-
公开(公告)号：US20210196116A1
公开(公告)日：2021-07-01
申请号：US17198299
申请日：2021-03-11
Applicant: Topcon Corporation
Inventor： Tatsuo YAMAGUCHI , Ryoichi HIROSE
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.
-
公开(公告)号：US20200205653A1
公开(公告)日：2020-07-02
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.
-
公开(公告)号：US20180084991A1
公开(公告)日：2018-03-29
申请号：US15670234
申请日：2017-08-07
Applicant: TOPCON CORPORATION
Inventor： Masahiro SHIBUTANI , Ryoichi HIROSE , Toshihiro MINO
CPC classification number: A61B3/102 , A61B3/0025 , A61B3/0033 , A61B3/152
Abstract: An optical coherence tomography (OCT) apparatus according to an embodiment is configured to split light from a light source into measurement light and reference light, project the measurement light on an object, and detect interference light generated from the reference light and the measurement light returning from the object. The OCT apparatus includes a dispersion unit and an information generation unit. The dispersion unit is configured to relatively change a dispersion characteristic of a measurement optical path which is an optical path of the measurement light and a dispersion characteristic of a reference optical path which is an optical path of the reference light, according to an operation mode corresponding to a depth range. The information generation unit is configured to generate information on the object according to the operation mode, based on a detection result of the interference light.
-
Patent Agency Ranking
公开(公告)号：US20240350003A1
公开(公告)日：2024-10-24
申请号：US18761532
申请日：2024-07-02
Applicant: Topcon Corporation
Inventor： Ryoichi HIROSE , Toshihiro MINO , Tatsuo YAMAGUCHI
Abstract: The ophthalmic imaging apparatus of an embodiment example performs motion contrast imaging by applying OCT scanning to an eye. The data acquiring unit 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 constructs a motion contrast image from the plurality of pieces of time-course data acquired. The controller 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.
-
公开(公告)号：US20220409040A1
公开(公告)日：2022-12-29
申请号：US17901877
申请日：2022-09-02
Applicant: TOPCON CORPORATION
Inventor： Tatsuo YAMAGUCHI , Ryoichi HIROSE , Michiko NAKANISHI
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.
-
公开(公告)号：US20210204809A1
公开(公告)日：2021-07-08
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.
-
公开(公告)号：US20210038068A1
公开(公告)日：2021-02-11
申请号：US17083312
申请日：2020-10-29
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.
-
公开(公告)号：US20200015675A1
公开(公告)日：2020-01-16
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.
-
-
-
-
-
-
-
Search Results
18
records
(took 0.019 seconds)
