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    • 10. 发明授权
    • Laser-amplified motion detector and method
    • 激光放大运动检测器和方法
    • US5029023A
    • 1991-07-02
    • US414897
    • 1989-09-29
    • Alan J. BeardenMichael P. O'Neill
    • Alan J. BeardenMichael P. O'Neill
    • G01B11/30G02B21/00G11B7/00G11B7/004G11B7/0045G11B7/125G11B7/20G11B7/26
    • G02B21/00G11B7/004
    • Method and apparatus for measuring nanometer or picometer surface displacements in a target surface. A laser beam is directed against the target surface, and time-dependent variations in laser output power are measured. These variations, which are due to non-specular reflection of the incident beam by the target and reentry of the retroreflected light into the laser cavity, are used to determine time-dependent displacements at the target surface, based on a linear relationship between the measured power variations and surface displacements. The invention is useful for determining microscopic surface features of a surface, for high-density laser optical disc data storage and retrieval, and as an ultrasensitive transducer for sound or mechanical vibrations.
    • 用于测量目标表面中的纳米或皮克表面位移的方法和装置。 激光束被引导到目标表面,并且测量激光输出功率的时间依赖性变化。 这些变化是由于目标的入射光束的非镜面反射和回射光进入激光腔的重入,用于基于所测量的目标表面之间的线性关系来确定目标表面上的时间依赖位移 功率变化和表面位移。 本发明可用于确定表面的微观表面特征,用于高密度激光光盘数据存储和检索,以及用作声音或机械振动的超灵敏传感器。