A discussion is given of the method of determining the position of the focal point when the measured lens is with primary astigmatism. The measuring results are also included.
被测物镜有初级象散时确定焦点位置的方法，并给出了测量结果。
The principle and method of astigmatism correction were analyzed in detail, and the initial parameter computing was programed.
具体分析了像差校正的原理和方法，编制了初始结构快速计算程序。
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