准均匀介质散射场强度相关性的理论研究  

Theoretical study of correlation between intensity fluctuations of scattered field by quasi-homogeneous media

作　　者：何颖君[1] 

机构地区：[1]广东海洋大学理学院,广东湛江524088

出　　处：《贵州大学学报（自然科学版）》2008年第4期365-367,共3页Journal of Guizhou University:Natural Sciences

摘　　要：本文理论研究准均匀随机介质散射场的强度相关性。以空间-频率域中的互相关理论为基础,在一阶玻恩近似范围内,推导了两点之间散射势相关性成高斯分布的准均匀随机介质远场散射场的强度起伏相关性,得到的解析结果表明,远场散射场空间两点之间的强度起伏相关函数与散射介质的散射势谱密度函数和相关函数有关,并可以表示为两者三维空间傅立叶变换的乘积的形式。We study in this paper the correlation between the fluctuations of the intensity at two space points in the far field generated by a quasi-homogeneous media with incident plane wave. With the help of coherence theory in space-frequency domain and in the framework of first-order Born approximation, we obtained our main results which indicate that, for a quasi-homogeneous media with Gaussian correlated scattering potential, the correlation between intensity fluctuations at two points is proportional to the product of the three dimensional Fourier transforms of the strength and correlation function of the scattering potential of the media.

关 键 词：相关性 散射 随机介质 

分 类 号：O436.2[机械工程—光学工程]