從理論上的分析，只要測量垂直入射光以及某一角度傾斜入射光的反射率，我們就可以定出非均向性薄膜的三個主軸折射率以及厚度與主軸傾斜角。
前述光線在非均向性與均向性界面會有非對稱的反射情形，伴隨而生的是能量守恆的問題，我們建立以波前偏折的角度來解釋此一現象：反射角與折射角的角度在某種情況下會大於90度。
在實驗方面，我們以全反射衰減法對非對稱反射的理論，作一初步的驗證，排除了過去未考慮非對稱反射的現象。
最後我們將具有表面粗糙度的薄膜，等效看成柱狀結構垂直分佈之非均向性薄膜，這個模型已有學者對無吸收性材料提出，我們以表面電漿在粗糙表面上之行為來對金屬材料的折射率與消光係數建立雙折射的模型。

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