Jiang Zhenfei, Zhu Li, Ji Xiaoling, Cheng Ke, Wang Tao
J Opt Soc Am A Opt Image Sci Vis. 2017 Aug 1;34(8):1463-1468. doi: 10.1364/JOSAA.34.001463.
A model of anisotropic quasi-homogeneous media with adjustable boundaries is presented with the help of the three-dimensional multi-Gaussian function. After that, the behaviors of the far-zone field of light waves on scattering from an anisotropic semisoft-boundary quasi-homogeneous medium are illustrated. It is shown that the spectral density of the scattered field is flattened-Gaussian-centered, owing to the semisoft boundary of the scatterer, while the spectral degree of coherence is Gaussian-centered, which is independent of the boundary of scatterer. It is also shown that both the spectral density and the spectral degree of coherence are anisotropic because of the anisotropy of the scattering medium.
借助三维多重高斯函数，提出了一种具有可调整边界的各向异性准均匀介质模型。在此之后，阐述了光波在各向异性半软边界准均匀介质上散射时远区场的行为。结果表明，由于散射体的半软边界，散射场的谱密度是以高斯分布为中心的扁平状，而谱相干度是以高斯分布为中心的，且与散射体的边界无关。还表明，由于散射介质的各向异性，谱密度和谱相干度都是各向异性的。
