Patents Assigned to Kabushiki Kaisha Topcon
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Patent number: 11678796Abstract: 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: GrantFiled: October 3, 2019Date of Patent: June 20, 2023Assignee: KABUSHIKI KAISHA TOPCONInventor: Masahiro Akiba
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Patent number: 11481897Abstract: 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: GrantFiled: July 16, 2020Date of Patent: October 25, 2022Assignee: Kabushiki Kaisha TOPCONInventors: Charles A. Reisman, Zhenguo Wang, Atsushi Kubota, Jonathan Liu
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Publication number: 20210407666Abstract: A telemedicine data transfer system receives telemedicine data from a data source and decides whether to transmit the telemedicine data to a remote end circuit or prevent transmission of the telemedicine data to the remote end circuit based on a result of an evaluation. A telemedicine data transfer system includes image compression and decompression circuits. The decompression circuit may produce decompressed and enhanced telemedicine data. The image compression and decompression circuits include neural networks trained using an objective function to evaluate a difference between a training input data provided to the image compression circuit and a training output data that is output from the image decompression circuit. The training output data is made different from the training input data by a data enhancement operation performed on the training output data prior to the evaluation.Type: ApplicationFiled: June 25, 2021Publication date: December 30, 2021Applicant: Kabushiki Kaisha TopconInventors: Dawei LI, Song MEI, Zhenguo WANG, Kinpui CHAN
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Publication number: 20210366612Abstract: A method used for supporting ophthalmic examinations includes the step of preparing association information between medical information items and ophthalmic examination conditions. Patient information of a patient is transmitted from a client to a server configured to store and manage medical information. The server retrieves medical information of the patient based on the transmitted patient information, acquires a condition corresponding to the retrieved medical information from the association information, and transmits the acquired condition to the client. The client acquires examination data from the patient's eye based on the transmitted condition, and transmits the examination data together with the patient's patient information to the server. The server stores the transmitted examination data and/or an analysis result thereof.Type: ApplicationFiled: August 6, 2021Publication date: November 25, 2021Applicant: KABUSHIKI KAISHA TOPCONInventor: Hisashi TSUKADA
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Patent number: 10980416Abstract: 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: GrantFiled: November 2, 2015Date of Patent: April 20, 2021Assignees: National University Corporation ASAHIKAWA MEDICAL UNIVERSITY, KABUSHIKI KAISHA TOPCONInventors: Akitoshi Yoshida, Masahiro Akiba
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Patent number: 10932665Abstract: 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: GrantFiled: February 3, 2016Date of Patent: March 2, 2021Assignee: KABUSHIKI KAISHA TOPCONInventors: Ikuo Ishinabe, Michiko Nakanishi, Satoshi Yamamoto
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Patent number: 10905323Abstract: 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: GrantFiled: November 2, 2015Date of Patent: February 2, 2021Assignee: KABUSHIKI KAISHA TOPCONInventor: Masahiro Akiba
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Patent number: 10820803Abstract: 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: GrantFiled: July 25, 2014Date of Patent: November 3, 2020Assignee: KABUSHIKI KAISHA TOPCONInventors: Yasufumi Fukuma, Makoto Fujino, Hisashi Tsukada, Takashi Kubota
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Patent number: 10788310Abstract: 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: GrantFiled: February 23, 2017Date of Patent: September 29, 2020Assignee: Kabushiki Kaisha TOPCONInventors: Zhenguo Wang, Jongsik Kim, Jonathan Liu, Kinpui Chan
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Patent number: 10758123Abstract: 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: GrantFiled: February 3, 2016Date of Patent: September 1, 2020Assignee: KABUSHIKI KAISHA TOPCONInventors: Satoshi Yamamoto, Ikuo Ishinabe, Michiko Nakanishi
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Patent number: 10719933Abstract: 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: GrantFiled: April 27, 2018Date of Patent: July 21, 2020Assignee: Kabushiki Kaisha TOPCONInventors: Charles A. Reisman, Zhenguo Wang, Atsushi Kubota, Jonathan Liu
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Patent number: 10705225Abstract: 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: GrantFiled: June 12, 2014Date of Patent: July 7, 2020Assignee: Kabushiki Kaisha TOPCONInventors: Fumihiko Kamizono, Takashi Ogawa
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Patent number: 10690497Abstract: 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: GrantFiled: December 29, 2015Date of Patent: June 23, 2020Assignee: KABUSHIKI KAISHA TOPCONInventors: Terukazu Nagashima, Shin-ichi Hayase, Atsushi Shoji
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Patent number: 10670493Abstract: 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 theType: GrantFiled: September 22, 2015Date of Patent: June 2, 2020Assignee: Kabushiki Kaisha TOPCONInventors: Tadayuki Morishita, Yoshihito Saito, Hiroaki Ryujin, Koichiro Fuse, Kazuhiro Ogawa, Kaoru Kumagai, Ritsuo Sakimura
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Patent number: 10627212Abstract: 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: GrantFiled: April 18, 2017Date of Patent: April 21, 2020Assignee: KABUSHIKI KAISHA TOPCONInventors: Jonathan J. Liu, Zhenguo Wang, Jongsik Kim, Kinpui Chan
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Patent number: 10602129Abstract: 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: GrantFiled: April 8, 2016Date of Patent: March 24, 2020Assignee: Kabushiki Kaisha TOPCONInventors: Fumio Ohtomo, Hitoshi Otani, Masayuki Momiuchi, Kazuki Osaragi
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Patent number: 10548472Abstract: 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: GrantFiled: February 3, 2016Date of Patent: February 4, 2020Assignee: KABUSHIKI KAISHA TOPCONInventor: Hisashi Tsukada
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Publication number: 20200029809Abstract: 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: ApplicationFiled: October 3, 2019Publication date: January 30, 2020Applicant: KABUSHIKI KAISHA TOPCONInventor: Masahiro AKIBA
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Patent number: 10531984Abstract: 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: GrantFiled: February 3, 2016Date of Patent: January 14, 2020Assignee: KABUSHIKI KAISHA TOPCONInventors: Ikuo Ishinabe, Michiko Nakanishi, Satoshi Yamamoto
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Patent number: 10509983Abstract: 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: GrantFiled: September 2, 2015Date of Patent: December 17, 2019Assignee: KABUSHIKI KAISHA TOPCONInventors: You Sasaki, Tadayuki Ito