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公开(公告)号：US20200279352A1
公开(公告)日：2020-09-03
申请号：US16797848
申请日：2020-02-21
Applicant: Topcon Corporation
Inventor： Zaixing Mao , Zhenguo Wang , Kinpui Chan
Abstract: Ophthalmological mages generated by coherent imaging modalities have multiple types of noise, including random noise caused by the imaging system and speckle noise caused by turbid objects such as living tissues. These noises can occur at different levels in different locations. A noise-reduction method and system of the present disclosure thus relates to applying different filters for different types of noise and/or different locations of images, sequentially or in parallel and combined, to produce a final noise-reduced image.
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公开(公告)号：US20200271758A1
公开(公告)日：2020-08-27
申请号：US16799967
申请日：2020-02-25
Applicant: TOPCON Corporation
Inventor： Kaoru Kumagai , Minoru Chiba , Akinobu Sugiura
Abstract: Provided is a target instrument including a pole, a prism provided on the pole, and a terminal device provided on the pole, wherein the terminal device comprises an image pickup module, a tilt sensor which detects tilts in two axial directions, and an arithmetic control module, wherein the image pickup module acquires an image which includes a reference object, the tilt sensor detects a tilt angle of a target instrument, and the arithmetic control module calculates a tilt direction of the target instrument from a position of the reference object in the image, calculates a tilt direction of the target instrument based on tilt angles in the two axial directions of the tilt sensor, acquires a deviation between the two tilt directions, and corrects the tilt angles in the two axial directions of the tilt sensor to tilt angles in directions parallel to an optical axis of the image pickup module and orthogonal to the optical axis based on the deviation.
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公开(公告)号：US10748257B2
公开(公告)日：2020-08-18
申请号：US16023765
申请日：2018-06-29
Applicant: TOPCON CORPORATION
Inventor： Naoki Morikawa
Abstract: Systems and methods are described for colorizing a point cloud comprising a set of point cloud data points associated with a particular object using a plurality of candidate images. For each respective data point in the set of point cloud data points, an image is selected, from a subset of the plurality of candidate images that include an un-occluded point of the particular object corresponding to the respective data point, that has a shortest subject distance to the un-occluded point of the particular object. The respective data point is colorized based on a color in the selected image of the un-occluded point of the particular object corresponding to the respective data point.
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134.发明申请公开(公告)号：US20200245862A1
公开(公告)日：2020-08-06
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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公开(公告)号：US10724860B2
公开(公告)日：2020-07-28
申请号：US15890635
申请日：2018-02-07
Applicant: Topcon Corporation
Inventor： Nobuyuki Nishita , Jumpei Kochi , Satoshi Yanobe
Abstract: When a camera and a surveying device are connected by a synchro cable, and a photographing condition obtaining unit obtains a photographing start time of the camera, a survey control unit makes a survey time measurement unit start time measurement. After the camera and the surveying device are disconnected, the survey control unit starts a survey by a predetermined surveying period ΔT when tracking of the prism starts. Based on the time measurement by the survey time measurement unit, the survey control unit associates the survey result with the photographing position of each image taken by the camera to generate the data for photogrammetry.
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Patent Agency Ranking
136.发明申请公开(公告)号：US20200221947A1
公开(公告)日：2020-07-16
申请号：US16408483
申请日：2019-05-10
Applicant: TOPCON CORPORATION
Inventor： Toshihiro MINO , Jonathan LIU
Abstract: An ophthalmologic information processing apparatus includes an acquisition unit, a tissue specifying unit, and a specifying unit. The acquisition unit is configured to acquire a tomographic image of a subject's eye. The tissue specifying unit is configured to acquire first shape data representing shape of a tissue of the subject's eye by performing segmentation processing on each of a plurality of tomographic images acquired by the acquisition unit. The specifying unit is configured to obtain second shape data representing shape of the tissue based on the plurality of first shape data acquired by the tissue specifying unit.
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公开(公告)号：US10712430B2
公开(公告)日：2020-07-14
申请号：US15647391
申请日：2017-07-12
Applicant: TOPCON Corporation
Inventor： Taichi Yuasa
Abstract: An optical system of a laser scanner comprising: a light projecting system for projecting a distance measuring light, a scanning mirror for rotatably irradiating the distance measuring light from the light projecting system around a single axis and for making a reflected distance measuring light from an object to be measured enter a light receiving system, a transmission window for accommodating the scanning mirror and through which the distance measuring light and the reflected distance measuring light are transmitted, and a correction optical component for offsetting an optical action of the transmission window, which is provided at least in a middle of an irradiating optical path of the distance measuring light.
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公开(公告)号：US10712153B2
公开(公告)日：2020-07-14
申请号：US15477691
申请日：2017-04-03
Applicant: TOPCON CORPORATION
Inventor： Kaoru Kumagai , Satoshi Yanobe , Tetsutaro Kouji
Abstract: Provided is a method for controlling an ultrasonic motor to reduce deterioration of automatic tracking performance, and a surveying instrument for the same. The present invention provides a method for controlling an ultrasonic motor in a surveying instrument including a rotary shaft, an ultrasonic motor that drives a rotary shaft, a tracking unit that includes a light emitting unit and a light receiving unit and tracks a target, and a clock signal oscillation unit that outputs a clock signal, wherein at the time of low-speed rotation of the ultrasonic motor, based on the clock signal, a ratio of an acceleration period in which a drive signal is applied and a deceleration period in which the drive signal is stopped in a drive cycle of the drive signal of the ultrasonic motor is set, and the light emitting unit is made to emit light in the deceleration period.
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公开(公告)号：US20200214557A1
公开(公告)日：2020-07-09
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：US20200214555A1
公开(公告)日：2020-07-09
申请号：US16610259
申请日：2018-05-02
Applicant: Topcon Corporation
Inventor： Yasufumi FUKUMA , Kazuhiro OOMORI
Abstract: The object of the present invention is to develop an ophthalmologic microscope of a new method that increases the degree of freedom in the optical design in the Galilean ophthalmologic microscope provided with an OCT optical system. The present invention provides an ophthalmologic microscope 1 comprising; an illuminating optical system 300, an observation optical system 400; an objective lens 2; and an OCT optical system 500, characterized in that the optical axis 0-500 of the OCT optical system does not penetrate through the objective lens 2, it comprises objective lens for OCT 507 through which the optical axis 0-500 of the OCT optical system penetrates, and deflection optical elements 503a, 503b for scanning of the OCT optical system and the objective lens for OCT 507 are in a substantially optically conjugate positional relation.
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