从原理上对子孔径拼接的基本算法与迭代算法即SASL算法进行了比较分析,提出利用SASL算法中重叠计算子问题的求解方法来确定基本算法中的重叠对应关系,并对两种算法的性能进行了对比研究。结果表明SASL算法对于子孔径的对准误差更不敏感,拼接测量结果更为可靠,且适用于平面、球面和非球面。 In principle, the basic algorithm of sub-aperture splicing is compared with the iterative algorithm, that is, the SASL algorithm. The method of solving overlapping sub-problems in SASL algorithm is proposed to determine the overlapping correspondence in the basic algorithm and the performance of the two algorithms Conducted a comparative study. The results show that the SASL algorithm is less sensitive to sub-aperture alignment errors and the stitching results are more reliable and suitable for plane, spherical and aspheric surfaces.