Guo Yun-feng, Chen Hao, Xu Ji, Ding Jianping
Nanjing National Laboratory of Microstructures and School of Physics, Nanjing University, Nanjing 210093, China.
Opt Express. 2012 Jul 2;20(14):15723-33. doi: 10.1364/OE.20.015723.
We propose and demonstrate multiple shearing interferometry for measuring two-dimensional phase object. Multi-shear interference can effectively eliminate the problem of spectral leakage that results from the single-shear interference. The Fourier coefficients of a two-dimensional wavefront are computed from phase differences obtained from multiple shearing interferograms, which are acquired by a shearing interferometer, and the desired phase is then reconstructed. Numerical and optical tests have confirmed that the multiple shearing interferometry has a higher recovery accuracy than single-shear interferometry and the reconstruction precision increases as the number of shear steps increases.
我们提出并演示了用于测量二维相位物体的多重剪切干涉测量法。多重剪切干涉可有效消除单剪切干涉导致的频谱泄漏问题。二维波前的傅里叶系数由通过剪切干涉仪获取的多重剪切干涉图得到的相位差计算得出，然后重建所需相位。数值和光学测试已证实，多重剪切干涉测量法比单剪切干涉测量法具有更高的恢复精度，并且重建精度随着剪切步数的增加而提高。
