本文叙述利用计算机干涉图补偿法检验非球面的原理和实验,提出了不引入附加像差的检验系统。文中把计算机干涉图作为补偿片,通过莫尔条纹的形状来评价面形;并对面形和莫尔条纹光强分布之间的关系作了分析,用计算机进行了模拟;讨论了可能影响检验精度的各种因素。所采用的装置不仅简单,且易调整。

One of the auccessfull applications of computer holography is the testing of aspherie surfaces.Computer generated holograms (CGH s) provide an ideal reference wavefront for the test. Thig paper describes briefly the principle and experiment of the testing of aspherics with compensating method using computer-generated interferograms (CGI), and proposes a testing system that does not introduce additional aberration. We used the CGI as a compensating plate and inspected the surface according to Moire fringes. The relation between the aspheric surface figure and the intensiisy distribution of Moire fringes is analysed and simulated on a computer. Various factors that could possibly affect the test precision are discussed. The set-up used is very simple and convenient to adjust.