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Opt Lett. 2011 Dec 1;36(23):4644-6. doi: 10.1364/OL.36.004644.

Electronic speckle pattern interferometry using vortex beams.

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  • 1Laboratorio de Instrumentación Espacial–LINES, Instituto Nacional de Técnica Aeroespacial–INTA, Torrejón de Ardoz (Madrid) 28850, Spain. restrepogr@inta.es

Abstract

We show that it is possible to perform electronic speckle pattern interferometry (ESPI) using, for the first time to our knowledge, vortex beams as the reference beam. The technique we propose is easy to implement, and the advantages obtained are, among others, environmental stability, lower processing time, and the possibility to switch between traditional ESPI and spiral ESPI. The experimental results clearly show the advantages of using the proposed technique for deformation studies of complex structures.

© 2011 Optical Society of America

PMID:
22139270
[PubMed]
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