title: Two-dimensional wavefront reconstruction from lateral multi-shear interferograms.
abstract: 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.
authors: Nanjing National Laboratory of Microstructures and School of Physics, Nanjing University, Nanjing 210093, China.
authors: Yun-feng
authors: YF
authors: Guo
authors: Hao
authors: H
authors: Chen
authors: Ji
authors: J
authors: Xu
authors: Jianping
authors: J
authors: Ding