用二元光学技术制作的多通道频谱分析元件

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。

Multichannel Frequency Spectrum Analysis Elements Made by Binary Optical Technology

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.