Journal
OPTICS EXPRESS
Volume 20, Issue 14, Pages 15723-15733Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.20.015723
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Funding
- National Natural Science Foundation of China [11074116, 10934003, 10874078]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20090091110012]
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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
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