Diagnostics of seawater turbulence by small-angle light scattering

Yurij I. Kopilevich; N. V. Aleksejev; B. V. Kurasov; Viktor A. Yakovlev

doi:10.1117/12.190052

26 October 1994 Diagnostics of seawater turbulence by small-angle light scattering

Yurij I. Kopilevich, N. V. Aleksejev, B. V. Kurasov, Viktor A. Yakovlev

Proceedings Volume 2258, Ocean Optics XII; (1994) https://doi.org/10.1117/12.190052
Event: Ocean Optics XII, 1994, Bergen, Norway

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.

Citation Download Citation

Yurij I. Kopilevich, N. V. Aleksejev, B. V. Kurasov, and Viktor A. Yakovlev "Diagnostics of seawater turbulence by small-angle light scattering", Proc. SPIE 2258, Ocean Optics XII, (26 October 1994); https://doi.org/10.1117/12.190052

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