吸收基底上反射消偏振膜设计

在吸收基底上镀单层特定折射率n_1和厚度d的介质膜,可对波长为λ,入射角为φ的倾斜入射光实现反射消偏振:R_p=R_s。尽管可用迭代法求n_1乃至d的数值解,但本文注重分析一种简单而又不失精确地确定n_1和d的方法。并通过实例,分析了在应用中应注意的问题。

Design of Reflective Depolarising Films Coated on an Absorbing Substrate

The incident light tilted can be brought into depolarization by help of coating the dielectric film of given reflective index n_1 and thickness don the absorbing substrate, namely R_p=R_s, The emphasis is laid on the analysis relevant to a simple and precision determination on n, and d, although the overlap method can be used to find the numeric solution of n_1 and d. Some problems in connection with the method are analysed through exsamples.