Recovery of wavefront from multi-shear interferograms with different tilts.
Recovery of wavefront from multi-shear interferograms with different tilts.
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DOI：
10.1364/oe.22.011407
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发表时间：
2014-05
期刊：
影响因子：
3.8
通讯作者：
Yun-feng Guo;Jianpei Xia;Jianping Ding
中科院分区：
文献类型：
--
作者：
Yun-feng Guo;Jianpei Xia;Jianping Ding
提出了一种改进的多剪切算法，根据不同倾斜的横向剪切干涉图测量的多个相位差来重建二维波前。分析了波前倾斜误差的影响并开发了补偿方法。将无偏估计器添加到相位差的傅立叶系数中以自适应地消除倾斜误差。该算法不受倾斜误差的影响，并且可以准确地恢复被测波前。计算机仿真和光学测试表明，该算法比现有的多重剪切算法具有更高的恢复精度。
An improved multi-shear algorithm is proposed to reconstruct a two-dimensional wavefront from multiple phase differences measured by lateral shearing interferograms with different tilts. The effects of the tilt errors in the wavefront are analyzed and a compensation method is developed. Unbiased estimators are added to Fourier coefficients of the phase differences to eliminate the tilt errors adaptively. The algorithm is immune to the tilt errors and the wavefront under test can be recovered exactly. Computer simulation and optical test demonstrated that the proposed algorithm has higher recovery accuracy than the existing multi-shear algorithms.