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).

  • Publication number: 20200300363
    Abstract: There is provided a seal member for a bearing comprising a molded rubber article and a core metal, wherein the molded rubber article is produced by vulcanization-molding a rubber composition comprising 100 parts by mass of a rubber (A) containing an acrylic acid ester as a main component, 1 to 30 parts by mass of a carbon material (B), and 10 to 100 parts by mass of a carbon black (C) having a DBP oil absorption of 20 mL/100 g or more and less than 150 mL/100 g; the carbon material (B) is a carbon nanotube (B1) or a carbon black (B2) having a DBP oil absorption of 150 mL/100 g or more and 1000 mL/100 g or less; and a volume resistivity of the molded rubber article is 1×106 ?·cm or less.
    Type: Application
    Filed: March 9, 2020
    Publication date: September 24, 2020
    Applicant: UCHIYAMA MANUFACTURING CORP.
    Inventors: Keiko IKEDA, Yoshihiko YAMAGUCHI, Tomohisa YAMAMOTO, Tatsuo KATAYAMA
  • 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
  • Publication number: 20200107722
    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: Application
    Filed: December 9, 2019
    Publication date: April 9, 2020
    Applicant: TOPCON CORPORATION
    Inventors: Ryoichi HIROSE, Ikuo ISHINABE, Tatsuo YAMAGUCHI
  • Publication number: 20200093364
    Abstract: An ophthalmic imaging apparatus of an exemplary aspect includes a data acquisition device, image constructing circuitry, and composing circuitry. The data acquisition device is configured to sequentially apply optical coherence tomography (OCT) scans to a plurality of regions different from each other of a fundus of a subject's eye in order and under a condition according to a fundus shape, to acquire a plurality of pieces of data corresponding to the plurality of regions. The image constructing circuitry is configured to construct an image from each of the plurality of pieces of data. The composing circuitry is configured to construct a composite image of a plurality of images constructed from the plurality of pieces of data by the image constructing circuitry.
    Type: Application
    Filed: August 19, 2019
    Publication date: March 26, 2020
    Applicant: TOPCON CORPORATION
    Inventors: Ryoichi HIROSE, Toshihiro MINO, Tatsuo YAMAGUCHI
  • Publication number: 20200092464
    Abstract: According to one embodiment, an electronic device includes one or more processors. The one or more processors obtain an image captured by a camera with a filter having a first area transmitting light of a first wavelength range and a second area transmitting light of a second wavelength range. The image includes a first color-component image based on the light of the first wavelength range and a second color-component image based on the light of the second wavelength range. The one or more processors notify a user of an effective area for calculation of depth information based on a bias of color information in the first color-component image and the second color-component image.
    Type: Application
    Filed: March 5, 2019
    Publication date: March 19, 2020
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Tatsuo KOZAKAYA, Nao MISHIMA, Akihisa MORIYA, Jun YAMAGUCHI, Tomoya TSURUYAMA, Takayuki SASAKI
  • Publication number: 20200092482
    Abstract: According to one embodiment, an optical filter associated with a lens unit having a first end includes a filter part, a filter frame, and an attachment part. The filter part includes a first filter area that transmits light rays of a first wavelength band and a second filter area that transmits light rays of a second wavelength band. The first wavelength band and the second wavelength band include a common wavelength band. The filter frame holds the filter part. The attachment part is coupled with the filter frame and is detachably attached to the first end of the lens unit. When the attachment part is attached to the first end of the lens unit, a distance between the filter part and an aperture within the lens unit is longer than a distance between the first end and the aperture.
    Type: Application
    Filed: February 25, 2019
    Publication date: March 19, 2020
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Tomoya Tsuruyama, Akihisa Moriya, Nao Mishima, Takayuki Sasaki, Jun Yamaguchi, Tatsuo Kozakaya
  • Publication number: 20200051261
    Abstract: According to one embodiment, an image processing device includes a hardware processor implemented by one or more processors, The hardware processor is configured to acquire an image captured by a monocular camera. The hardware processor is configured to estimate a distance to an object based on the acquired image. The hardware processor is configured to calculate the distance to the object by considering an atmosphere failure influencing the acquired image and executing a statistical process on the estimated distance.
    Type: Application
    Filed: March 11, 2019
    Publication date: February 13, 2020
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Tomoya Tsuruyama, Nao MISHIMA, Tatsuo KOZAKAYA, Akihisa MORIYA, Jun YAMAGUCHI, Takayuki SASAKI
  • Publication number: 20200015675
    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: Application
    Filed: September 26, 2019
    Publication date: January 16, 2020
    Applicant: TOPCON CORPORATION
    Inventors: Masahiro SHIBUTANI, Tatsuo YAMAGUCHI, Toshihiro MINO, Ryoichi HIROSE
  • Publication number: 20200013535
    Abstract: Provided is a transformer oil that has high environmental compatibility and is expected to be further improved in transformer cooling properties. The transformer oil is a transformer oil prepared by mixing a plant oil and a silicone oil and containing no mineral oil, in which a volume ratio of the plant oil to the silicone oil is 3:7 to 7:3 and magnetic particles (for example, temperature-sensitive magnetic particles) are dispersed.
    Type: Application
    Filed: March 9, 2018
    Publication date: January 9, 2020
    Applicants: THE DOSHISHA, Sakura Seiyusho Co. Ltd.
    Inventors: Hiroshi YAMAGUCHI, Haruhiko YAMASAKI, Tatsuo KAWAGUCHI
  • Patent number: 10419230
    Abstract: According to one embodiment, an electronic apparatus includes a transceiver and a hardware processor. The transceiver receives first handwriting shared in a first group according to a first scheme. The first group includes a first electronic apparatus and a second electronic apparatus. The first handwriting includes handwriting made on the first electronic apparatus and handwriting made on the second electronic apparatus. The hardware processor reads first data to be shared in the first group, makes a third group including the electronic apparatus and the first electronic apparatus, and shares the first data in the third group according to a third scheme by transmitting the first data to the first electronic apparatus from the transceiver.
    Type: Grant
    Filed: February 10, 2016
    Date of Patent: September 17, 2019
    Assignee: TOSHIBA CLIENT SOLUTIONS CO., LTD.
    Inventors: Tatsuo Yamaguchi, Toshiyuki Yamagami
  • Publication number: 20190099076
    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: Application
    Filed: February 20, 2017
    Publication date: April 4, 2019
    Applicants: OSAKA UNIVERSITY, TOPCON CORPORATION
    Inventors: Takashi FUJIKADO, Masakazu HIROTA, Kohji NISHIDA, Makoto SAIKA, Tatsuo YAMAGUCHI, Suguru MIYAGAWA
  • Patent number: 10182721
    Abstract: According to one embodiment, a fundus imaging apparatus includes a light source, an optical scanner, an optical fiber, a light guide system, a photodetector unit, and an image forming unit. The optical scanner scans the fundus of a subject's eye with light from the light source. The optical fiber includes a plurality of optical waveguides. The light guide system guides the light returning from the fundus to the entrance end of the optical fiber. The photodetector unit detects light output from each of at least three regions at the exit end of the optical fiber. The image forming unit forms a first image based on a detection result of light output from a first region of the at least three regions, and a second image based on detection results of light output from two or more regions of the at least three regions other than the first region.
    Type: Grant
    Filed: July 6, 2016
    Date of Patent: January 22, 2019
    Assignee: TOPCON CORPORATION
    Inventors: Akemi Miwa, Tatsuo Yamaguchi, Makoto Saika
  • Publication number: 20190000316
    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.
    Type: Application
    Filed: July 29, 2016
    Publication date: January 3, 2019
    Applicant: TOPCON CORPORATION
    Inventors: Ryoichi HIROSE, Ikuo ISHINABE, Tatsuo YAMAGUCHI