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介绍一种利用激光多谱勒效应连续测量抛射体和靶样品自由面速度变化的装置。它实际上是对位移干涉仪的一种改进,利用空间角度效应使两光束差频减小1—2个量级,因而扩大了测速范围。 该装置适于测量每秒几十米至几百米的速度。它的主要优点是设备简单,装校容易,并且可以灵活地调节量程以适合测量各种不同的速度。在中、低速范围的冲击波研究和其它研究项目中有广泛的用途。
A device for continuously measuring the change of free surface velocities of projectile and target sample by laser Doppler effect is introduced. It is actually an improvement on a displacement interferometer that utilizes a space-angle effect to reduce the difference between the two beams by one or two orders of magnitude, thereby expanding the range of the velocity measurement. The device is suitable for measuring tens of meters to hundreds of meters per second speed. Its main advantage is simple equipment, easy to install, and can flexibly adjust the range to suit a variety of different speeds. In the low-speed range of shock wave research and other research projects have a wide range of uses.