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Proceedings Paper

Wavelet analysis of nonstationary speckle patterns
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Paper Abstract

Wavelet analysis of scattered light intensity fluctuations was used to improve performance of speckle correlometry of porous systems. The further development of technique was proposed to study structural characteristics of such systems. The intensity fluctuations of multiple-scattered light is a non-stationary noise-like signal. Previously reported spectral analysis of such signals based on windowed Fourier transformation faces the well-known difficulties in a case of short time series. The effect of aliasing in frequency domain prevent us from determining spectral characteristics accurately. But by use of continuous wavelet analysis it can be defined with maximal time-frequency resolution.

Paper Details

Date Published: 31 May 2002
PDF: 5 pages
Proc. SPIE 4705, Saratov Fall Meeting 2001: Coherent Optics of Ordered and Random Media II, (31 May 2002); doi: 10.1117/12.469012
Show Author Affiliations
Pavel V. Zakharov, Saratov State Univ. (Russia)
Dmitry A. Zimnyakov, Saratov State Univ. (Russia)

Published in SPIE Proceedings Vol. 4705:
Saratov Fall Meeting 2001: Coherent Optics of Ordered and Random Media II
Dmitry A. Zimnyakov, Editor(s)

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