The results show that logarithmic light intensity fluctuation variance will be less when light source coherence becomes worse, i. e. it becomes into partially coherent light.

其结果表明，当光源的相干性变差，即变为部分相干光后，对数光强起伏方差变小；

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The scattering light of bubble is analysed from the point of view of geometry optics, from which it is concluded that the fluctuation of light intensity has some relation with the diameter of bubbles.

从几何光学的角度出发分析了气泡对光的散射，得出散射光强的波动特性与气泡的直径存在一定的关系。

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In addition, the measured result is free of the intensity fluctuation of light source.

另外光源光强的波动对测量结果没有影响。

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