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Proceedings Paper

Diagnostics of seawater turbulence by small-angle light scattering
Author(s): Yurij I. Kopilevich; N. V. Aleksejev; B. V. Kurasov; Viktor A. Yakovlev
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Paper Abstract

Results are presented of a series of investigations carried out at the Department of Hydrooptics of SOI with the aim of development, design, and practical employment of optical instruments for measuring the statistical characteristics of turbulent inhomogeneities in seawater. The developed modifications of phase-contrast methods (shadow methods) make it possible to detect the variations of light beam angle-of-arrival at the level of 0.03' - 0.05'. The interpretation of registered signals from photo-electrical output of the optical instrument is based on the connection between the signal correlation function or spectrum and the energetic spectrum of refractive index fluctuations. The corresponded relations are obtained with the help of the theory of light propagation in random media. A measurement of optical fluctuations spectrum in turbulent flow behind a heated grating in hydrodynamic tube is shown to demonstrate the designed instrument's abilities. Some results of in-situ experiments made in calm waters and in turbulized layer near thermocline are presented.

Paper Details

Date Published: 26 October 1994
PDF: 9 pages
Proc. SPIE 2258, Ocean Optics XII, (26 October 1994); doi: 10.1117/12.190052
Show Author Affiliations
Yurij I. Kopilevich, S.I. Vavilov State Optical Institute (Russia)
N. V. Aleksejev, S.I. Vavilov State Optical Institute (Russia)
B. V. Kurasov, S.I. Vavilov State Optical Institute (Russia)
Viktor A. Yakovlev, S.I. Vavilov State Optical Institute (Russia)


Published in SPIE Proceedings Vol. 2258:
Ocean Optics XII
Jules S. Jaffe, Editor(s)

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