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
RDK_OpticsExpress.pdf
openaccess
1.49 MB
Adobe PDF
6054ba6471d9b6f07acad5ada4f66a3c