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Investigation of statistical properties of dynamic speckles formed by focused Gaussian beam diffraction from a moving surface

机译:高斯光束聚焦于运动表面的动态斑点统计特性研究

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Abstract: In the paper the focused Gaussian beams diffraction from random surfaces which obey first- order Gaussian statistics is considered. The analytical expressions describing the probability density function and the correlation function of dynamic speckles intensity fluctuations and phase for different relations between the surface and the coherent beam parameters have been derived. The results of numerical simulation of focused coherent beam scattering for a small number of scatterers are discussed. The range of parameters, when the scattered field complex statistics are close to Gaussian ones, has been determined. Dependence of statistical characteristics of diffracted radiation on the correlation length and the standard deviation of random screen phase fluctuations has been studied. !6
机译:摘要:本文考虑了服从一阶高斯统计量的随机表面的聚焦高斯光束衍射。推导了解析表达式,描述了表面和相干光束参数之间不同关系的动态斑点强度起伏和相位的概率密度函数和相关函数。讨论了少数散射体聚焦相干光束散射的数值模拟结果。确定了散射场复数统计量接近高斯统计量时的参数范围。研究了衍射辐射的统计特性对相关长度和随机屏幕相位波动标准偏差的依赖性。 !6

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