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本文采用时域有限差分方法模拟了一维随机粗糙铝表面双向反射分布函数,分析了表面氧化膜厚度对双向反射分布函数的影响.研究结果表明,氧化膜对一维随机粗糙铝表面的双向反射分布特性有很大的影响。双向反射分布函数受入射波的偏振态影响,横电(TE)波产生的影响比横磁(TM)波更大。在TE波入射时会产生镜反射高峰值现象,但在TM波斜入射时会产生较强的倒反射现象.随机粗糙铝表面在不同的自相关长度(T)条件下的BRDF的峰值均随着T的增大而略微有所增大.
In this paper, the time-domain finite difference method is used to simulate the birefringence distribution function of one-dimensional random rough aluminum surface and the influence of surface oxide film thickness on the birefringence distribution function is analyzed.The results show that the birefringence of the oxide film on one-dimensional random rough aluminum surface Distribution characteristics have a great impact. The birefringence distribution function is affected by the polarization state of incident waves, and the effect of transverse electric (TE) waves is greater than that of transverse magnetic (TM) waves. When the TE wave incident, it will produce the peak reflection phenomenon of the mirror, but there will be a strong reflection phenomenon when the TM wave is incident obliquely. The BRDF peaks of random rough aluminum surface under different autocorrelation length (T) The increase of T slightly increased.