SNR improvement of digital speckle pattern interferograms

F. Garoi; A. Sima; D. Apostol; V. Damian; P. C. Logofătu; V. Nascov; Iuliana Iordache; Ludmila Serghei; Mihaela Bojan

doi:10.1117/12.729657

25 April 2007 SNR improvement of digital speckle pattern interferograms

F. Garoi, A. Sima, D. Apostol, V. Damian, P. C. Logofătu, V. Nascov, Iuliana Iordache, Ludmila Serghei, Mihaela Bojan

Proceedings Volume 6606, Advanced Laser Technologies 2006; 660612 (2007) https://doi.org/10.1117/12.729657
Event: Advanced Laser Technologies 2006, 2006, Brasov, Romania

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.

Citation Download Citation

F. Garoi, A. Sima, D. Apostol, V. Damian, P. C. Logofătu, V. Nascov, Iuliana Iordache, Ludmila Serghei, and Mihaela Bojan "SNR improvement of digital speckle pattern interferograms", Proc. SPIE 6606, Advanced Laser Technologies 2006, 660612 (25 April 2007); https://doi.org/10.1117/12.729657

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