【摘要】 利用基尔霍夫衍射理论分析了菲涅耳深区内的散斑场,得到了菲涅耳深区散斑光强的一般表达式.通过数值计算研究了菲涅耳深区的散斑光强分布,并由所得的光强数据统计计算了菲涅耳深区散斑光强概率密度,分析讨论了菲涅耳深区散斑光强概率密度随散射距离的演化规律.更多还原

【Abstract】 Basing on the light diffracting theory of Kirchhoff, we obtain the expression for the intensity of speckles in deep Fresnel diffraction region. We generate numerically the random self-affine fractal surfaces and calculate the speckle intensity scattered by these scattering surfaces. Basing on the intensity data, we obtain the distribution of the speckle probability density in deep Fresnel diffraction region by the histogram statistics and discuss in detail the variations of the speckle intensity probability density with the distance from the random surface.更多还原