波前重建是自适应光学系统中的一个重要环节,对系统性能影响明显.研究了一种无参考输入光条件下,基于Shack-Hartmann波前传感器的自适应波前重建算法,能根据实际光斑图的特点,自动确定探测窗口,计算实际质心、参考质心,选择重建区域和获取入射波前的Zernike模式系数,讨论了参考质心选择对波前重建结果的影响.搭建自适应光学系统,通过测量和校正模拟大气像差对重建算法进行了验证.实验结果表明,基于该重建算法的自适应光学系统可以把大气扰动引起的波前像差校正到0.1λ以下,获得接近衍射极限的成像质量,说明该重建算法具有可靠性与实用性.
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