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公开(公告)号：US12007265B2
公开(公告)日：2024-06-11
申请号：US17676553
申请日：2022-02-21
IPC分类号： G01F22/02 , B41J2/21 , G01B11/06 , G01B11/08 , G01B11/255 , G01F22/00 , G01F25/00 , G01N13/02 , G01N21/85 , G01N35/10 , G06T7/62
CPC分类号： G01F22/02 , G01B11/08 , G01B11/255 , G01N21/8507 , G06T7/62 , B41J2/2142 , G01B11/0608 , G01F22/00 , G01F25/0084 , G01N2013/0208 , G01N35/1016
摘要： A method and test apparatus determines a volume of a droplet of liquid. The test apparatus deposits a drop of liquid to be measured on a surface that provides a known contact angle with the liquid under the deposition conditions used, thereby establishing one of: (i) an advancing, (ii) a receding, and (iii) an intermediate contact angle. The test apparatus images the drop. The test apparatus measures a dimension of height or diameter of the drop. In one embodiment, the test apparatus calculates a volume of the drop of liquid from the relationship of the contact angle to one or more parameters selected from the maximum height, the diameter of the contact patch, the radius of curvature, or the cross sectional area of the drop.
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公开(公告)号：US11433930B2
公开(公告)日：2022-09-06
申请号：US16477991
申请日：2018-01-05
发明人： Martin Buerger
IPC分类号： B61K9/08 , E01B35/00 , B61L15/00 , B61L23/04 , G01B11/255
摘要： The invention relates to a method for contactless recording of a track geometry of a track by means of a rail vehicle which is moved along the track on on-track undercarriages (4), wherein profile data of the track extending in transverse direction are compiled by means of a laser scanner. In this, it is provided that, by means of an evaluation device, profile data are evaluated relative to a reference base pre-defined on the rail vehicle in order to derive from this the course of a track central axis and/or a rail. The invention additionally relates to a rail vehicle which comprise an evaluation device configured for carrying out the method. Thus, no further measuring system is required to determine a track position.
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公开(公告)号：US11248904B2
公开(公告)日：2022-02-15
申请号：US16499588
申请日：2018-03-26
IPC分类号： G01B11/24 , G01B11/255 , G06T7/521
摘要： Systems and methods for measuring a curvature radius of a sample. The methods comprise: emitting a light beam from a laser source in a direction towards a beam expander; expanding a size of the light beam emitted from the laser source to create a broad laser beam; reflecting the broad laser beam off of a curved surface of the sample; creating a plurality of non-parallel laser beams by passing the reflected broad laser beam through a grating mask or a biprism; using the plurality of non-parallel laser beams to create an interference pattern at a camera image sensor; capturing a first image by the camera image sensor; and processing the first image by an image processing device to determine the curvature radius of the sample.
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公开(公告)号：US11156450B2
公开(公告)日：2021-10-26
申请号：US16941972
申请日：2020-07-29
发明人： Mingfeng Lu , Jinmin Wu , Kun Xiong , Xianggen Xia , Feng Zhang , Ran Tao
IPC分类号： G01B9/02 , G01B11/255
摘要： A method, device and electronic apparatus for estimating physical parameters are disclosed. The method includes: reading a Newton's rings fringe pattern obtained by performing an interferometric measurement on a unit to be measured; obtaining the number and length of first-direction signals of the Newton's rings fringe pattern; performing, for each of the first-direction signals, a discrete chirp Fourier transform (DCFT) on the first-direction signal based on each first chirp rate parameter within a range of the length of first-direction signals, to obtain a first magnitude spectrum of an intensity distribution signal in a DCFT domain; determining a first chirp rate parameter and a first frequency parameter corresponding to a first magnitude peak value based on the first magnitude spectrum; and estimating the physical parameters involved in the interferometric measurement at least according to the first chirp rate parameter and first frequency parameter corresponding to the first magnitude peak value. In this way, the physical parameters involved in the interferometric measurement can be estimated with high accuracy and stably.
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公开(公告)号：US11154190B2
公开(公告)日：2021-10-26
申请号：US16071248
申请日：2017-01-20
申请人： Eaglet Eye B.V.
IPC分类号： A61B3/107 , A61B3/14 , G01B11/255 , G01B11/25
摘要： The invention concerns a system for determining the topography of a diffusely reflecting curved surface, that comprises two telecentric projection branches that project fringe images of a Ronchi grating on the diffusely reflecting curved surface, and a viewing branch of which the optical system projects an image of the illuminated surface on its camera target, and comprises further a computer that receives the fringe images recorded by the camera target and calculates from these the topography of the anterior eye surfaces, in which system the projection sources are semiconductor diodes and the optical system of the viewing branch is two-sided telecentric.
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公开(公告)号：US11131544B2
公开(公告)日：2021-09-28
申请号：US16087290
申请日：2017-03-23
发明人： Romain Guyard , Yann Lecieux , Cyril Lupi , Dominique Leduc
IPC分类号： G01B11/255 , G01B11/16
摘要： An optical fiber curvature sensor. Two networks (R1, R2) with periodic longitudinal modulation of the refractive index of the optical fiber core are inscribed in the fiber (F) one behind the other or one on top of the other. The networks are configured to respectively reflect wavelengths λ1 and λ2 such that λ1=λB+ΔλB1 and λ2=λB+ΔλB2, where λB is the Bragg wavelength of the networks and where λB1 and λB2 are shifts sensitive to the temperature, to deformations and to the curvature of the optical fiber. The two networks are defined so that the quantities ΔλB1 and ΔλB2 have substantially identical sensitivity to temperature and to deformations and substantially opposite sensitivity to curvature.
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公开(公告)号：US11047675B2
公开(公告)日：2021-06-29
申请号：US16423115
申请日：2019-05-27
申请人： Valerie Peidous , Vassili Peidous , Nina Peydus
发明人： Valerie Peidous , Vassili Peidous , Nina Peydus
IPC分类号： G01B11/24 , G01N21/95 , G01B11/30 , G01B7/34 , G01B7/004 , G01B7/28 , G01B7/293 , G01B11/255
摘要： Disclosed are a method and an apparatus for inspection of workpieces and products having curved and, in particular, spherical surfaces. The method is based on scanning inspected objects with a narrow probing beam of electromagnetic radiation and concurrently measuring the radiation scattered on the surface. The method and apparatus improve the detectability of features and imperfections on inspected surfaces by providing invariable parameters and conditions of scanning, robust mechanical stability of scanning systems, high positioning accuracy of the probing electromagnetic beam and efficient collection of the scattered radiation. The apparatus allows surface defect classification, determining defect dimensions and convenient automation of inspection.
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公开(公告)号：US10731973B2
公开(公告)日：2020-08-04
申请号：US16319322
申请日：2014-08-19
发明人： Jianpeng Liu , Tang Zhang , Chengmin Li
IPC分类号： G01B11/245 , G01N21/956 , G01B11/255 , H01L21/66 , G01N21/95 , H01L33/00 , H01L33/20
摘要： A device for detecting a two-dimensional morphology of a wafer substrate in real time. The device comprises: a first calculation module, a second calculation module and an analysis module, wherein the first calculation module calculates the curvature CX between any two points of incidence on the wafer substrate in an X direction of a substrate to be detected according to position signals of N light spots; the second calculation module calculates the curvature CY at any one point of incidence on the wafer substrate in a moving direction, i.e. a Y direction, of the substrate to be detected according to the position signals of N light spots. The device can be adapted to a sapphire substrate on a graphite disc which rotates at a high speed.
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公开(公告)号：US20200240771A1
公开(公告)日：2020-07-30
申请号：US16087290
申请日：2017-03-23
发明人： Romain GUYARD , Yann LECIEUX , Cyril LUPI , Dominique LEDUC
IPC分类号： G01B11/255 , G01B11/16
摘要： An optical fiber curvature sensor. Two networks (R1, R2) with periodic longitudinal modulation of the refractive index of the optical fiber core are inscribed in the fiber (F) one behind the other or one on top of the other. The networks are configured to respectively reflect wavelengths λ1 and λ2 such that λ1=λB+ΔλB1 and λ2=λB+ΔλB2, where λB is the Bragg wavelength of the networks and where λB1 and λB2 are shifts sensitive to the temperature, to deformations and to the curvature of the optical fiber. The two networks are defined so that the quantities ΔλB1 and ΔλB2 have substantially identical sensitivity to temperature and to deformations and substantially opposite sensitivity to curvature.
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公开(公告)号：US20200080880A1
公开(公告)日：2020-03-12
申请号：US16611213
申请日：2018-05-04
IPC分类号： G01F22/02 , G01B11/08 , G01B11/255 , G06T7/62
摘要： A method and test apparatus determines a volume of a droplet of liquid. The test apparatus deposits a drop of liquid to be measured on a surface that provides a known contact angle with the liquid under the deposition conditions used, thereby establishing one of: (i) an advancing, (ii) a receding, and (iii) an intermediate contact angle. The test apparatus images the drop. The test apparatus measures a dimension of height or diameter of the drop. In one embodiment, the test apparatus calculates a volume of the drop of liquid from the relationship of the contact angle to one or more parameters selected from the maximum height, the diameter of the contact patch, the radius of curvature, or the cross sectional area of the drop.
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