光学薄膜的数字滤波器设计方法  

Optical Thin Films Design Using Digital Filters Method

作　　者：王旭[1] 冯志荣[1] 胡总华[1] 陈秀丽[1] 王全辉[1] 

机构地区：[1]河南师范大学物理与信息工程学院,河南新乡453007

出　　处：《光电工程》2011年第4期82-86,共5页Opto-Electronic Engineering

基　　金：河南省教育厅科技攻关项目(2007510009)

摘　　要：本文给出利用数字滤波器的设计方法设计光学薄膜的具体过程。由数字滤波器设计软件,按照光学薄膜的设计要求给出光学薄膜目标谱传递函数,将光学薄膜传输矩阵表示为格型数字滤波器传输矩阵的数学形式,导出等光学厚度光学薄膜传递函数的递归关系式。利用光学薄膜传递函数递归关系,采用剥层算法计算出各膜层的折射率,得到满足目标谱传递函数的膜系结构。以具有等光学厚度的1/4膜系为例,分别给出四层减反膜和八层反射膜的两个设计实例。Design method for the optical thin film with digital filters method is given.The optical thin films purpose spectra transfer function is obtained by utilizing the digital filters design software.Turning the math form of optical thin film transfer matrix to the lattice digital filters,the recursive relationship between the coefficients of the transfer function is got from the purpose transfer function.The film＇s refractive index of each layer fit for the purpose spectra is designed with layer-peeling method by the recursive relationship.Two examples of four layers anti-reflective and eight layers reflective films design with equal optical thickness are given by this method.

关 键 词：光学薄膜 数字滤波器 递归算法 

分 类 号：O484[理学—固体物理]