Instrumentation, Techniques, and Measurement

Acquisition of multiple phase derivatives from a single frame in digital holographic interferometry

[+] Author Affiliations
Rishikesh Kulkarni, Pramod Rastogi

Ecole Polytechnique Fédérale de Lausanne, Department of Civil Engineering, Applied Computing and Mechanics Laboratory, Lausanne 1015, Switzerland

Opt. Eng. 54(8), 084109 (Aug 17, 2015). doi:10.1117/1.OE.54.8.084109
History: Received March 27, 2015; Accepted July 17, 2015
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Abstract.  This paper proposes a technique to extract two-dimensional multiple phase derivatives (strains, slopes, and shearing strains) from a single frame of the interference fringe pattern recorded in an optical setup with multiple illumination beams. In the proposed method, the interference field is modeled as a multicomponent complex sinusoid in an analysis window around each pixel. The frequencies of these sinusoids provide the estimates of the spatially varying phase derivatives. Matrix enhancement and matrix pencil-based technique is utilized to accurately estimate the multiple frequencies. A numerical example is provided to test the performance of the proposed method in the presence of noise. Experimental results are given to substantiate its applicability in the simultaneous estimation of multiple phase derivatives in a multiwave digital holographic interferometry setup.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Rishikesh Kulkarni and Pramod Rastogi
"Acquisition of multiple phase derivatives from a single frame in digital holographic interferometry", Opt. Eng. 54(8), 084109 (Aug 17, 2015). ; http://dx.doi.org/10.1117/1.OE.54.8.084109


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