In the new method, the spectrum measured value was firstly normalized to eliminate the intensity modulation, and an initial value of Optical Path Difference (OPD) was calculated by extremum method.

 
  • 该方法首先对干涉谱测量值进行归一化处理,消除低频光强变化的影响,并用极值法求得光程差(OPD)的初值。
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