Liang Peiying, Ding Jianping, Jin Zhou, Guo Cheng-Shan, Wang Hui-Tian
Opt Express. 2006 Jan 23;14(2):625-34. doi: 10.1364/opex.14.000625.
An algorithm is proposed to reconstruct two-dimensional wave-front from phase differences measured by lateral shearing interferometer. Two one-dimensional phase profiles of object wave-front are computed using Fourier transform from phase differences, and then the two-dimensional wave-front distribution is retrieved by use of least-square fitting. The algorithm allows large shear amount and works fast based on fast Fourier transform. Investigations into reconstruction accuracy and reliability are carried out by numerical experiments, in which effects of different shear amounts and noises on reconstruction accuracy are evaluated. Optical measurement is made in a lateral shearing interferometer based on double-grating.
提出了一种从横向剪切干涉仪测量的相位差重建二维波前的算法。利用傅里叶变换从相位差计算出物波前的两个一维相位分布，然后通过最小二乘拟合得到二维波前分布。该算法允许较大的剪切量，并基于快速傅里叶变换快速工作。通过数值实验对重建精度和可靠性进行了研究，评估了不同剪切量和噪声对重建精度的影响。在基于双光栅的横向剪切干涉仪中进行了光学测量。
