Special Section on Speckle-Based Metrology

Two-dimensional discrete wavelets transform for optical phase extraction: application on speckle correlation fringes

[+] Author Affiliations
Abdulatef Ghlaifan, Yassine Tounsi, Sara Zada, Desire Muhire, Abdelkrim Nassim

Chouaib Doukkali University, Physics Department, Science Faculty, Measurement and Control Instrumentation Laboratory IMC, B.P. 20, El Jadida 24000, Morocco

Opt. Eng. 55(12), 121708 (Jun 28, 2016). doi:10.1117/1.OE.55.12.121708
History: Received April 26, 2016; Accepted June 6, 2016
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Abstract.  A method for optical phase extraction based on two-dimensional discrete wavelets transform (2-DWT) decomposition is shown. From modulated fringe pattern, phase distribution is extracted by the ratio between detail and approximation. Modulation process is realized digitally by introducing high-frequency spatial carrier, and this process needs two π/2-shifted fringe patterns. We propose to use only single fringe and generate its quadrature by spiral phase transform (SPT). After validation by computer simulation, we apply the 2-DWT algorithm on experimental speckle fringe correlation taken for hard disk surface. The extracted phase using SPT quadrature was compared with that given using this time experimental quadrature, and we show a good performance by multiscale structural similarity metric.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Abdulatef Ghlaifan ; Yassine Tounsi ; Sara Zada ; Desire Muhire and Abdelkrim Nassim
"Two-dimensional discrete wavelets transform for optical phase extraction: application on speckle correlation fringes", Opt. Eng. 55(12), 121708 (Jun 28, 2016). ; http://dx.doi.org/10.1117/1.OE.55.12.121708


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