Open AccessTwo-dimensional wavefront reconstruction from lateral multi-shear interferograms
Author(s) -
Yang Guo,
Hao Chen,
Xu Ji,
Jianping Ding
Publication year - 2012
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.015723
Subject(s) - shearing interferometer , interferometry , optics , shearing (physics) , wavefront , shear (geology) , shearography , fourier transform , interference (communication) , physics , materials science , astronomical interferometer , computer science , computer network , channel (broadcasting) , quantum mechanics , composite material , thermodynamics
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.