基于混浊介质的调制传递函数(MTF)和在各向同性漫射光源照射下平行平面混浊介质出射光强度分布之间的等效原理，利用辐射传输算法DISORT数值计算了几种典型的均匀大气混浊介质的MTF，获得了整个空间频域内MTF的一般特征。结果显示，大气介质的MTF不但依赖于介质的光学厚度（散射和吸收），也依赖于介质的散射相函数。给出了大气介质的MTF与光学厚度、散射相函数种类、单次反照率和非对称因子等因素的定量依赖关系。

Based on the equivalence of the modulation transfer function (MTF) of a plane parallel turbid medium and the emergent light intensity distribution from the medium under isotropic diffuse illumination, the MTF of some typical turbid media is fully evaluated through numerical solution with a radiation transfer code DISORT. General MTF characteristics in the whole spatial frequency range are obtained. It is found that the MTF behavior depends not only on the scattering and absorption optical thickness of the medium but also on the scattering phase function. General features of the dependence of MTF on the optical thickness, the scattering phase function, the single scattering albedo, and the asymmetric factor are presented.