Open AccessTwo-dimensional wave-front reconstruction from lateral shearing interferograms
Author(s) -
Peiying Liang,
Jianping Ding,
Jin Zhou,
Chen Guo,
HuiTian Wang
Publication year - 2006
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.14.000625
Subject(s) - shearing interferometer , optics , shearing (physics) , interferometry , wavefront , fourier transform , fast fourier transform , short time fourier transform , shearography , fourier analysis , physics , astronomical interferometer , algorithm , computer science , quantum mechanics , thermodynamics
An algorithm is proposed to reconstruct two-dimensional wave-front from phase differences measured by lateral shearing interferometer. Two one-dimensional phase profiles of object wave-front are computed using Fourier transform from phase differences, and then the two-dimensional wave-front distribution is retrieved by use of least-square fitting. The algorithm allows large shear amount and works fast based on fast Fourier transform. Investigations into reconstruction accuracy and reliability are carried out by numerical experiments, in which effects of different shear amounts and noises on reconstruction accuracy are evaluated. Optical measurement is made in a lateral shearing interferometer based on double-grating.