激光巨脉冲在金属铝块上产生超声波，由光学零差探测得到超声引起的后表面位移的波形。
A laser huge pulse irradiates on aluminium plates to cause ultrasonic waves. The waveform of the rear surface displacement produced by ultrasounds is detected with optical homodyne.
结合最新的零差式干涉探测技术，初步研制出激光散斑分辨雷达自动测量系统。
With the former experience and up to date technology about homodyne interferometer detection, a kind of automatically scaling system on laser speckle radar is developed.
采用零差的相干探测方式，设计并实现了一套光纤结构的激光多普勒振动计。
Using the way of homodyne coherent detection, a fiber laser Doppler vibrometer is designed and completed.
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