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公开(公告)号：US12167892B2
公开(公告)日：2024-12-17
申请号：US18404926
申请日：2024-01-05
Applicant: TOPCON CORPORATION
Inventor： Ryoichi Hirose , Tatsuo Yamaguchi
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.
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公开(公告)号：US12096983B2
公开(公告)日：2024-09-24
申请号：US17198299
申请日：2021-03-11
Applicant: Topcon Corporation
Inventor： Tatsuo Yamaguchi , Ryoichi Hirose
CPC classification number: A61B3/102 , A61B3/0025 , A61B3/14 , A61B3/18
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.
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公开(公告)号：US11986239B2
公开(公告)日：2024-05-21
申请号：US17008678
申请日：2020-09-01
Applicant: TOPCON CORPORATION
Inventor： Ryoichi Hirose , Manabu Sakaihara , Tatsuo Yamaguchi
CPC classification number: A61B3/102 , A61B3/0008 , A61B3/103 , A61B3/12
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.
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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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Patent Agency Ranking
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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公开(公告)号：US12220171B2
公开(公告)日：2025-02-11
申请号：US17665586
申请日：2022-02-06
Applicant: Topcon Corporation
Inventor： Yoko Tatara , Suguru Miyagawa , Tatsuo Yamaguchi , Makoto Saika
Abstract: The ophthalmologic device to be coupled to a correcting device for correcting subject eyes, the correcting device including a right-left pair of two examination windows and a right-left pair of arrangement mechanisms that each arrange first optical elements, includes: a coupling member configured to be detachably coupled to each of coupled members provided on a side surface of the correcting device on a side opposite to an eyepiece side for each subject eye; a second optical element arranged at a position facing a second examination window opposite to a first examination window which is an eyepiece window, when the coupling member is coupled to the coupled member, the second optical element configured to branch a second optical path from a first optical path along the optical axes; and an objective measuring system arranged on the second optical path and configured to acquire ocular characteristics of each subject eye.
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公开(公告)号：US11980416B2
公开(公告)日：2024-05-14
申请号：US17083312
申请日：2020-10-29
Applicant: TOPCON CORPORATION
Inventor： Ryoichi Hirose , Tatsuo Yamaguchi
CPC classification number: A61B3/0025 , A61B3/1005 , A61B3/102
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.
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公开(公告)号：US11540711B2
公开(公告)日：2023-01-03
申请号：US16731229
申请日：2019-12-31
Applicant: TOPCON CORPORATION
Inventor： Ryoichi Hirose , Tatsuo Yamaguchi
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 light from the subject's eye and the reference light; an optical path coupling member disposed between the first optical scanner and the first concave mirror, and combining an optical path of the SLO optical system and an optical path of the OCT optical system; and a correction unit configured to correct detection result of the interference light detected by the OCT optical system or an image formed based on the detection result.
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公开(公告)号：US11490805B2
公开(公告)日：2022-11-08
申请号：US16777927
申请日：2020-01-31
Applicant: TOPCON CORPORATION
Inventor： Ryoichi Hirose , Tatsuo Yamaguchi
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.
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