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提出一种近似的方法 ,其考虑具有望远镜系统的光栅展宽器的有效光栅间距 ,以补偿球差。给出二阶色散和四阶色散的修正量公式。据此 ,可得出对实验元件性能的具体要求。
An approximate method is proposed that considers the effective grating spacing of a grating stretcher with a telescope system to compensate for spherical aberration. The formulas for the correction of second-order dispersion and fourth-order dispersion are given. Based on this, the specific requirements for experimental element performance can be derived.