associated with time. Phase image storage stores a phase image group including multiple phase images each of which is associated with time. Blood flow information storage stores a blood flow information group including multiple blood flow information each of which is related to blood flow in a blood vessel of the living body and is associated with time. Display synchronously displays a cross sectional image included in the cross sectional image group and a phase image included in the phase image group using time associated with the cross sectional image and the phase image, and displays a blood flow image that expresses multiple blood flow information. The display performs the same change as the change to the cross sectional image, the phase image and the blood flow image.
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: December 26, 2017
    Assignees: KABUSHIKI KAISHA TOPCON, National University Corporation ASAHIKAWA MEDICAL UNIVERSITY
    Inventors: Akitoshi Yoshida, Masahiro Akiba, Yasufumi Fukuma, Hideaki Tokoro, Taiki Aimi, Shunsuke Nakamura
  • Patent number: 9789312
    Abstract: A retinal prosthesis system according to an embodiment includes a converter, a retinal prosthesis, and a transmitter. The converter is placed in an eye, and transmits part of light incident on the eye therethrough while converting the energy of the other part of the light into electrical energy. The retinal prosthesis is placed in the eye and includes a photoelectric conversion element array configured to operate with the electrical energy received from the converter to detect the light having transmitted through the converter to generate an electrical signal. The transmitter is used to send the electrical signal generated by the retinal prosthesis to the visual cortex of the brain.
    Type: Grant
    Filed: July 29, 2014
    Date of Patent: October 17, 2017
    Assignee: Kabushiki Kaisha Topcon
    Inventors: Yasufumi Fukuma, Hisashi Tsukada
  • Patent number: 9782070
    Abstract: The fundus photographing apparatus of the present invention includes an illumination light source that generates illumination light flux for illuminating a fundus (of a subject eye), a scanning optical system that converts the illumination light flux from the illumination light source unit into spot light to scan the fundus in two-dimensional directions of a horizontal direction and a vertical direction by the spot light, a light receiver that receives reflected light from each portion of the fundus illuminated by the spot light, and a fundus image acquiring unit that acquires a fundus image based on a signal from the light receiver, wherein the scanning optical system is provided with a scanner including a reflection mirror plate that rotates about orthogonal two axes to simultaneously deflect the spot light in the vertical direction and the horizontal direction for scanning.
    Type: Grant
    Filed: April 4, 2014
    Date of Patent: October 10, 2017
    Assignee: Kabushiki Kaisha TOPCON
    Inventors: Atsushi Utsunomiya, Hirotake Maruyama, Tomoyoshi Abe, Yasufumi Fukuma
  • Patent number: 9717408
    Abstract: An ophthalmologic imaging apparatus includes: a first optical system that applies an accommodation stimulus to a subject's eye; a tomographic image forming unit that includes a second optical system that splits light from a light source into signal light and reference light, and detects interference light between the signal light having travelled via the subject's eye and the reference light, and creates a tomographic image of the subject's eye based on a detection result of the interference light; and an analyzer that compares a first tomographic image with a second tomographic image to acquire change information indicating a change in a tissue of the subject's eye due to an accommodation stimulus change. The first and second tomographic images are respectively created by the tomographic image forming unit for the subject's eye, to which first and second accommodation stimuli are respectively applied by the first and second optical systems.
    Type: Grant
    Filed: December 4, 2013
    Date of Patent: August 1, 2017
    Assignee: KABUSHIKI KAISHA TOPCON
    Inventors: Masahiro Akiba, Yasufumi Fukuma, Hiroshi Akiyama, Hisashi Tsukada, Eiichi Yanagi
  • Patent number: 9662013
    Abstract: According to one embodiment, an ophthalmic microscope includes an illumination system, a pair of light-receiving systems, and a first mechanism. The illumination system is configured to irradiate a subject's eye with illumination light. Each of the light-receiving systems includes a first objective lens and a first imaging device, and is configured to guide return light of the illumination light returning from the subject's eye to the first imaging device through the first objective lens. The objective optical axes of the light-receiving systems are not parallel to each other. The first mechanism is configured to move the light-receiving systems relative to each other to change an angle formed by the objective optical axes of the light-receiving systems.
    Type: Grant
    Filed: February 22, 2016
    Date of Patent: May 30, 2017
    Assignee: KABUSHIKI KAISHA TOPCON
    Inventors: Yasufumi Fukuma, Kazuhiro Oomori, Satoshi Yamamoto
  • Patent number: 9526415
    Abstract: An ophthalmologic apparatus of an embodiment includes an examination part, a moving mechanism, an information obtaining part, and a controller. The examination part is configured to include an optical system for optically examining an eye. The moving mechanism is configured to move the optical system. The information obtaining part is configured to obtain information for carrying out position matching of the optical system to the eye. The controller is configured to carry out first control for the moving mechanism based on the information obtained by the information obtaining part to move the optical system, determine whether information optically obtained by the optical system after the first control is appropriate to the examination or not, and when it is determined that this information is not appropriate, carry out second control for the moving mechanism in response to a prescribed trigger to move the optical system.
    Type: Grant
    Filed: May 20, 2014
    Date of Patent: December 27, 2016
    Assignee: KABUSHIKI KAISHA TOPCON
    Inventors: Yasufumi Fukuma, Kanichi Tokuda, Taiki Aimi, Atsushi Kubota, Yusuke Ono
  • Patent number: 9492082
    Abstract: An optical system splits light into signal light and reference light and detects interference light between scattered light of signal light from living body and reference light. A scanner performs first scan in which first cross section that intersects interested blood vessel is repeatedly scanned with signal light. An image forming part forms first cross sectional image expressing chronological variation of morphology of first cross section and phase image expressing chronological variation of phase difference based on detection results of interference light acquired during first scan. A blood vessel region specifying part specifies blood vessel region corresponding to interested blood vessel for first cross sectional image and phase image. A blood flow information generator generates blood flow information related to interested blood vessel based on blood vessel region of first cross sectional image and chronological variation of phase difference within blood vessel region of phase image.
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: November 15, 2016
    Assignees: KABUSHIKI KAISHA TOPCON, National University Corporation ASAHIKAWA MEDICAL UNIVERSITY
    Inventors: Akitoshi Yoshida, Masahiro Akiba, Yasufumi Fukuma, Hideaki Tokoro, Taiki Aimi, Shunsuke Nakamura