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Proceedings Paper

SNR improvement of digital speckle pattern interferograms
Author(s): F. Garoi; A. Sima; D. Apostol; V. Damian; P. C. Logofătu; V. Nascov; Iuliana Iordache; Ludmila Serghei; Mihaela Bojan
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Paper Abstract

In this paper we investigate the vibrations of a square aluminium plate by speckle interferometry means. Modes of vibration of this plate are shown as speckle interferograms. As usually is the case with such interferograms, enhancement and filtering of these images is needed after recording. The speckle index and the signal-to-noise ratio (SNR) of the preprocessed interferograms before and after filtering are calculated. An improvement of the SNR between 1.37 and 1.81 is obtained for the vibration modes presented here.

Paper Details

Date Published: 25 April 2007
PDF: 5 pages
Proc. SPIE 6606, Advanced Laser Technologies 2006, 660612 (25 April 2007); doi: 10.1117/12.729657
Show Author Affiliations
F. Garoi, National Institute for Laser, Plasma and Radiation Physics (Romania)
A. Sima, National Institute for Laser, Plasma and Radiation Physics (Romania)
D. Apostol, National Institute for Laser, Plasma and Radiation Physics (Romania)
V. Damian, National Institute for Laser, Plasma and Radiation Physics (Romania)
P. C. Logofătu, National Institute for Laser, Plasma and Radiation Physics (Romania)
V. Nascov, National Institute for Laser, Plasma and Radiation Physics (Romania)
Iuliana Iordache, National Institute for Laser, Plasma and Radiation Physics (Romania)
Ludmila Serghei, National Institute for Laser, Plasma and Radiation Physics (Romania)
Mihaela Bojan, National Institute for Laser, Plasma and Radiation Physics (Romania)


Published in SPIE Proceedings Vol. 6606:
Advanced Laser Technologies 2006

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