Simultaneous measurement of in-plane and out-of-plane displacements using pseudo-Wigner-Hough transform

A new method based on pseudo-Wigner-Hough transform is proposed for the simultaneous measurement of the in-plane and out-of-plane displacements using digital holographic moire. Multiple interference phases corresponding to the in-plane and out-of-plane displacement components are retrieved from a single moire fringe pattern. The segmentation of the interference field allows us to approximate it with a multicomponent linear frequency modulated signal. The proposed method accurately and simultaneously estimates all the phase parameters of the signal components without the use of any signal separation techniques. Simulation and experimental results demonstrate the efficacy of the proposed method and its robustness against the variations in object beam intensity. (C) 2014 Optical Society of America


Published in:
Optics Express, 22, 7, 8703-8711
Year:
2014
Publisher:
Washington, Optical Society of America
ISSN:
1094-4087
Laboratories:




 Record created 2014-06-16, last modified 2018-10-01

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