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    APPARATUS AND METHOD FOR TWO WAVE MIXING (TWM) BASED ULTRASONIC LASER TESTING
    31.
    发明申请
    APPARATUS AND METHOD FOR TWO WAVE MIXING (TWM) BASED ULTRASONIC LASER TESTING 有权
    用于双波混频（TWM）的超声波激光测试的装置和方法

    公开(公告)号：US20080316498A1

    公开(公告)日：2008-12-25

    申请号：US11553485

    申请日：2006-10-27

    申请人： Thomas E. Drake, JR. ,  Marc Dubois

    发明人： Thomas E. Drake, JR. ,  Marc Dubois

    IPC分类号： G01B9/02

    CPC分类号： G01N29/2418 ,  G01B9/02083 ,  G01B2290/65 ,  G01N2291/0231

    摘要： A system and method for detecting ultrasonic surface displacements at a remote target are disclosed, one embodiment of the system comprising: a first laser to generate a first laser beam. The first laser beam produces ultrasonic surface displacements on a surface of the remote target. A second laser generates a second laser beam operable to detect the ultrasonic surface displacements on the surface of the remote target and to provide a reference beam to an interferometer. The second laser beam is split, at a beam-splitter, into a pump beam and a probe beam. The pump beam is amplified by a first amplifier and the probe beam is amplified by a second amplifier. The pump beam is then provided to the interferometer as a reference beam and the probe beam is directed to the target to detect the ultrasonic surface displacements. The first and second amplifiers can be controlled independently of one another to control their respective laser beam's power. Collection optics collect phase modulated light from the probe beam either reflected or scattered by the remote target, which can be optionally optically processed to increase the light intensity. The interferometer is a TWM interferometer that receives and processes the phase modulated light and generates at least one output signal based on the phase-modulated light and the amplified reference laser beam.

    摘要翻译： 公开了一种用于在远程目标处检测超声表面位移的系统和方法，该系统的一个实施例包括：第一激光器，用于产生第一激光束。 第一激光束在远程目标的表面上产生超声表面位移。 第二激光器产生可操作以检测远程目标表面上的超声波表面位移并向干涉仪提供参考光束的第二激光束。 第二激光束在分束器处分成泵浦光束和探测光束。 泵浦光束由第一放大器放大，并且探测光束被第二放大器放大。 然后将泵浦光束作为参考光束提供给干涉仪，并将探测光束引导到目标以检测超声波表面位移。 可以彼此独立地控制第一和第二放大器以控制它们各自的激光束的功率。 收集光学器件收集来自探测光束的相位调制光，其被远程目标物反射或散射，其可以可选地被光学处理以增加光强度。 干涉仪是TWM干涉仪，其接收和处理相位调制光并且基于相位调制光和放大的参考激光束产生至少一个输出信号。

    Fiber-based mid-infrared generation laser for laser ultrasound inspection
    32.
    发明申请
    Fiber-based mid-infrared generation laser for laser ultrasound inspection 有权
    用于激光超声波检测的基于光纤的中红外发生激光

    公开(公告)号：US20080291963A1

    公开(公告)日：2008-11-27

    申请号：US11524046

    申请日：2006-09-20

    申请人： John B. Deaton, JR. ,  Marc Dubois ,  Kenneth R. Yawn ,  Jeffery E. Maestas ,  Thomas E. Drake, JR.

    发明人： John B. Deaton, JR. ,  Marc Dubois ,  Kenneth R. Yawn ,  Jeffery E. Maestas ,  Thomas E. Drake, JR.

    IPC分类号： H01S3/09

    CPC分类号： G01N29/2418 ,  G01N2291/0231

    摘要： Embodiments of the present invention relate to a laser system and method for the optical generation of ultrasound at a remote target. This involves generating a pump laser beam with a diode-pumped fiber laser. The diode pumped fiber laser is fiber-coupled with an optical fiber, either passive or diode pumped, to a generation laser head. The generation laser head generates a generation laser beam from the pump laser beam and directs the generation laser beam to the surface of the remote target. The interaction between generation laser beam and the surface of the remote target results in ultrasonic displacements at the remote target. These ultrasonic displacements may be sampled in order to assess and inspect the remote target.

    摘要翻译： 本发明的实施例涉及一种用于在远程目标处产生超声波的激光系统和方法。 这涉及用二极管泵浦的光纤激光器产生泵浦激光束。 二极管泵浦光纤激光器与被泵浦或无源二极管的光纤耦合到一代激光头。 一代激光头从泵浦激光束产生一代激光束并将生成的激光束引导到远程靶的表面。 发射激光束和远程目标表面之间的相互作用导致远程目标的超声波位移。 可以对这些超声波位移进行采样，以评估和检查远程目标。

    Laser-ultrasound inspection using infrared thermography
    36.
    发明授权
    Laser-ultrasound inspection using infrared thermography 失效
    使用红外热像仪进行激光超声检查

    公开(公告)号：US07605924B2

    公开(公告)日：2009-10-20

    申请号：US11567405

    申请日：2006-12-06

    申请人： Donald Robert Howard ,  Harry Israel Ringermacher ,  Marc Dubois ,  Timothy Gerard Richter ,  Thomas E. Drake

    发明人： Donald Robert Howard ,  Harry Israel Ringermacher ,  Marc Dubois ,  Timothy Gerard Richter ,  Thomas E. Drake

    IPC分类号： G01B11/00

    CPC分类号： G01N29/2418 ,  G01N25/72 ,  G01N29/228 ,  G01N2291/0231 ,  G01N2291/02881

    摘要： An inspection system is provided to examine internal structures of a target material. This inspection system combines an ultrasonic inspection system and a thermographic inspection system. The thermographic inspection system is attached to ultrasonic inspection and modified to enable thermographic inspection of target materials at distances compatible with laser ultrasonic inspection. Quantitative information is obtained using depth infrared (IR) imaging on the target material. The IR imaging and laser-ultrasound results are combined and projected on a 3D projection of complex shape composites. The thermographic results complement the laser-ultrasound results and yield information about the target material's internal structure that is more complete and more reliable, especially when the target materials are thin composite parts.

    摘要翻译： 提供检查系统来检查目标材料的内部结构。 该检测系统结合了超声波检测系统和热成像检测系统。 热成像检测系统连接超声波检查，并进行了修改，以便在与激光超声波检测相匹配的距离内对目标材料进行热成像检测。 使用目标材料上的深度红外（IR）成像获得定量信息。 将IR成像和激光超声结果组合并投影在复杂形状复合材料的3D投影上。 热成像结果补充了激光超声结果，并产生了关于目标材料的内部结构的更完整和更可靠的信息，特别是当目标材料是薄的复合部件时。

    System and method to decrease probe size for improved laser ultrasound detection
    37.
    发明授权
    System and method to decrease probe size for improved laser ultrasound detection 失效
    减少探针尺寸的系统和方法，以改善激光超声检测

    公开(公告)号：US07576848B2

    公开(公告)日：2009-08-18

    申请号：US11018994

    申请日：2004-12-21

    申请人： Marc Dubois ,  Thomas E. Drake, Jr. ,  Pavel Fomitchov

    发明人： Marc Dubois ,  Thomas E. Drake, Jr. ,  Pavel Fomitchov

    IPC分类号： G01N21/00

    CPC分类号： G01N21/474 ,  G01N21/1702 ,  G01N29/2418

    摘要： The present invention provides a compact optical probe assembly that measures ultrasound in materials. The probe uses angle-terminated optical fiber to direct illumination laser light at the surface of a remote target. Ultrasonic displacements at the surface scatter the illumination laser light. Angle-terminated optical fibers collect phase modulated light and direct the phase modulated light to an optical processor to produce a signal representative of the ultrasonic surface displacements. The probe may also incorporate angle-terminated optical fibers to direct generation laser light to the surface of a remote target to generate ultrasonic surface displacements. Optional shared beam forming element(s) may optically act on the illumination laser and collected phase modulated light.

    摘要翻译： 本发明提供一种测量材料中的超声波的紧凑型光学探针组件。 探头使用角度端接的光纤将照明激光引导到远程目标的表面。 表面的超声波位移散射照明激光。 角度端接的光纤收集相位调制的光并将相位调制的光引导到光学处理器以产生代表超声表面位移的信号。 探针还可以包括角度端接的光纤以将生成的激光引导到远程目标的表面以产生超声表面位移。 可选的共享波束形成元件可以光学地作用于照明激光器和收集的相位调制光。

    Enclosed Laser-Ultrasonic Inspection System
    38.
    发明申请
    Enclosed Laser-Ultrasonic Inspection System 审中-公开
    封闭式激光超声波检测系统

    公开(公告)号：US20120320383A1

    公开(公告)日：2012-12-20

    申请号：US13523027

    申请日：2012-06-14

    申请人： Marc Dubois ,  Thomas E. Drake

    发明人： Marc Dubois ,  Thomas E. Drake

    IPC分类号： G01N29/04 ,  G01H9/00

    CPC分类号： G01N29/043 ,  G01N29/2418 ,  G01N2291/0231

    摘要： A laser ultrasonic inspection system comprises laser sources configured to generate laser beams, an optical scanner configured to direct the laser beams onto an object thereby generating ultrasonic waves in the object and illuminating the object, an interferometer configured to generate an electrical signal in response to the reflected light, and a radiation restricting inspection chamber for housing the object. Another laser ultrasonic inspection system comprises a radiation restricting inspection chamber, laser sources located outside of the inspection chamber, an optical scanner located inside the inspection chamber, a visible laser tracer representative of the orientation of the laser beams; an interferometer, a scanner positioning mechanism, and an object positioning mechanism. A method for inspecting an object comprises the steps of positioning an object inside of an inspection chamber, defining a scanning profile, and directing laser beams onto the object according to the inspection profile.

    摘要翻译： 激光超声波检查系统包括被配置为产生激光束的激光源，被配置为将激光束引导到物体上的光学扫描器，从而在物体中产生超声波并照亮物体;干涉仪，被配置为响应于该物体而产生电信号 反射光和用于容纳物体的辐射限制检查室。 另一种激光超声波检查系统包括辐射限制检查室，位于检查室外部的激光源，位于检查室内的光学扫描器，代表激光束取向的可见激光跟踪器; 干涉仪，扫描仪定位机构和物体定位机构。 用于检查物体的方法包括以下步骤：将物体定位在检查室内，限定扫描轮廓，以及根据检查轮廓将激光束引导到物体上。