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Two-dimensional wavefront reconstruction from lateral multi-shear interferograms
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DOI：10.1364/OE.20.015723.png)
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Abstract
En 中文
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. (C) 2012 Optical Society of America
Keywords:
DISCRETE FOURIER-TRANSFORM
INTERFEROMETRY
POLYNOMIALS
DERIVATIVES
ALGORITHM
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