用于分离目标共焦成象的WZP双焦距系统的设计与实验

Design and Experiment: oF WZP BiFocal System For Two-separated-object Confocal lmgery

本文讨论了位相波带板(WZP)和普通镜头组合而成的双焦距成象系统的原理和设计公式,分析了象差,研究了环带数N的选择,示出了不同分离间隔下分划板对的共焦成象照片,並列出倍率差的测量结果。实验证明:环带数N不大的WZP双焦系统甚至可以在白光下工作。

This paper discusses the principle of a bifocal imagery system based on the combination of a phase-reversal zone plate, WZP,and an ordinary lens, gives formulas for the design, investigate the question of zone plate selection, demonstrats some simutaneously-imaging photographs of a pair of reticles under different separations, and finally tabulates experimental data for the magni- fication variation of the system to confirm theoretical treatment.It is attractive that the WZP bifocal system with small zone number N is proved to be able to work under white light.