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Measurement of in-plane and out-of-plane displacements and strains using digital holographic moire

Kulkarni, Rishikesh and Gorthi, Sai Siva and Rastogi, Pramod (2014) Measurement of in-plane and out-of-plane displacements and strains using digital holographic moire. In: JOURNAL OF MODERN OPTICS, 61 (9). pp. 755-762.

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Official URL: http://dx.doi.org/10.1080/09500340.2014.911982

Abstract

The paper proposes a non-destructive method for simultaneous measurement of in-plane and out-of-plane displacements and strains undergone by a deformed specimen from a single moire fringe pattern obtained on the specimen in a dual beam digital holographic interferometry setup. The moire fringe pattern encodes multiple interference phases which carry the information on multidimensional deformation. The interference field is segmented in each column and is modeled as multicomponent quadratic/cubic frequency-modulated signal in each segment. Subsequently, the product form of modified cubic phase function is used for accurate estimation of phase parameters. The estimated phase parameters are further utilized for direct estimation of the unwrapped interference phases and phase derivatives. The simulation and experimental results are provided to validate the effectiveness of the proposed method.

Item Type: Journal Article
Additional Information: copyright for this article belongs to TAYLOR & FRANCIS LTD, ENGLAND
Keywords: modified cubic phase function; multicomponent signal; in-plane and out-of-plane displacements and strains; interferometry; digital holographic moire
Department/Centre: Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Depositing User: Id for Latest eprints
Date Deposited: 13 Jun 2014 07:41
Last Modified: 13 Jun 2014 07:41
URI: http://eprints.iisc.ac.in/id/eprint/49245

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