本文建立镜反射不透明表面下,非均匀光学物性纯吸收性介质内的红外辐射传输模型.红外辐射在折射率连续变化的介质内沿曲线传输.将非均匀介质沿厚度方向离散成n个物性均匀的等温微层,每个微层内辐射沿直线传播,光滑曲线传输路径即离散成首尾相连的折线系列.采用多层辐射传输模型,利用射线踪迹法建立非均匀介质内的红外辐射传输模型.在多层模型中,相邻两微层间的界面引入折射/全反射判据,避免了界面处的积分奇异现象和原本不存在的界面反射现象.
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