力过程是整个系统的关键。激光打靶的打靶过程，由激光枪发射激光脉冲信号，光电靶接收激光脉冲信号，经过系列信号处理过程最终得到打靶的结果。光电靶由许多块的光电探测器组成，每块不同位置的光电探测器对应不同编号，从打靶的实际情况出发，确定了相应的编号规则。打靶的成-counting ceHs manually，live cells are recognized and counted automatically by image-analyzing technique．Two methods are

提出一种基于快速傅里叶变换( F F T)提取相位的方法, 分析自混合干涉信号, 不增加系统复杂度就能将激光自混合( SM LD) 微位移测量精度提高到纳米量级。(A phase extraction method based on F F T is proposed. The self mixing interference signal is analyzed, and the accuracy of the self mixing (SM LD) micro displacement me