为了求解两个同心圆的半径，必须计算分析各测点对之间的噪声相干性和信号相干性。

We must analysis the coherence of noise and signal of every site pairs for the comfirmation of the two radius.

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通过对振幅调制半径、调制位置、透射率以及空间位置和相干长度参数的改变，可以获得不同形状的光强分布。

Different shapes of intensity distribution can be gotten by changing the parameters of radius, location, transmittance of amplitude modulations and spatial position, and the coherence length.

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