Estimation of displacement derivatives in digital holographic interferometry using a two-dimensional space-frequency distribution

The paper introduces a two-dimensional space-frequency distribution based method to directly obtain the unwrapped estimate of the phase derivative which corresponds to strain in digital holographic interferometry. In the proposed method, a two-dimensional pseudo Wigner-Ville distribution of the reconstructed interference field is evaluated and the peak of the distribution provides information about the phase derivative. The presence of a two-dimensional window provides high robustness against noise and enables simultaneous measurement of phase derivatives along both spatial directions. Simulation and experimental results are presented to demonstrate the method’s applicability for phase derivative estimation.


Published in:
Optics Express, 18, 17, 18041-18046
Year:
2010
Publisher:
Optical Society of America
ISSN:
1094-4087
Keywords:
Laboratories:


Note: The status of this file is: EPFL only


 Record created 2010-08-09, last modified 2018-03-17

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