Patents Assigned to Kabushiki Kaisha Topcon
  • Patent number: 10980416
    Abstract: A blood flow measurement apparatus of an embodiment includes an image acquisition unit, an image region specification unit, a measurement location setting unit, a scanner, and a blood flow information generation unit. The image acquisition unit acquires an image of a living body. The image region specification unit analyzes the image to specify a plurality of blood vessel regions. The measurement location setting unit sets a plurality of measurement locations that intersects with the plurality of blood vessel regions. The scanner scans a plurality of cross sections of the living body corresponding to the plurality of measurement locations using optical coherence tomography. The blood flow information generation unit generates blood flow information on the living body based on data acquired through the scan.
    Type: Grant
    Filed: November 2, 2015
    Date of Patent: April 20, 2021
    Assignees: National University Corporation ASAHIKAWA MEDICAL UNIVERSITY, KABUSHIKI KAISHA TOPCON
    Inventors: Akitoshi Yoshida, Masahiro Akiba
  • Patent number: 10932665
    Abstract: An illumination system of an ophthalmologic microscope system projects illumination light onto a patient's eye. A light receiving system guides returning light of the illumination light to an image sensor. A display controller controls a display device to display an image obtained by the image sensor. A magnification changing unit changes display magnification of the image. An interference optical system detects interference light generated from returning light of measurement light from the eye and reference light. An optical scanner is used to scan the eye with the measurement light. An OCT data generation unit processes a detection result of the interference light to generate data. A condition setting unit sets a projection condition of the measurement light in accordance with change in the display magnification. An OCT controller controls the interference optical system and/or the optical scanner based on the projection condition.
    Type: Grant
    Filed: February 3, 2016
    Date of Patent: March 2, 2021
    Assignee: KABUSHIKI KAISHA TOPCON
    Inventors: Ikuo Ishinabe, Michiko Nakanishi, Satoshi Yamamoto
  • Patent number: 10905323
    Abstract: A scanner of a blood flow measurement apparatus of an embodiment alternately performs first scan and second scan for first and second cross sections both intersecting an interested blood vessel. An image forming unit forms one or more images of the first cross section including a phase image of the first cross section and an image of the second cross section. A blood vessel region specification unit specifies a first blood vessel region in any of the one or more images of the first cross section and a second blood vessel region in the image of the second cross section. A gradient calculation unit calculates a gradient of the interested blood vessel at the first cross section based on the first and second blood vessel regions. A blood flow information generation unit generates blood flow information based on the phase image and the gradient.
    Type: Grant
    Filed: November 2, 2015
    Date of Patent: February 2, 2021
    Assignee: KABUSHIKI KAISHA TOPCON
    Inventor: Masahiro Akiba
  • Patent number: 10820803
    Abstract: A patient management system of an embodiment includes a server, a plurality of ophthalmic examination apparatuses assigned to a plurality of patients, and a plurality of computers installed in a plurality of medical institutions. The ophthalmic examination apparatuses and computers are communicable with the server via a communication line. The server manages the account of each patient, and the account of each medical institution. Test data obtained by each of the ophthalmic examination apparatuses is stored in the account of a corresponding patient. The server sends information stored in the account of a patient to a computer installed in one of the medical institutions assigned in advance to the patient.
    Type: Grant
    Filed: July 25, 2014
    Date of Patent: November 3, 2020
    Assignee: KABUSHIKI KAISHA TOPCON
    Inventors: Yasufumi Fukuma, Makoto Fujino, Hisashi Tsukada, Takashi Kubota
  • Patent number: 10788310
    Abstract: An optical coherence tomography (OCT) system electrically mixes a signature signal with an OCT signal (e.g., an interferogram) output by a photodetector of the OCT system. The signature signal may be a signal output by a photodetector that detects an optical signal from a fiber Bragg grating. The signature signal may then be time delayed before combination with the OCT signal. A series of interferograms are then aligned according to the signature signal. A rescaling signal may be similarly electrically mixed with the signature and OCT signals.
    Type: Grant
    Filed: February 23, 2017
    Date of Patent: September 29, 2020
    Assignee: Kabushiki Kaisha TOPCON
    Inventors: Zhenguo Wang, Jongsik Kim, Jonathan Liu, Kinpui Chan
  • Patent number: 10758123
    Abstract: An ophthalmological microscope system, having an illumination system that projects illumination light onto a subject's eye. A light receiving system guides returning light of the illumination light to an image sensor or an eyepiece system. An interference optical system splits light into measurement light and reference light and detects interference light generated from returning light of the measurement light and the reference light. A designation unit is used for designating an operation mode. When an observation priority mode (or an OCT priority mode) has been designated, a controller executes first light amount control that restricts light amount of the measurement light (or second light amount control that restricts light amount of the illumination light) to make total light amount of the illumination light and the measurement light equal to or less than a predetermined value.
    Type: Grant
    Filed: February 3, 2016
    Date of Patent: September 1, 2020
    Assignee: KABUSHIKI KAISHA TOPCON
    Inventors: Satoshi Yamamoto, Ikuo Ishinabe, Michiko Nakanishi
  • Patent number: 10719933
    Abstract: Methods and systems for angiographic imaging with optical coherence tomography (OCT) are described using ratio-based and angiographic deviation based calculations. In using these calculations to determine motion, arbitrary interframe permutations may be used, post-calculated, non-linear results for projection visualization may be averaged, poor matches may be eliminated on an A-line by A-line basis, windowing functions may be used to improve results, partial spectrums may be used when capturing data, and a minimum intensity threshold may be used for determining which pixels to use.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: July 21, 2020
    Assignee: Kabushiki Kaisha TOPCON
    Inventors: Charles A. Reisman, Zhenguo Wang, Atsushi Kubota, Jonathan Liu
  • Patent number: 10705225
    Abstract: A preparation system for surveying operation of the present invention includes a mobile station disposed at a known observation point and a fixed station disposed at an unknown reference point. The preparation system includes an arithmetic step to determine the position coordinate of the unknown reference point based on positioning data received by the mobile station, positioning data received by the fixed station, and a position coordinate of the known observation point, and an assigning step to assign the unknown reference point whose position coordinate is determined as the known reference point.
    Type: Grant
    Filed: June 12, 2014
    Date of Patent: July 7, 2020
    Assignee: Kabushiki Kaisha TOPCON
    Inventors: Fumihiko Kamizono, Takashi Ogawa
  • Patent number: 10690497
    Abstract: A technique for more smoothly moving a reflective prism to a target position is provided. A surveying instrument 100 includes a leg part 101, a base 102 supported by the leg part 101, a movable part 112 held by the base 102 and being movable straight in any direction within a two-dimensional plane relative to the base 102, a reflective prism 113 mounted on the movable part 112, and a laser pointer 114 that is mounted to the movable part 112 and that emits a guiding light in a vertical direction.
    Type: Grant
    Filed: December 29, 2015
    Date of Patent: June 23, 2020
    Assignee: KABUSHIKI KAISHA TOPCON
    Inventors: Terukazu Nagashima, Shin-ichi Hayase, Atsushi Shoji
  • Patent number: 10670493
    Abstract: The invention provides a safety diagnosis system for structure, which comprises one GNSS receiver installed on an upper floor of a structure, a control device having a storage unit for storing a program which prepares an absolute displacement curve of the structure based on an absolute coordinate measured by the GNSS receiver and a displacement of the absolute coordinate, calculates a maximum inter-layer displacement and a maximum inter-layer deformation angle per each floor based on the absolute displacement curve and prepares an inter-layer deformation angle curve and a judging unit for performing a diagnosis of the safety of the structure based on the maximum inter-layer displacement and the maximum inter-layer deformation angle, and a display unit, wherein the control device calculates the maximum inter-layer displacement and the maximum inter-layer deformation angle per each floor and the inter-layer deformation angle curve based on a displacement of the absolute coordinate and the program and makes the
    Type: Grant
    Filed: September 22, 2015
    Date of Patent: June 2, 2020
    Assignee: Kabushiki Kaisha TOPCON
    Inventors: Tadayuki Morishita, Yoshihito Saito, Hiroaki Ryujin, Koichiro Fuse, Kazuhiro Ogawa, Kaoru Kumagai, Ritsuo Sakimura
  • Patent number: 10627212
    Abstract: A reference signal having a known induced optical delay is used for phase stabilization of optical coherence tomography (OCT) interferograms, and for correcting sampling differences within OCT interferograms, in single mode and multimodal OCT systems. The reference signal can then be used to the measure time shift or sample clock period shifts induced in the interferogram signal by the OCT system. A corresponding OCT interferogram signal can then be corrected to remove the shift induced by the system based on the determination.
    Type: Grant
    Filed: April 18, 2017
    Date of Patent: April 21, 2020
    Assignee: KABUSHIKI KAISHA TOPCON
    Inventors: Jonathan J. Liu, Zhenguo Wang, Jongsik Kim, Kinpui Chan
  • Patent number: 10602129
    Abstract: An image acquiring device comprises a first camera 14 for acquiring video images, consisting of frame images continuous in time series, a second camera 15 being in a known relation with the first camera and used for acquiring two or more optical spectral images of an object to be measured, and an image pickup control device 21, and in the image acquiring device, the image pickup control device is configured to extract two or more feature points from one of the frame images, to sequentially specify the feature points in the frame images continuous in time series, to perform image matching between the frame images regarding the frame images corresponding to the two or more optical spectral images based on the feature points, and to synthesize the two or more optical spectral images according to the condition obtained by the image matching.
    Type: Grant
    Filed: April 8, 2016
    Date of Patent: March 24, 2020
    Assignee: Kabushiki Kaisha TOPCON
    Inventors: Fumio Ohtomo, Hitoshi Otani, Masayuki Momiuchi, Kazuki Osaragi
  • Patent number: 10548472
    Abstract: An ophthalmic examination support system of an embodiment includes a server and clients. The server includes a medical information storage apparatus that stores medical information on each patient, and a management apparatus that manages the medical information. Each of the clients can communicate with the management apparatus. The system includes an association information storage unit and an examination condition obtaining unit. The association information storage unit stores, in advance, association information in which association between predetermined medical information items and examination conditions of an ophthalmic examination is recorded. The examination condition obtaining unit receives medical information retrieved from the medical information storage apparatus by the management apparatus based on patient information transmitted from one of the clients, and obtains an examination condition corresponding to at least part of the received medical information from the association information.
    Type: Grant
    Filed: February 3, 2016
    Date of Patent: February 4, 2020
    Assignee: KABUSHIKI KAISHA TOPCON
    Inventor: Hisashi Tsukada
  • Publication number: 20200029809
    Abstract: A controller included in a blood flow measurement apparatus controls a scanner to iteratively scan one or more cross sections of an interested blood vessel. An image forming unit forms a phase image that represents chronological change in phase difference in the one or more cross sections based on data acquired through iterative scan. An image processor outputs a predetermined signal based on the chronological change in phase difference represented by the phase image. Upon receiving the predetermined signal, the controller controls the scanner to start scan for acquiring blood flow information on the interested blood vessel.
    Type: Application
    Filed: October 3, 2019
    Publication date: January 30, 2020
    Applicant: KABUSHIKI KAISHA TOPCON
    Inventor: Masahiro AKIBA
  • Patent number: 10531984
    Abstract: An illumination system for projecting illumination light onto an eye. A left (right) light receiving system includes a left (right) objective lens and left (right) image sensor, and guides returning light of the illumination light to the left (right) image sensor via the left (right) objective lens. The objective optical axes of the left and right light receiving systems are disposed nonparallelly to each other. A projection system includes a projection system objective lens, and projects light onto the eye via the projection system objective lens. An optical scanner is used for scanning the eye with the light from the projection system. A deflection member is disposed near the objective optical axes, disposed in the optical path of the projection system between the optical scanner and the projection system objective lens, and deflects the optical path.
    Type: Grant
    Filed: February 3, 2016
    Date of Patent: January 14, 2020
    Assignee: KABUSHIKI KAISHA TOPCON
    Inventors: Ikuo Ishinabe, Michiko Nakanishi, Satoshi Yamamoto
  • Patent number: 10509983
    Abstract: A technique for efficiently calibrating a camera is provided. Reference laser scan data is obtained by scanning a building 131 by a laser scanner 115, which is fixed on a vehicle 100 and has known exterior orientation parameters, while the vehicle 100 travels. An image of the building 131 is photographed at a predetermined timing by an onboard camera 113. Reference point cloud position data, in which the reference laser scan data is described in a coordinate system defined on the vehicle 100 at the predetermined timing, is calculated based on the trajectory the vehicle 100 has traveled. Matching points are selected between feature points in the reference point cloud position data and in the image. Exterior orientation parameters of the camera 113 are calculated based on relative relationships between the reference point cloud position data and image coordinate values in the image of the matching points.
    Type: Grant
    Filed: September 2, 2015
    Date of Patent: December 17, 2019
    Assignee: KABUSHIKI KAISHA TOPCON
    Inventors: You Sasaki, Tadayuki Ito
  • Patent number: 10497124
    Abstract: Provided is a method of processing image data and detecting a region of an image represented by the image data to be excluded from an analysis of the image. According to the method, image data captured by a medical modality is received. An evaluation of a portion of the image data representing a two-dimensional view of a subject appearing in the image is conducted to locate, in the two-dimensional view, the region to be excluded from the analysis of the image. A feature pertinent to the analysis appearing in a remaining portion of the image, that is outside of the region to be excluded from the analysis located by the evaluation, is detected.
    Type: Grant
    Filed: March 12, 2014
    Date of Patent: December 3, 2019
    Assignee: Kabushiki Kaisha TOPCON
    Inventors: Qi Yang, Charles A. Reisman
  • Patent number: 10485703
    Abstract: Operations of a laser treatment apparatus are facilitated. A laser treatment apparatus of an embodiment includes an illumination system, observation system, irradiation system, illumination-area changing part, irradiation-condition setting part and controller. The illumination system illuminates an eye fundus. The observation system is used for observing the fundus illuminated. The irradiation system irradiates aiming light of a preset pattern and treatment light consisting of laser light of a pattern determined based on the preset pattern onto the fundus. The illumination-area changing part is used for changing an illumination area of the fundus by the illumination system. The irradiation-condition setting part sets irradiation condition of the aiming light and/or treatment light from the irradiation system. The controller controls the illumination-area changing part based on the set irradiation condition to change the illumination area.
    Type: Grant
    Filed: August 9, 2013
    Date of Patent: November 26, 2019
    Assignee: KABUSHIKI KAISHA TOPCON
    Inventors: Kazuhisa Nomura, Hideharu Suzuki
  • Patent number: 10478058
    Abstract: An optical coherence tomography (OCT) image composed of a plurality of A-scans of a structure is analyzed by defining, for each A-scan, a set of neighboring A-scans surrounding the A-slices scan. Following an optional de-noising step, the neighboring A-scans are aligned in the imaging direction, then a matrix X is formed from the aligned A-scans, and matrix completion is performed to obtain a reduced speckle noise image.
    Type: Grant
    Filed: November 19, 2015
    Date of Patent: November 19, 2019
    Assignees: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH, KABUSHIKI KAISHA TOPCON
    Inventors: Jun Cheng, Jiang Liu, Wing Kee Damon Wong, Masahiro Akiba
  • Patent number: 10473453
    Abstract: A position at which evaluation of a defect was performed is easily identified. Relative positional relationships between three-dimensional coordinates of feature points of a photographed object and positions of a panoramic camera 111 are calculated based on a moving image, which is photographed by the panoramic camera 111 while a vehicle 100 travels. The position of the object photographed by a hyperspectral camera 114 is calculated based on the relative positional relationships and exterior orientation parameters of the hyperspectral camera 114 with respect to the panoramic camera 111.
    Type: Grant
    Filed: September 21, 2015
    Date of Patent: November 12, 2019
    Assignee: KABUSHIKI KAISHA TOPCON
    Inventors: Kaoru Kumagai, Kunihiro Hayashi, Naoto Kasori