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Optical Engineering

Acquisition of multiple phase derivatives from a single frame in digital holographic interferometry
Author(s): Rishikesh Kulkarni; Pramod Rastogi
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Paper 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.

Paper Details

Date Published: 17 August 2015
PDF: 7 pages
Opt. Eng. 54(8) 084109 doi: 10.1117/1.OE.54.8.084109
Published in: Optical Engineering Volume 54, Issue 8
Show Author Affiliations
Rishikesh Kulkarni, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
Pramod Rastogi, Ecole Polytechnique Fédérale de Lausanne (Switzerland)

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