分析了用于自适应光学波前补偿实验的对流湍流池折射率和光强起伏的空间、 时间结构, 建立了平均速度很小或等于零时的相关函数, 讨论了速度起伏对相关的扩散作用。 数值计算和实测的结果表明: 速度起伏不仅使时间相关减小, 而且使频谱的内尺度减小。

The spatial and temporal correlations of refraction index and irradiance scintillation in the convective turbulent tank for adaptive optics wavefront compensitive experiments are analyzed. The correlation functions are developed when the average velocity U0～0 or U0=0. The diffusion due to turbulent evolution increased is discussed in detail when velocity fluctuations V′ enlerging. The numerical calculation and experimental results show that temporal correlation decreases more rapidly and inner scale of frequency spectrum gets smaller due to turbulent evolution.