p-偏振双面反射法测定偶氮染料掺杂PMMA薄膜光学参数

基于p-偏振光双面反射法，提出了一种新的测量单面涂膜不对称膜系光学参数的方法，理论上分析了反射光强比γ随膜层折射率、消光系数及膜厚变化的规律，实验上测量了两种不同入射方式下偶氮染料掺杂聚甲基丙烯酸甲脂（PMMA）薄膜反射光强比γ的角度调制曲线，通过数值模拟与结果修正，准确地获得了该薄膜的光学参数。实验结果与理论模拟符合得很好。

Measurement of Optical Parameters of Azo-dyes Doped PMMA Films by p-polarized Reflectance

Based on p-polarized reflectance, a novel method for measuring the optical parameters of the films coated on one side of the transparent plane plate is presented. The dependence of the reflectance ratio γ on the refractive index n, extinction coefficient k and thickness h of the films is analyzed. The γ angular modulation curves of azo-dye doped PMMA films with two incident modes was experimentally measured. By data simulation and calculating model correction, the optical parameters of the films are precisely obtained. The experimental results coincide well with the theoretical analysis.