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Proceedings Paper

Application of digital holography in the calculation of displacements
Author(s): J. L. Valin; Edison Goncalves; Fernando F. Palacios; J. R. Perez
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Paper Abstract

Digital Holography is applied to make micro-displacements determination of a steel bar and an aluminum sheet. The displacement of aluminum sheet is made under immersion conditions in water and air. An experimental installation is presented for digital holograms registration with plane reference beam, using a CCD camera as detector. The "HOLODIG" computing system was developed for digital reconstruction of the image using the direct method, the intensity and phase image and interferograms were obtained. Taking into account the phase interferogram and making the unwrapping, the phase was determined for every point of the study surface. As examples of method application the displacement of a square section steel bar, tested in air, and an aluminum sheet, tested in air and submerged in water, were determined. Experimental values of the displacement obtained agree with the applied ones. In the case of aluminum plate submerged in water, the magnitude of the measured displacement is proportional to water refraction index.

Paper Details

Date Published: 21 October 2004
PDF: 7 pages
Proc. SPIE 5622, 5th Iberoamerican Meeting on Optics and 8th Latin American Meeting on Optics, Lasers, and Their Applications, (21 October 2004); doi: 10.1117/12.591626
Show Author Affiliations
J. L. Valin, Instituto Superior Politecnico Jose Antonio Echeverria (Cuba)
Edison Goncalves, Univ. de Sao Paulo (Brazil)
Fernando F. Palacios, Univ. de Oriente (Cuba)
J. R. Perez, Univ. de Oriente (Cuba)

Published in SPIE Proceedings Vol. 5622:
5th Iberoamerican Meeting on Optics and 8th Latin American Meeting on Optics, Lasers, and Their Applications
Aristides Marcano O.; Jose Luis Paz, Editor(s)

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