laser heterodyne measurement is a detection technique with high sensitivity and it has wide applications in the domains of ranging, tachometry, guidance, tracking and so on.
激光外差探测是一种高灵敏度的探测技术,在测距、测速、制导、跟蹤等领域有着广泛的应用。
the theory of the optical heterodyne measurement system is expounded and the principle and merit of ultrasound pulse generated by a laser pulse are analyzed.
对光外差系统的测量原理进行了说明,分析了由激光脉沖激励超声的原理和优点。
this paper describes a new method, doppler heterodyne measurement method of surface profile, using a simultaneous phase comparator.