用二元光学技术制作的多通道频谱分析元件  

Multichannel Frequency Spectrum Analysis Elements Made by Binary Optical Technology

作　　者：梁佩莹[1] 周进[1] 沐仁旺[1] 高文琦[1] 

机构地区：[1]南京大学物理系,南京210093

出　　处：《中国激光》1999年第11期993-996,共4页Chinese Journal of Lasers

基　　金：江苏省自然科学基金

摘　　要：介绍了两种二元光学组合元件：一种是两个线型波带板的组合，其效果相当于两个柱面透镜的组合；另一种是一个线型波带板和一个圆型波带板的组合，效果相当于一个凸透镜和一个柱面透镜的组合。这两种元件在x方向的焦距均为y方向焦距的两倍，如果把物放在此二种元件前fx焦平面处，则在元件后fx焦平面上，x方向可以产生傅里叶频谱，y方向可以产生等大倒像，从而具有多通道频谱分析的功能。给出了制作这两种元件的原理、方法、参数和相应的实验结果。Two kinds of binary optical elements used in the multichannel frequency spectrum analysis are introduced. One is prepared by overlapping two line-type zone plates. It acts as a two-cylindrical lens system. The other is prepared by overlapping a line-type zone plate and a circular zone plate. It has the effect of a system that consists of a cylindrical lens and a spherical lens. The focal length in x direction of these elements is two times that in y direction, so that if put an object in the focal distance (fx), its Fourier frequency spectrum in x direction and its image in y direction on the focal plane in the distance fx can be got. In this paper, the principle, the technique, the data and the result of these elements are also given.

关 键 词：二元光学元件 傅里叶频谱 频谱分析元件 

分 类 号：O433.4[机械工程—光学工程]