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一、线路简单介绍计数是一种最简单而又最基本的运算。在本干涉仪中计数器是用来把光靶移动过程中通过相应线路所产生的一系列脉冲信号如数的计下来。若光靶移动速度为10米/分,那么要求计数器的最低工作频率为f_(min)为:f=(2v)/λ……在四倍频前电信号频率;f_1=4×(2v)/λ……在四倍频后电信号频率,
First, a simple line Introduction Counting is one of the most simple and most basic operations. In this interferometer counter is used to move the light target through the corresponding line generated by a series of pulse signal count down. If the moving speed of the light target is 10m / min, then the minimum operating frequency of the counter is required to be f_ (min): f = (2v) / λ ... the frequency of the electrical signal before quadruple the frequency f_1 = 4 × (2v) / λ ... After the quadruple frequency signal frequency,