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公开(公告)号：US11717150B2
公开(公告)日：2023-08-08
申请号：US16885305
申请日：2020-05-28
Applicant: TOPCON CORPORATION
Inventor： Tatsuo Yamaguchi , Ryoichi Hirose , Michiko Nakanishi
CPC classification number: A61B3/0025 , A61B3/102 , A61B3/1005 , A61B3/1225
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. The intraocular distance calculator is configured to obtain an intraocular distance between predetermined sites of the subject's eye based on the detection result of the interference light. The image correcting unit is configured to correct the tomographic image based on the intraocular distance. The controller is configured to control at least the optical scanner.
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公开(公告)号：US11490802B2
公开(公告)日：2022-11-08
申请号：US16716508
申请日：2019-12-17
Applicant: TOPCON CORPORATION
Inventor： Ryoichi Hirose , Tatsuo Yamaguchi
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.
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公开(公告)号：US11213202B2
公开(公告)日：2022-01-04
申请号：US16583319
申请日：2019-09-26
Applicant: TOPCON CORPORATION
Inventor： Masahiro Shibutani , Tatsuo Yamaguchi , Toshihiro Mino , Ryoichi Hirose
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. The controller is configured to control the second optical scanner based on the displacement.
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Patent Agency Ranking
公开(公告)号：US12266099B2
公开(公告)日：2025-04-01
申请号：US17580643
申请日：2022-01-21
Applicant: Topcon Corporation
Inventor： Ryoichi Hirose , Tatsuo Yamaguchi
Abstract: An ophthalmological information processing apparatus includes an acquisition unit and an image correcting unit. The acquisition unit is configured to acquire a front image depicting a predetermined site of a subject's eye in multiple gradations and an OCT image of the subject's eye. The image correcting unit is configured to correct a pixel value in a region including a first position of the predetermined site in the OCT image based on a pixel value at a second position corresponding to the first position in the front image.
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公开(公告)号：US12133684B2
公开(公告)日：2024-11-05
申请号：US17211932
申请日：2021-03-25
Applicant: Topcon Corporation
Inventor： Ryoichi Hirose , Toshihiro Mino , Tatsuo Yamaguchi
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.
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公开(公告)号：US11941800B2
公开(公告)日：2024-03-26
申请号：US17099828
申请日：2020-11-17
Applicant: TOPCON CORPORATION
Inventor： Ryoichi Hirose , Tatsuo Yamaguchi , Suguru Miyagawa
CPC classification number: G06T7/0012 , A61B3/0025 , A61B3/0041 , A61B3/102 , A61B3/1225 , G06T3/20 , G06T2207/10101 , G06T2207/30041
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.
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公开(公告)号：US11298019B2
公开(公告)日：2022-04-12
申请号：US16718223
申请日：2019-12-18
Applicant: TOPCON CORPORATION
Inventor： Ryoichi Hirose , Tatsuo Yamaguchi
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.
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公开(公告)号：US10932664B2
公开(公告)日：2021-03-02
申请号：US16061724
申请日：2016-07-29
Applicant: TOPCON CORPORATION
Inventor： Ryoichi Hirose , Ikuo Ishinabe , Tatsuo Yamaguchi
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.
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