APPAREIL OPTIQUE DE DETECTION DE DEFAUTS.

    公开(公告)号:BE1016519A6

    公开(公告)日:2006-12-05

    申请号:BE200500228

    申请日:2005-05-09

    Applicant: LAMBDA X SA

    Abstract: La présente invention concerne un appareil optique de détection de défauts de forme et/ou d'état de surface et/ou de couleur de pièces à analyser. L'appareil consiste en l'assemblage sur un ou des supports mécaniques (figure1, repère 7) d'une source lumineuse (figure 1 repère n°1), d'une ouverture optique (figure1 repère n°) d'une lentille d'illumination (figure 1 repère n°3), d'une lentille collectrice (figure 1 repère n°4), d'une diaphragme (figure 1 repère 5) et d'un détecteur photosensible (figure 1 repère n°6). La détection d'un défaut est réalisée par la comparaison entre la mesure du spectre et/ou de l'intensité du spectre réfléchie et/ou diffusé par la pièce à analyser et une mesure effectuée précédemment sur une pièce de référence généralement exempte de défaut. L'appareil est capable de la détection de défauts pour des pièces au repos ou en mouvement.

    IMPROVEMENTS IN OR RELATING TO HYPERSPECTRAL IMAGING
    23.
    发明公开
    IMPROVEMENTS IN OR RELATING TO HYPERSPECTRAL IMAGING 有权
    VERBESSERUNGEN AN ODER IM ZUSAMMENHANG MIT HYPERSPEKTRALER BILDGEBUNG

    公开(公告)号:EP2948745A1

    公开(公告)日:2015-12-02

    申请号:EP14701529.1

    申请日:2014-01-24

    Applicant: Lambda-X

    Inventor: BEGHUIN, Didier

    CPC classification number: G01J3/2823 G01J3/0208 G01J3/0224 G01J3/45 G01J3/4537

    Abstract: Described herein is a hyperspectral imaging system (500) in which a polarising beam splitter (510), a Wollaston prism (520), an optical system (530), and a plane mirror (540) are arranged on an optical axis (550) of the imaging system (500). An imaging detector (560) is provided on which radiation is focussed by an imaging lens (570). The Wollaston prism (520) is imaged on itself by the optical system (530) and the plane mirror (540) so that translation of the Wollaston prism (520) in a direction parallel to a virtual split plane of the prism effectively provides an optical path length difference that is the same for all points in the object field.

    Abstract translation: 这里描述的是一种超光谱成像系统,其中偏振分束器,沃拉斯顿棱镜,光学系统和平面镜被布置在成像系统的光轴上。 提供了一种成像检测器,辐射由成像透镜聚焦在该成像检测器上。 Wollaston棱镜通过光学系统和平面镜自身成像,使得Wollaston棱镜在平行于棱镜的虚拟剖面的方向上的平移有效地提供了光路长度差异,其对于 对象字段。

    Fourier transform deflectometry system and method
    24.
    发明授权
    Fourier transform deflectometry system and method 有权
    傅里叶变换折射系统和方法

    公开(公告)号:EP2212681B1

    公开(公告)日:2013-12-25

    申请号:EP08852427.7

    申请日:2008-11-06

    Applicant: Lambda-X

    CPC classification number: G01N21/95623 G01B11/25 G01M11/0264 G01M11/0278

    Abstract: The present invention relates to a Fourier transform deflectometry system 1 and method for the optical inspection of a phase and amplitude object 2 placed in an optical path between a grating 3 and an imaging system 4, at a distance h of said grating 3. The grating 3 forms a contrast-based periodic pattern with spatial frequencies µ 0 , v 0 in, respectively, orthogonal axes x,y in an image plane, and the imaging system 4 comprises an objective 5 and an imaging sensor 6 comprising a plurality of photosensitive elements. According to the method of the invention, a first image of said pattern, distorted by the phase and amplitude object 2, is first captured through the objective 5 by the imaging sensor 6. Then, a Fourier transform of said first image in a spatial frequency domain is calculated, at least one first- or higher-order spectrum of said Fourier transform is selected and shifted in said frequency domain, so as to substantially place it at a central frequency of said Fourier transform, and a reverse Fourier transform of said at least one shifted first- or higher-order spectrum of said Fourier transform is performed so as to obtain a complex function g(x,y)=I(x,y)e iÕp(x,y) , wherein I(x,y) is an intensity and Õ(x,y) a phase linked to optical deflection angles ¸ x , ¸ y in, respectively, the directions of the x and y axes, in the following form: Õ(x,y)=-2Àh(µ 0 tan¸ x +v 0 tan¸ y ).

    Abstract translation: 本发明涉及一种傅里叶变换折射系统1和方法,用于光栅3和成像系统4之间的光路中放置的相位和幅度物体2的光学检查,光栅3的距离为h。光栅 3在图像平面中分别形成具有空间频率μ0,v 0正交轴x,y的基于对比度的周期性图案,并且成像系统4包括物镜5和成像传感器6,成像传感器6包括多个光敏元件 。 根据本发明的方法,首先通过成像传感器6通过物镜5捕获由相位和幅度物体2失真的所述图案的第一图像。然后,以空间频率对所述第一图像进行傅里叶变换 计算所述傅立叶变换的至少一个一阶或更高阶谱,并且在所述频域中移动所述傅立叶变换的至少一个一阶或更高阶谱,以便将其基本上置于所述傅立叶变换的中心频率处,并且所述傅里叶变换的傅立叶逆变换 (x,y)= I(x,y),其中I(x,y)= I )是一个强度和Õ(x,y)a相,它们分别与x和y轴方向上的光学偏转角x,y y相关联,形式如下:Õ(x,y)= - 2 - h (μ0 tan?x + v 0 tan?y)。

    APPAREIL ELECTRO-OPTIQUE DE DETECTION DE DEFAUTS DE COULEURS.

    公开(公告)号:BE1016633A6

    公开(公告)日:2007-03-06

    申请号:BE200500296

    申请日:2005-06-13

    Applicant: LAMBDA X SA

    Abstract: La présente invention concerne un appareil électro-optique de détection de défauts de couleur pour toutes pièces translucides immobile ou en mouvement. L'appareil illustré en figure n°1 consiste en l'assemblage sur un ou des supports mécaniques (figure 1, repère 7), d'une source lumineuse (figure 1, repère 1), d'une protection optique (figure 1, repère 2), d'un support mécanique de guidage de la pièce à analyser (figure 1, repère 3), d'une ouverture optique (figure 1, repère 4), d'une optique collectrice (figure 1, repère 5) et d'un spectromètre (figure 1, repère 6). La détection d'un défaut de couleur de la pièce à ananlyser est réalisé par la comparaison entre le spectre qui est transmis par la pièce à évaluer et celui mesuré précédement sur une pièce de référence.

    Fourier transform deflectometry system and method
    27.
    发明公开
    Fourier transform deflectometry system and method 审中-公开
    四变换 - Deflektometries系统和Verfahren

    公开(公告)号:EP2063260A1

    公开(公告)日:2009-05-27

    申请号:EP07121009.0

    申请日:2007-11-19

    Applicant: Lambda-X

    CPC classification number: G01N21/95623 G01B11/25 G01M11/0264 G01M11/0278

    Abstract: The present invention relates to a Fourier transform deflectometry system 1 and method for the optical inspection of a phase and amplitude object 2 placed in an optical path between a grating 3 and an imaging system 4, at a distance h of said grating 3. The grating 3 forms a contrast-based periodic pattern with spatial frequencies µ 0 , v 0 in, respectively, orthogonal axes x,y in an image plane, and the imaging system 4 comprises an objective 5 and an imaging sensor 6 comprising a plurality of photosensitive elements. According to the method of the invention, a first image of said pattern, distorted by the phase and amplitude object 2, is first captured through the objective 5 by the imaging sensor 6. Then, a Fourier transform of said first image in a spatial frequency domain is calculated, at least one first- or higher-order spectrum of said Fourier transform is selected and shifted in said frequency domain, so as to substantially place it at a central frequency of said Fourier transform, and a reverse Fourier transform of said at least one shifted first- or higher-order spectrum of said Fourier transform is performed so as to obtain a complex function g(x,y)=I(x,y)e iϕp(x,y) , wherein I(x,y) is an intensity and ϕ(x,y) a phase linked to optical deflection angles θ x , θ y in, respectively, the directions of the x and y axes, in the following form: ϕ(x,y)=-2πh(µ 0 tanθ x +v 0 tanθ y ).

    Abstract translation: 本发明涉及一种傅立叶变换偏转系统1和方法,用于光学检查放置在光栅3与成像系统4之间的光路中的相位和幅度物体2,距离为所述光栅3的距离。光栅 3分别形成具有空间频率μ0,v 0 in,在图像平面中的正交轴x,y的基于对比度的周期性图案,并且成像系统4包括物镜5和成像传感器6,成像传感器6包括多个感光元件 。 根据本发明的方法,通过成像传感器6首先通过物镜5捕获由相位和幅度对象2失真的所述图案的第一图像。然后,以空间频率对所述第一图像进行傅立叶变换 计算所述傅里叶变换的至少一个第一或更高阶频谱,并在所述频域中移位,以便将其基本上置于所述傅里叶变换的中心频率,并且所述at 执行所述傅里叶变换的至少一个移位的一阶或更高阶光谱,以便获得复函数g(x,y)= I(x,y)eiÕp(x,y),其中I(x,y) )是一个强度,Õ(x,y)分别与x和y轴的方向相关联的光偏转角¸x,¸y的相位,如下形式:Õ(x,y)= - 2 - (μ0 tan x + v 0 tan y y)。

    Angular position sensing
    28.
    发明公开
    Angular position sensing 审中-公开
    Winkelstellungserfassung

    公开(公告)号:EP2722650A1

    公开(公告)日:2014-04-23

    申请号:EP12189086.7

    申请日:2012-10-18

    Applicant: Lambda-X

    CPC classification number: G01D5/347 G01D5/34

    Abstract: Described herein is an angular position sensing system (100) and method for determining the angular position of a punctual radiating source (130) with respect to a linear sensor element (110). The linear sensor element (110) having a surface (115) comprising a discrete set of pixels. A periodic grating (120) is provided over the surface (115) of the linear sensor element (110) and the output from each pixel in the discrete set of pixels produces a periodic output signal (140), the phase of which is representative of an angle (α) of radiation from the radiating source (130) with respect to the linear sensor element (110). The periodic output signal (140) is processed in the analogue domain to provide quadrature output signals (190, 195).

    Abstract translation: 这里描述了一种用于确定准时辐射源(130)相对于线性传感器元件(110)的角位置的角度位置感测系统(100)和方法。 线性传感器元件(110)具有包括离散像素组的表面(115)。 在线性传感器元件(110)的表面(115)上提供周期性光栅(120),并且离散像素组中的每个像素的输出产生周期性输出信号(140),其周期代表 来自辐射源(130)的辐射相对于线性传感器元件(110)的角度(±)。 周期性输出信号(140)在模拟域中被处理以提供正交输出信号(190,195)。

    Improvements in or relating to interferometry
    29.
    发明公开
    Improvements in or relating to interferometry 审中-公开
    Verbesserungen an oder im Zusammenhang mit der Interferometrie

    公开(公告)号:EP2535679A1

    公开(公告)日:2012-12-19

    申请号:EP11170072.0

    申请日:2011-06-15

    Applicant: Lambda-X

    Inventor: Beghuin, Didier

    CPC classification number: G02B27/48 G01B9/02082

    Abstract: Described herein is an optical system (100) for reducing the effects of speckle in an interferometer system. The system (100) comprises a laser array (110), intermediate optics (120), a diffuser (130), an integrator (140), and a projection lens system (150) comprising first and second light projection lenses (160, 170) with and an aperture (180) located therebetween. The integrator (140) comprises a uniform output face (190) which can be considered to be a secondary source that is very homogeneous in intensity. The secondary source has been shown to have low speckle contrast whilst retaining high temporal coherence. The low speckle contrast is inversely proportional to the number of laser emitters in the laser array (110) and therefore a vertical cavity surface emitting laser is the preferred laser array as at least 1000 individual emitters can be provided in one device.

    Abstract translation: 这里描述了一种用于减少干涉仪系统中斑点影响的光学系统(100)。 系统(100)包括激光阵列(110),中间光学器件(120),漫射器(130),积分器(140)和投影透镜系统(150),其包括第一和第二光投射透镜 )和位于其间的孔(180)。 积分器(140)包括统一的输出面(190),其可被认为是强度非常均匀的次级源。 二次源已被证明具有低散斑对比度,同时保持高的时间相干性。 低散斑对比度与激光器阵列(110)中的激光发射器的数量成反比,因此垂直空腔表面发射激光器是优选的激光器阵列,因为可以在一个器件中提供至少1000个单独的发射器。

    METHOD, DEVICE, COMPUTER PROGRAM AND SYSTEM FOR CONVERSION OF A MEASUREMENT OF AN OPHTHALMIC LENS

    公开(公告)号:EP4001879A1

    公开(公告)日:2022-05-25

    申请号:EP20207868.9

    申请日:2020-11-16

    Applicant: Lambda-X

    Abstract: Method for conversion of a measurement of an lens (1) comprising the following steps: receiving an experimental lens measurement (EXP) of the lens (1) from a light measurement of the lens (1); determining from the experimental lens measurement (EPX) a digital lens model representing the lens (1) (S1); determining, based on the digital lens model, a converted digital lens measurement (SIM2) representing a converted lens measurement of the lens (1) (S2); determining, based on the experimental lens measurement (EXP1) and the converted digital lens measurement (SIM2), a measurement result (CON) for the lens (1) (S3).

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