菲涅耳深区的散斑光强概率密度  

SPECKLE INTENSITY PROBABILITY DENSITY IN DEEP FRESNEL DIFFRACTION REGION

作　　者：陈小艺[1] 滕树云[1] 宋洪胜[2] 程传福[1] 

机构地区：[1]山东师范大学物理与电子科学学院,济南250014 [2]山东建筑工程学院,济南250014

出　　处：《山东师范大学学报（自然科学版）》2006年第2期48-50,共3页Journal of Shandong Normal University(Natural Science)

基　　金：国家自然科学基金资助项目(69978012)

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.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.

关 键 词：菲涅耳深区 随机表面 散斑光强概率密度 

分 类 号：TP274.2[自动化与计算机技术—检测技术与自动化装置]