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    • 2. 发明公开
    • DISPOSITIF D'ANALYSE D'UN MÉLANGE POLYPHASIQUE VIA UN FAISCEAU DE LUMIÈRE RÉTRODIFFUSÉE PAR CELUI-CI
    • 设备技术的混合物的多相混合物的后向散射BY梁分析
    • EP2356429A1
    • 2011-08-17
    • EP09797092.5
    • 2009-11-26
    • Formulaction
    • BRUNEL, Laurent
    • G01N21/51
    • G01N21/51G01N2021/4709
    • Device for analyzing a polyphase mixture (2) via a light beam (3) backscattered by said mixture, comprising: a vertical cell (1) capable of containing the polyphase mixture; means (4) for emitting a light beam (5) in the direction of the cell, in such a way that the light beam lies in a vertical plane (PV) covering at least the height (hc) of the cell containing the polyphase mixture (2); means (6) for receiving a light beam (3) backscattered by the polyphase mixture, covering the height of the backscattered light beam (3), extending over the height (hc) of the cell containing the polyphase mixture (2); optical conjugation means (17) placed between the cell (1) and the means (6) for receiving the backscattered beam (3), the receiving means (6) comprising a matrix centre (20) forming a surface for receiving the backscattered beam, lying in vertical and horizontal directions; and means (7) for analyzing the backscattered beam received by the matrix sensor, the light beam (5) emitted in the direction of the cell, adopting, at its interface (9) between the internal surface (10) of the wall (18) of the cell (1) and the polyphase mixture (2), the form of a vertical line (16) the width of which is shorter, preferably very much shorter, than the free transport path (1*) of the polyphase mixture (2).
    • 装置用于经由由所述混合物后向散射光束的多相混合物分析,包括:能够包含多相混合物的垂直细胞; 装置,用于在该单元的方向发射光束,在寻求一种方法所做的光束位于一个垂直(PV),其覆盖至少包含多相混合物中的细胞的平面高度(HC); 装置,用于接收由所述多相混合物反向散射的光束,覆盖后向散射光束的高度,延伸在包含多相混合物中的单元格的高度(HC); 光学共轭的装置的电池和装置之间放置用于接收反向散射的光束,接收装置包括一个矩阵中心,用于接收反向散射的光束,躺在垂直和水平方向形成的表面; 以及用于分析由矩阵传感器,光束在电池的方向上发射,在其细胞和多相混合物中,垂直线的形式的壁的内表面之间的接口采用接收的反向散射光束 所有这一切的宽度更短,优选非常短得多,比多相混合物的自由输送路径。
    • 5. 发明公开
    • PROCEDE ET DISPOSITIF PERMETTANT DE MESURER UN FLUX LUMINEUX RETRODIFFUSE PAR UN MILIEU DISPERSE, NON PERTURBE PAR LES REFLEXIONS AUX INTERFACES
    • 用于测量通过介质的方法和装置分散后向散射光河,不受干扰的表面反射
    • EP1540312A1
    • 2005-06-15
    • EP03762707.2
    • 2003-06-25
    • Formulaction
    • BRUNEL, Laurent
    • G01N21/03G01N15/02G01N21/51
    • G01N21/0303G01N15/0227G01N21/51
    • The invention concerns a method for measuring a light flux (11) backscattered by a dispersed medium (12) located on one first side (13) of a wall, by interaction with a plurality of light rays (15) emitted from the second (16) side of the wall opposite the first side where the dispersed medium is located and towards the latter, the plurality of light rays being adapted to pass through the wall and being backscattered at least partly by the dispersed medium towards reception means (17) arranged on the second side of the wall, said method comprising at least the following steps: emitting said plurality of light rays towards the dispersed medium and through the wall such that the dispersed medium is capable of emitting in turn, through said wall, a plurality of backscattered light rays to form a backscattering spot (19) wherein is defined at least a central zone (20) in the form of a disc whereof the center (21) corresponds to the luminous barycenter of the spot and whereof the radius (36) is equal to four times the maximum free travel path (1*max) of the dispersed medium, the spot being adapted to be imaged on the reception means (17); forming said backscattering spot from the backscattered light rays which have passed through the wall and free, at least in one direction (22) extending from the luminous barycenter of the spot, of light rays derived from the central zone and which have been subjected to total reflection on the surface (30) forming the interface of the wall with the second side; measuring a spatial sample of a profile of the light flux in the resulting spot, extending in the direction (22).
    • 7. 发明公开
    • PROCEDE DE CARACTERISATION RHEOLOGIQUE D'UN MILIEU COMPLEXE
    • 方法流变学表征一个复合培养基
    • EP2430421A1
    • 2012-03-21
    • EP10724724.9
    • 2010-05-12
    • Formulaction
    • BRUNEL, Laurent
    • G01N11/00
    • G01N11/10G01N2011/008
    • The invention relates to a method for the quantitative determination of the viscoelastic properties of a complex medium from the movement of particles in suspension, wherein a sample of the medium is placed in a device for measuring the light diffused by the particles in suspension, suitable for projecting coherent light onto said sample, and for detecting and analysing the diffused light in order to calculate the inter-image distance d
      2 , said method including the steps essentially consisting of: a) characterising the opacity of the medium by measuring the transport length I* of said medium, b) inserting a sample of said medium into a flask with predetermined dimensions; c) placing the flask in a thermostatically controlled measurement chamber (1) of said measurement device; d) projecting a beam of coherent light onto the sample and detecting the light diffused by the particles in the form of a series of sequenced images; e) analysing the movement of the particles according to time by calculating the inter-image distance d
      2 and the ratio d
      2 /d
      2max ; f) establishing an analytic expression E by directly comparing, for the value of I* determined in step a), the ratio d
      2 /d
      2max and the mean square displacement MSD, in order to calculate the viscous and elastic moduli of the medium. The invention also relates to a device for implementing said method.
    • 8. 发明公开
    • PROCEDE ET DISPOSITIF D’ANALYSE DU MOUVEMENT DANS UN MILIEU DIFFUSANT
    • 方法和装置运动的散射介质中分析
    • EP1664744A1
    • 2006-06-07
    • EP04787434.2
    • 2004-09-24
    • Formulaction
    • SNABRE, PatrickBRUNEL, Laurent
    • G01N21/47G01N15/02G01P5/00G01P3/36
    • G01N15/0227G01N21/4795G01N2015/0216G01N2021/479
    • The invention relates to a method of detecting and analysing movement in a scattering medium. The inventive method consists in: projecting a coherent light (1) towards the scattering medium (5); performing a spatial and temporal sampling of the electromagnetic field of the light (6) scattered by the scattering medium, in order to obtain a plurality of images of said electromagnetic field; and analysing the speckle grains resulting from the images obtained from the spatial and temporal sampling of the electromagnetic field of the scattered light, in order to detect and analyse a movement in the scattering medium, said speckle grain analysis step comprising a step consisting in analysing the inter-image distance. The invention also relates to a device for detecting and analysing movement in a scattering medium. The inventive device comprises: means (1) for projecting a coherent light towards the scattering medium (5); matrix sensor means (2) which can be used to perform a spatial and temporal sampling of the electromagnetic field of the light (6) scattered by the scattering medium, in order to obtain a plurality of images of the electromagnetic field; means (3) for observing the images of the electromagnetic field of the scattered light; means (4) for analysing the speckle grains resulting from said images; and means for analysing the inter-image distance.