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    Sensitive and fast response optical detection of transient motion from a scattering surface by two-wave mixing
    1.
    发明授权
    Sensitive and fast response optical detection of transient motion from a scattering surface by two-wave mixing 失效
    通过双波混频从散射表面的瞬态运动的敏感和快速响应光学检测

    公开(公告)号：US5680212A

    公开(公告)日：1997-10-21

    申请号：US632073

    申请日：1996-04-15

    申请人： Alain Blouin ,  Philippe Delaye ,  Denis Drolet ,  Jean-Pierre Monchalin ,  Gerald Roosen

    发明人： Alain Blouin ,  Philippe Delaye ,  Denis Drolet ,  Jean-Pierre Monchalin ,  Gerald Roosen

    IPC分类号： G01B9/02 ,  G01B9/027 ,  G01B11/16 ,  G01B11/24 ,  G01H9/00 ,  G01N29/00 ,  G01P3/36

    CPC分类号： G01B9/027 ,  G01P3/366

    摘要： A method and apparatus are provided of optically detecting transient motion from the surface of a workpiece. After directing a laser beam onto a surface of a workpiece the beam is reflected from it and then interferes with a pump beam removed from the laser source, inside a real-time holographic material, so as to form a grating diffracting the pump beam into a reference beam, which interferes at the output of the real-time holographic material with the received light beam, so as to produce a signal representative of the surface transient motion. An electric field is applied to the holographic material of sufficient magnitude to increase substantially the intensity of said reference beam and to give to this beam a phase differing substantially from the phase of said received light beam. The electric field is applied prior to the transient motion to be detected, for a time interval sufficiently long so as to capture the transient motion but sufficiently short a duration so as to avoid excessive heating of the real-time holographic material. The pump beam is of sufficiently high intensity so as to cause the response time of the real-time holographic material to be substantially shorter than a characteristic time defined as the time during which the phase of the received light, on average across its spatial distribution or locally, is not substantially changed.

    摘要翻译： 提供了一种从工件的表面光学地检测瞬态运动的方法和装置。 在将激光束引导到工件的表面上之后，光束从其反射，然后干扰在实时全息材料内部从激光源移除的泵浦光束，以便形成将泵浦光束衍射成 参考光束，其利用接收的光束干扰实时全息材料的输出，以便产生表示表面瞬态运动的信号。 对足够量级的全息材料施加电场，以基本上增加所述参考光束的强度，并向该光束提供与所述接收光束的相位基本相位的相位。 在要被检测的瞬态运动之前施加电场足够长的时间间隔，以捕获瞬态运动，但足够短的持续时间，以避免实时全息材料的过度加热。 泵浦光束具有足够高的强度，以便使实时全息材料的响应时间显着短于被定义为平均在其空间分布上的接收光的相位的时间的特征时间，或者 在本地，实质上没有改变。

    Gyros having an optical fiber loop and a dual phase-conjugate mirror
    3.
    发明授权
    Gyros having an optical fiber loop and a dual phase-conjugate mirror 失效
    陀螺仪具有光纤回路和双相位共轭反射镜

    公开(公告)号：US06222633B1

    公开(公告)日：2001-04-24

    申请号：US09477647

    申请日：2000-01-05

    申请人： Jean Thierry Audren ,  Gerald Roosen ,  Philippe Delaye

    发明人： Jean Thierry Audren ,  Gerald Roosen ,  Philippe Delaye

    IPC分类号： G01C1972

    CPC分类号： G01C19/72

    摘要： A gyroscope comprising a source for emitting a light beam, an optical fiber loop in which the light propagates in both directions, a dual phase-conjugate mirror disposed in said loop in such a manner that light reaches said mirror from both sides thereof, recombination means for recombining the light which has propagated round the loop, and detector means for detecting the recombined signal, wherein the loop includes a monomode fiber that does not conserve polarization and wherein depolarization means are disposed between said fiber and the phase-conjugate mirror, on either side thereof.

    摘要翻译： 一种陀螺仪，包括用于发射光束的光源，其中光沿两个方向传播的光纤环路，设置在所述环路中的双相位共轭反射镜，使得光从其两侧到达所述反射镜，复合装置 用于重组在环路周围传播的光;以及检测器装置，用于检测重组信号，其中环路包括不保存极化的单模光纤，并且其中去极化装置设置在所述光纤和相位共轭反射镜之间， 侧。

    Dynamic holographic velocimeter for the measurement of vibrations
    5.
    发明授权
    Dynamic holographic velocimeter for the measurement of vibrations 失效
    动态全息测速仪用于测量振动

    公开(公告)号：US06486959B2

    公开(公告)日：2002-11-26

    申请号：US09754615

    申请日：2001-01-04

    申请人： Philippe Delaye ,  Gérald Roosen

    发明人： Philippe Delaye ,  Gérald Roosen

    IPC分类号： G01B902

    CPC分类号： G01H17/00 ,  G01S17/58 ,  G03H2001/0033

    摘要： A process for velocimetric measurement of a target including causing interference in a dynamic holographic material of a reference laser beam and a beam diffused by the target, and measuring variations in luminous intensity transmitted by the material with a photoelectric detector, wherein the target vibrates with a displacement greater than the wavelength and with an extension limited around a mean position.

    摘要翻译： 一种用于目标的速度测量的方法，包括引起参考激光束的动态全息材料和由靶扩散的光束的干涉，以及测量由光电检测器传输的材料的发光强度的变化，其中目标用 位移大于波长，并且延伸限制在平均位置附近。