Patents by Inventor Tatsuo Yamaguchi

Tatsuo Yamaguchi 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
  • Publication number: 20210204809
    Abstract: The ophthalmic imaging apparatus (1) of an embodiment example performs motion contrast imaging by applying OCT scanning to an eye (E). The data acquiring unit (2, 100) acquires a plurality of pieces of time-course data respectively corresponding to a plurality of scan points, by conducting repetitive A-scan application to individual scan points. The image constructing unit (220) constructs a motion contrast image from the plurality of pieces of time-course data acquired. The controller (211) controls the data acquiring unit such that data acquisition time intervals of first time-course data corresponding to a first scan point of the plurality of scan points and data acquisition time intervals of second time-course data corresponding to a second scan point become substantially equal to each other.
    Type: Application
    Filed: March 25, 2021
    Publication date: July 8, 2021
    Applicant: Topcon Corporation
    Inventors: Ryoichi HIROSE, Toshihiro MINO, Tatsuo YAMAGUCHI
  • Publication number: 20210196116
    Abstract: In an ophthalmic imaging apparatus of some aspect examples, a data acquiring unit acquires data by applying an OCT scan to an eye. An image constructing unit constructs an image from the data acquired. A focal position changing unit is provided to the measurement arm. A scan controller controls the data acquiring unit according to a scan pattern including first and second partial patterns that are continuous patterns for central and peripheral regions of an OCT scan application area, respectively. A focus controller controls the focal position changing unit such that a first focal position is applied in parallel with an OCT scan of at least part of the first partial pattern and a second focal position is applied in parallel with an OCT scan to at least part of the second partial pattern.
    Type: Application
    Filed: March 11, 2021
    Publication date: July 1, 2021
    Applicant: Topcon Corporation
    Inventors: Tatsuo YAMAGUCHI, Ryoichi HIROSE
  • Patent number: 11008409
    Abstract: Provided is a method for producing a butene polymer, comprising: a polymerization step of performing polymerization reaction by contacting a raw material component comprising 20% by mass or more of isobutene with a Lewis acid catalyst; and a distillation step of subjecting a solution to be treated containing a reaction product of the polymerization reaction and a butene oligomer added to the reaction product to distillation treatment to obtain the butene polymer, wherein an amount of the butene oligomer added is 25 parts by mass or larger with respect to 100 parts by mass of the reaction product.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: May 18, 2021
    Assignee: ENEOS Corporation
    Inventors: Tatsuo Yamaguchi, Koichi Sato, Tatsuya Chiba, Teruhisa Kuroki
  • Patent number: 10959615
    Abstract: An eye-fatigue examining device and an eye-fatigue examining method capable of examining eye fatigue of a subject's eye regardless of an age of a patient are provided. The eye-fatigue examining device includes: a light quantity difference adjusting unit that increases a light quantity difference between lights respectively incident on right and left subject's eyes; a gaze direction detecting unit that detects gaze directions of the respective subject's eyes while the light quantity difference adjusting unit increases the light quantity difference; and a light quantity difference deciding unit that decides a specific light quantity difference at which a change in the gaze directions due to the increase in the light quantity difference occurs, based on the detection result of the gaze direction detecting unit.
    Type: Grant
    Filed: February 20, 2017
    Date of Patent: March 30, 2021
    Assignees: TOPCON CORPORATION, OSAKA UNIVERSITY
    Inventors: Takashi Fujikado, Masakazu Hirota, Kohji Nishida, Makoto Saika, Tatsuo Yamaguchi, Suguru Miyagawa
  • Publication number: 20210073988
    Abstract: An ophthalmologic information processing apparatus analyzes an image of a subject's eye formed by arranging a plurality of A-scan images acquired by performing OCT scan on inside the subject's eye with measurement light deflected around a scan center position. The ophthalmologic information processing apparatus includes a correcting unit, a region specifying unit, and a direction specifying unit. The correcting unit is configured to transform a pixel position in the image into a transformation position along a traveling direction of the measurement light passing through the scan center position. The region specifying unit is configured to specify a predetermined layer region by analyzing the image in which the pixel position has been transformed by the correcting unit. The direction specifying unit is configured to specify a normal direction of the layer region specified by the region specifying unit.
    Type: Application
    Filed: November 17, 2020
    Publication date: March 11, 2021
    Applicant: TOPCON CORPORATION
    Inventors: Ryoichi HIROSE, Tatsuo YAMAGUCHI, Suguru MIYAGAWA
  • Publication number: 20210068651
    Abstract: In a scanning imaging apparatus of some aspect examples, a scanner applies an optical scan to a sample to acquire data. A scan controller controls the scanner to sequentially apply, to the sample, pattern scans according to a two-dimensional pattern including cycles. A movement unit relatively moves a scan area corresponding to the two-dimensional pattern and the sample. A movement controller controls the movement unit such that cycles in first and second scans of the pattern scans cross each other. An image constructing unit constructs an image based on data acquired under controls performed by the scan controller and the movement controller. The scan controller and the movement controller perform controls of the scanner and the movement unit respectively such that first and second cycles in a pattern scan cross each other at least at one point.
    Type: Application
    Filed: September 7, 2020
    Publication date: March 11, 2021
    Applicants: TOPCON CORPORATION
    Inventors: Yoshiaki YASUNO, Shuichi MAKITA, Tatsuo YAMAGUCHI, Toshihiro MINO
  • Patent number: 10932664
    Abstract: An ophthalmic device that comprises a first objective lens system, an optical system, an anterior eye segment photographing system, and a first optical-path combining member. The first objective lens system includes two or more lenses. The optical system includes a projection system configured to project light onto a target eye via the first objective lens system. The anterior eye segment photographing system is used for photographing an anterior eye segment of the target eye. The first optical-path combining member is located between the two or more lenses to combine an optical path of the optical system and an optical path of the anterior eye segment photographing system.
    Type: Grant
    Filed: July 29, 2016
    Date of Patent: March 2, 2021
    Assignee: TOPCON CORPORATION
    Inventors: Ryoichi Hirose, Ikuo Ishinabe, Tatsuo Yamaguchi
  • Publication number: 20210038071
    Abstract: An ophthalmic apparatus of an aspect example applies optical coherence tomography (OCT) to an eye, and includes an interferometer, an OCT data generating unit, an optical path length changing unit, and a processing unit. The interferometer includes a measurement arm and a reference arm. The OCT data generating unit is configured to generate OCT data based on an output from the interferometer. The optical path length changing unit is configured to change at least one of the optical path length of the measurement arm and the optical path length of the reference arm. The processing unit is configured to control the optical path length changing unit to place partial data of the OCT data corresponding to a predetermined part of the eye at a standard depth level. The standard depth level is set based on a predetermined ocular parameter value.
    Type: Application
    Filed: July 22, 2020
    Publication date: February 11, 2021
    Applicant: TOPCON CORPORATION
    Inventors: Yoko TATARA, Tatsuo YAMAGUCHI, Makoto SAIKA
  • Publication number: 20210038068
    Abstract: An ophthalmologic information processing apparatus corrects an image of a subject's eye formed by arranging a plurality of A-scan images acquired by scanning inside the subject's eye with measurement light deflected around a scan center position. The ophthalmologic information processing apparatus includes a specifying unit and a transforming unit. The specifying unit is configured to specify a transformation position along a traveling direction of the measurement light passing through the scan center position, the transformation position corresponding to a pixel position in the image. The transforming unit is configured to transform the pixel position into the transformation position.
    Type: Application
    Filed: October 29, 2020
    Publication date: February 11, 2021
    Applicant: TOPCON CORPORATION
    Inventors: Ryoichi HIROSE, Tatsuo YAMAGUCHI
  • Publication number: 20200397282
    Abstract: An ophthalmologic apparatus includes an fixation projection system, an interference optical system, and a controller. The fixation projection system is configured to project fixation light flux onto a fundus of a subject's eye. The interference optical system includes an optical scanner and is configured to split light from light source into measurement light and reference light, to irradiate the subject' eye with the measurement light deflected by the optical scanner, and to detect interference light between returning light of the measurement light from the subject's eye and the reference light. The controller is configured to perform OCT measurement on a first scan region and a second scan region, which are different from each other in the subject's eye, by controlling the interference optical system in a state where a projected position of the fixation light flux on the fundus is fixed.
    Type: Application
    Filed: September 1, 2020
    Publication date: December 24, 2020
    Applicant: TOPCON CORPORATION
    Inventors: Ryoichi HIROSE, Manabu SAKAIHARA, Tatsuo YAMAGUCHI
  • Patent number: 10793697
    Abstract: A thermoplastic elastomer composition having at least one elastomer component selected from the group consisting of elastomeric polymers (A) each of which has a side chain (a) containing a hydrogen-bond cross-linkable moiety having a carbonyl-containing group and/or a nitrogen-containing heterocycle and has a glass-transition point of 25° C. or below, and elastomeric polymers (B) each of which contains a hydrogen-bond cross-linkable moiety and a covalent-bond cross-linking moiety in a side chain and has a glass-transition point of 25° C. or below; and a clay, wherein an amount of the clay contained is 20 parts by mass or less relative to 100 parts by mass of the elastomer component.
    Type: Grant
    Filed: March 4, 2016
    Date of Patent: October 6, 2020
    Assignee: ENEOS CORPORATION
    Inventors: Keisuke Chino, Hiroaki Suzuki, Tatsuo Yamaguchi, Ryuichi Ueno, Tsuyoshi Yamaguchi
  • Publication number: 20200288966
    Abstract: An ophthalmologic apparatus includes an optical scanner, an interference optical system, an intraocular distance calculator, an image correcting unit, and a controller. The optical scanner is disposed at an optically substantially conjugate position with a first site of a subject's eye. The interference optical system is configured to split light from a light source into reference light and measurement light, to project the measurement light onto the subject's eye via the optical scanner, and to detect interference light between returning light of the light from the subject's eye and the reference light via the optical scanner. The image forming unit is configured to form a tomographic image of the subject's eye corresponding a first traveling direction of the measurement light deflected by the optical scanner, based on a detection result of the interference light.
    Type: Application
    Filed: May 28, 2020
    Publication date: September 17, 2020
    Applicant: TOPCON CORPORATION
    Inventors: Tatsuo YAMAGUCHI, Ryoichi HIROSE, Michiko NAKANISHI
  • Publication number: 20200270377
    Abstract: Provided is a method for producing a butene polymer, comprising: a polymerization step of performing polymerization reaction by contacting a raw material component comprising 20% by mass or more of isobutene with a Lewis acid catalyst; and a distillation step of subjecting a solution to be treated containing a reaction product of the polymerization reaction and a butene oligomer added to the reaction product to distillation treatment to obtain the butene polymer, wherein an amount of the butene oligomer added is 25 parts by mass or larger with respect to 100 parts by mass of the reaction product.
    Type: Application
    Filed: December 15, 2016
    Publication date: August 27, 2020
    Applicant: JXTG NIPPON OIL & ENERGY CORPORATION
    Inventors: Tatsuo YAMAGUCHI, Koichi SATO, Tatsuya CHIBA, Teruhisa KUROKI
  • Publication number: 20200245862
    Abstract: A new technique is provided to easily grasp the form of the fundus and the like of the eye to be examined being depicted in a tomographic image. An ophthalmic information processing device includes an image rotation circuit and a display control circuit. The image rotation circuit rotates a tomographic image of the eye to be examined acquired by using optical coherence tomography while making a measurement optical axis be eccentric relative to a predetermined site of the eye to be examined, in accordance with an eccentric amount and an eccentric direction of the measurement optical axis relative to the predetermined site. The display control circuit causes a display device to display the tomographic image rotated by the image rotation circuit.
    Type: Application
    Filed: January 31, 2020
    Publication date: August 6, 2020
    Applicant: TOPCON CORPORATION
    Inventors: Ryoichi HIROSE, Tatsuo YAMAGUCHI
  • Publication number: 20200214557
    Abstract: An ophthalmologic apparatus, includes: a first concave mirror and a second concave mirror having a concave surface-shaped first reflective surface and a concave surface-shaped second reflective surface; an SLO optical system configured to project light from an SLO light source onto a subject's eye via the first concave mirror and the second concave mirror, and to detect returning light from the subject's eye; a first optical scanner configured to deflect the light from the SLO light source to guide the light to the first reflective surface; a second optical scanner configured to deflect light reflected by the first reflective surface to guide the light to the second reflective surface; an OCT optical system including a third optical scanner, and configured to split light from an OCT light source into measurement light and reference light, to project the measurement light deflected by the third optical scanner onto the subject's eye, and to detect interference light between returning light of the measurement l
    Type: Application
    Filed: December 31, 2019
    Publication date: July 9, 2020
    Applicant: TOPCON CORPORATION
    Inventors: Ryoichi HIROSE, Tatsuo YAMAGUCHI
  • Publication number: 20200205653
    Abstract: An ophthalmologic apparatus includes a data acquisition unit, a storage unit, and a correction unit. The data acquisition unit includes a concave mirror and an optical scanner configured to deflect light from a light source to guide to a reflective surface of the concave mirror. The data acquisition unit is configured to acquire a first data set group in an A-scan direction by performing optical coherence tomography on a subject's eye placed at a subject's eye position or a conjugate position of the subject's eye position using light reflected by the reflective surface. The storage unit is configured to store correction data for correcting an incident angle of the light at the subject's eye position depending on a deflection angle of the light by the optical scanner. The correction unit is configured to generate a second data set group by correcting at least a part of the first data set group based on the correction data stored in the storage unit.
    Type: Application
    Filed: December 17, 2019
    Publication date: July 2, 2020
    Applicant: TOPCON CORPORATION
    Inventors: Ryoichi HIROSE, Tatsuo YAMAGUCHI
  • Publication number: 20200205659
    Abstract: An ophthalmologic apparatus includes an acquisition unit and a controller. The acquisition unit includes an optical scanner capable of deflecting light in a predetermined deflection angle range. The acquisition unit is configured to acquire data of a subject's eye by performing A-scan on the subject's eye using optical coherence tomography by measurement light deflected by the optical scanner. The controller is configured to cause the acquisition unit to perform A-scan based on a deflection operation state of the optical scanner.
    Type: Application
    Filed: December 18, 2019
    Publication date: July 2, 2020
    Applicant: TOPCON CORPORATION
    Inventors: Ryoichi HIROSE, Tatsuo YAMAGUCHI
  • Publication number: 20200138283
    Abstract: An ophthalmologic apparatus includes: an optical system configured to acquire data of a subject's eye; a housing unit configured to house the optical system; and an attachment member including a holding member configured to hold a face of the subject movably in a state where a peripheral site of the subject's eye is in contact with the holding member, a passing part through which an optical axis of the optical system passes being formed in the holding member, and the attachment member configured to be detachable between the housing unit and the subject's eye.
    Type: Application
    Filed: January 2, 2020
    Publication date: May 7, 2020
    Applicant: TOPCON CORPORATION
    Inventors: Tatsuo YAMAGUCHI, Michiko NAKANISHI, Taichi YUASA
  • Publication number: 20200121501
    Abstract: A laser treatment apparatus includes an irradiation system, a wavefront changing unit, and a controller. The irradiation system is configured to output laser light for treatment from a light source. The wavefront changing unit is configured to change a wave front of the laser light for treatment output by the irradiation system to guide the laser light for treatment whose wave front is changed to a patient's eye. The controller is configured to control the wavefront changing unit.
    Type: Application
    Filed: December 22, 2019
    Publication date: April 23, 2020
    Applicant: TOPCON CORPORATION
    Inventors: Tatsuo YAMAGUCHI, Kazuhiro OMORI