径向剪切干涉波前重建算法和不同倍数下重建精度的研究

提出一种新的基于循环式径向剪切干涉术的波前重建算法 ,以此模拟计算了不同放大倍数下波前的还原结果与还原精度 ,得出不同放大倍数下采用本算法都能还原出原始波前且还原精度相差不大的结论。同时在基于伽利略望远系统的循环式径向剪切干涉仪上测量了激光系统输出中存在台阶结构的畸变波前 ,得出了与此基本一致的结论。

Algorithm and Accuracy Study of Wavefront Reconstruction with Different Amplification ratio Based On the Cyclic Radial Shearing Interferometer

A new algorithm of wavefront reconstruction based on the cyclic radial shearing interferomerter is given This is a technique that the actual wavefront can be reconstructed directly and accurately from the distribution of phase difference which is obtained from the radial shearing pattern by Fourier transform profilometry. By the numerical calculation and experiments, it is concluded that the new algorithm is credible and the accuracy of wavefront reconstruction with different amplification ratio is basically same based on this interferometer. It shows that this algorithm can be used to reconstruct accurately the distorted wavefront of ICF. A example of test of step structure is presented with different amplification ratio with He Ne laser.