Abstract: An ophthalmic apparatus according to an embodiment includes a fixation system, a data acquisition device, analyzing circuitry, and controlling circuitry. The fixation system projects fixation light onto a subject's eye. The data acquisition device acquires data by applying optical coherence tomography scanning to the subject's eye onto which the fixation light is being projected. The analyzing circuitry analyzes the data to specify the position of a predetermined site of the subject's eye. The controlling circuitry controls at least one of the fixation system and the data acquisition device based on the positional relationship between the position of the predetermined site specified by the analyzing circuitry and a scan area by the data acquisition device.
Abstract: [Problem] To obtain high measurement accuracy in aerial photogrammetry while reducing the cost of installing a measurement target. [Solution] According to the present invention, a launching pad for an unmanned aircraft on which a UAV 200 is installed before take off is provided with: a target indication that constitutes a target locating point used for aerial photogrammetry; and position determining units that determine the position of the UAV 200 with respect to the launching pad in a state in which the position of the UAV 200 with respect to the target indication before take off is specified.
Type:
Grant
Filed:
February 14, 2019
Date of Patent:
January 11, 2022
Assignee:
Topcon Corporation
Inventors:
Takeshi Sasaki, Nobuyuki Fukaya, You Sasaki
Abstract: A non-destructive inspection system 1 includes a neutron detecting unit 4 and an arithmetic unit 60. The neutron detecting unit 4 includes a collimator 30 and a neutron detector 20 integrated together. The collimator 30 has a wall defining a through passage P. The wall is made from a material that absorbs neutrons produced via an inspection object. The neutron detector 20 is capable of detecting neutrons that have passed through the collimator 30. The arithmetic unit 60 generates information on a position and composition of the inspection object, based on information on the neutrons detected by the neutron detector 20, positional information indicating the position of the neutron detecting unit 4, and posture information indicating the posture of the neutron detecting unit 4. The positional information and the posture information are detected by a position and posture detecting unit 5.
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.
Abstract: A non-destructive inspection system 1 includes a neutron radiation source 3 capable of emitting neutrons N, and a neutron detector 14 capable of detecting neutrons Nb produced via an inspection object 6a among neutrons N emitted from the neutron radiation source 3. The neutron radiation source 3 includes a linear accelerator 11 capable of emitting charged particles P accelerated; a first magnet section 12 including magnets 12a and 12b facing each other, the magnets 12a and 12b being capable of deflecting the charged particles P in a direction substantially perpendicular to a direction of emission of the charged particles P from the linear accelerator 11; and a target section 13 capable of producing neutrons N by being irradiated with the charged particles P that have passed through the first magnet section 12.
Abstract: An ophthalmologic apparatus includes a data acquisition unit, a movement mechanism, an image acquisition unit, an analyzer, and a controller. The data acquisition unit includes an optical system for optically acquiring data of a fundus of a subject's eye. The movement mechanism is configured to change relative position between the subject's eye and the data acquisition unit. The image acquisition unit is configured to acquire an image of the fundus. The analyzer is configured to specify a relative movement direction and relative movement amount of the data acquisition unit with respect to the subject's eye based on a flare region formed all around a fundus region in the image. The controller is configured to control the movement mechanism based on the relative movement direction and the relative movement amount to change relative position between the subject's eye and the data acquisition unit in an optical axis direction of the optical system.
Abstract: Target point cloud data about a specific road are extracted from perimeter point cloud data acquired by moving a road surface measurement device along a measurement route and scanning the surroundings thereof. A data storage unit stores trajectory point sequence data that represent, as a plurality of trajectory points, the perimeter point cloud data and a trajectory of the movement of the road surface measurement device. A trajectory point sequence setting unit acquires a trajectory point sequence at equal intervals from the trajectory point sequence data. An extraction area setting unit sets, as extraction areas, a column area Ci and a parallelepiped area Hi that are geometric areas disposed at predetermined positions below a trajectory point Xi. An approximate nearest neighbor search processing unit and an extraction processing unit extract, as the target point cloud data, point data that belong to this extraction area of the perimeter point cloud data.
Abstract: The blood flow analysis apparatus includes an acquisition unit and an extractor. The acquisition unit is configured to acquire blood flow information representing time-course changes in a blood flow velocity of a single retinal artery or retinal vein. The extractor is configured to extract one or more parameters corresponding to change in the blood flow velocity from the blood flow information.
Type:
Application
Filed:
May 13, 2021
Publication date:
December 16, 2021
Applicants:
National University Corporation ASAHIKAWA MEDICAL UNIVERSITY, Topcon Corporation
Inventors:
Akitoshi YOSHIDA, Kana MINAMIDE, Masahiro AKIBA, Jun SAKAI
Abstract: There is provided a surveying instrument including a distance measuring unit configured to measure a distance to an object to be measured, a measuring direction image pickup module which includes the object to be measured and is configured to acquire as observation image, an attitude detector is configured to detect a tilt of the surveying instrument main body and a arithmetic control module, and wherein the arithmetic control module is configured to extract each common corresponding point from a first image acquired at a first installing point and a second image acquired at a second installing point, perform the matching based on the corresponding point, and make a measurement of a positional relationship of the object to be measured with respect to the first installing point and the second installing point based on a matching image.
Abstract: A pile head analysis system captures a plurality of images of a construction site including a pile using a camera mounted on an unmanned aerial vehicle (UAV), acquires the images, generates a three-dimensional model of the construction site, detects a pile head from the three-dimensional model, and determines consistency between the detected pile head and preliminarily acquired design information.
Abstract: An ophthalmologic apparatus includes an OCT measurement unit, a corneal shape measurement unit, an eyeball model generator, and a site specifying unit. The OCT measurement unit is configured to acquire data of a subject's eye by deflecting measurement light using an optical scanner to project onto the subject's eye and detecting interference light between returning light of the measurement light from the subject's eye and reference light. The corneal shape measurement unit is configured to obtain curvature radius distribution on a cornea by detecting returning light of a measurement pattern projected onto a cornea of the subject's eye. The eyeball model generator is configured to generate an eyeball model using the curvature radius distribution on the cornea.
Abstract: An ophthalmologic apparatus includes: an ophthalmologic apparatus body having: an objective lens that faces a subject's eye; a first illumination optical system that irradiates a cornea of the subject's eye with illumination light emitted from a first illumination light source along an optical axis overlapping an optical axis center of the objective lens; an interference image capturing camera that takes an image of a corneal reflection light through the objective lens and outputs an imaging signal; and a calculation unit that calculates, based on a corneal reflection image, of a corneal reflection light, input from the interference image capturing camera, a thickness of a tear fluid film at each position on the corneal surface; and a guide rail that supports the ophthalmologic apparatus body.
Abstract: Provided is a measurement device or the like that expands a dynamic range easily and promptly as appropriate even when three-dimensional data or the like on some parts of a measurement target object is not acquirable, so that the data can be acquired. A measurement device includes a light source unit that sequentially emits a plurality of beams of distance measurement light to an identical target object, based on predetermined fixed output information, a light reception unit that receives reflected light, from the target object, based on which the measurement device acquires measurement information, and an output value reducing unit and/or an input value reducing unit, the output value reducing unit reducing an output value of the light source unit, the input value reducing unit reducing an input value of the reflected light to the light reception unit.
Abstract: An ophthalmic apparatus according to an embodiment includes a fixation system, a data acquisition device, analyzing circuitry, and controlling circuitry. The fixation system projects fixation light onto a subject's eye. The data acquisition device acquires data by applying optical coherence tomography scanning to the subject's eye onto which the fixation light is being projected. The analyzing circuitry analyzes the data to specify the position of a predetermined site of the subject's eye. The controlling circuitry controls at least one of the fixation system and the data acquisition device based on the positional relationship between the position of the predetermined site specified by the analyzing circuitry and a scan area by the data acquisition device.
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, wherein an observation optical system, an objective lens, and an OCT optical system are placed in such a way that the optical axis of the OCT optical system does not penetrate through objective lens, and the optical axis of the observation optical system and the optical axis of the OCT optical system are non-coaxial, and wherein the ophthalmologic microscope further comprises a SLO optical system that scans a light ray which is a visible ray, a near infrared ray, or an infrared ray and guides the light to the subject's eye so as to become substantially coaxial with the optical axis of the OCT optical system.
Abstract: An ophthalmic apparatus includes an acquiring unit, an OCT unit, an analyzer, and a calculator. The acquiring unit is configured to acquire a dioptric power in a first region including a fovea of a subject's eye. The OCT unit is configured to acquire OCT data of a fundus of the subject's eye using optical coherence tomography. The analyzer is configured to specify a shape of the fundus by analyzing the OCT data. The calculator is configured to calculate a dioptric power in a peripheral region of the first region of the fundus based on the dioptric power in the first region and the shape of the fundus.
Type:
Application
Filed:
July 14, 2021
Publication date:
November 4, 2021
Applicant:
Topcon Corporation
Inventors:
Masashi NAKAJIMA, Jonathan LIU, Yasufumi FUKUMA
Abstract: A measuring method, wherein point cloud data of a building is acquired by a laser scanner, wherein the laser scanner has an attitude detector for detecting a tilting with respect to a horizontality or a verticality, converts the point cloud data into a horizontal distance and a height or a difference of a height based on the tilting detected by the attitude detector, sets a height line at a predetermined height on a wall surface, averages a horizontal distance information of the point cloud data included in a predetermined width with the height line as a center in a height direction, further develops the horizontal distance information along the height line in a horizontal direction, and measures a horizontal cross section at the predetermined height.