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    • 13. 发明授权
    • Covert laser remote sensing and vibrometry
    • 隐蔽激光遥感和振动测量
    • US08210044B1
    • 2012-07-03
    • US12288011
    • 2008-10-14
    • Lutfollah MalekiNan YuAndrey B. MatskoAnatoliy Savchenkov
    • Lutfollah MalekiNan YuAndrey B. MatskoAnatoliy Savchenkov
    • G01N29/24G01N29/46
    • G01N29/2418G01N29/46
    • Designs of single-beam laser vibrometry systems and methods. For example, a method for detecting vibrations of a target based on optical sensing is provided to include operating a laser to produce a laser probe beam at a laser frequency and modulated at a modulation frequency onto a target; collecting light at or near the laser to collect light from the target while the target is being illuminated by the laser probe beam through an optical receiver aperture; using a narrow-band optical filter centered at the laser frequency to filter light collected from the optical receiver aperture to transmit light at the laser frequency while blocking light at other frequencies; using an optical detector to convert filtered light from the narrow-band optical filter to produce a receiver electrical signal; using a lock-in amplifier to detect and amplify the receiver electrical signal at the modulation frequency while rejecting signal components at other frequencies to produce an amplified receiver electrical signal; processing the amplified receiver electrical signal to extract information on vibrations of the target carried by reflected laser probe beam in the collected light; and controlling optical power of the laser probe beam at the target to follow optical power of background illumination at the target.
    • 单光束激光振动测量系统和方法的设计。 例如,提供了一种用于检测基于光学感测的目标的振动的方法,包括操作激光以产生激光频率的激光探测光束并以调制频率调制到目标上; 在所述激光探测光束通过光接收器孔照射所述目标时,在所述激光器处或附近收集光以从所述目标收集光; 使用以激光频率为中心的窄带滤光器来滤光从光接收器孔收集的光以透射激光频率的光,同时阻挡其他频率的光; 使用光学检测器来转换来自窄带滤光器的滤波光,以产生接收器电信号; 使用锁定放大器在抑制其他频率处的信号分量的同时,以调制频率检测和放大接收机电信号,以产生放大的接收机电信号; 处理放大的接收机电信号以提取关于在所收集的光中由反射的激光探测光束承载的目标的振动的信息; 并且控制激光探测光束在目标处的光功率,以跟踪目标的背景光的光功率。