The coma aberation and astigmation are rec t ified through carefully selecting the position of aperture stop and the paramete rs of the quadratic surface.
仔细选取系统
光阑位置，选取二次曲面系数
二次曲面位置，可
系统参差
。
差;
;性The coma aberation and astigmation are rec t ified through carefully selecting the position of aperture stop and the paramete rs of the quadratic surface.
仔细选取系统光阑位置，选取二次曲面系数二次曲面位置，可系统参差。
As a practical example, an astigmation corrected scanning flat holographio concave grating (SFHCG) is designed and some results of the numerical and optical experiments are given.
给出一消SFHCG设计实例和用这块光栅所做实验结果。
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