Accuracy preserving methods for faster measurements with dynamic light scattering and diffusing wave spectroscopy

P. Zakharov; F. Cardinaux; F. Scheffold

doi:10.1117/12.695260

7 July 2006 Accuracy preserving methods for faster measurements with dynamic light scattering and diffusing wave spectroscopy

P. Zakharov, F. Cardinaux, F. Scheffold

Author Affiliations +

Proceedings Volume 6164, Saratov Fall Meeting 2005: Coherent Optics of Ordered and Random Media VI; 61640K (2006) https://doi.org/10.1117/12.695260
Event: Saratov Fall Meeting 2005, 2005, Saratov, Russian Federation

Abstract

Dynamic Light Scattering together with Diffusing Wave Spectroscopy are common and well acknowledged techniques to study micro and macro dynamics of a complex media. In the past these methods were successfully applied for the characterization of colloidal particles of different kind, foam, sand, interfacial boundaries, blood cells etc. The shape and decay of auto-correlation function (ACF) of scattered light intensity fluctuations are used to study the type and time scale of scatters dynamics. This is usually done by collecting the light by a point-like detector for a time period much larger than the correlation time. But in case of slow or arrested scatter motion the obtained time-averaged ACF may depend on the detector position (non-ergodicity problem). Special averaging techniques required for this case are presented in the current paper.

Citation Download Citation

P. Zakharov, F. Cardinaux, and F. Scheffold "Accuracy preserving methods for faster measurements with dynamic light scattering and diffusing wave spectroscopy", Proc. SPIE 6164, Saratov Fall Meeting 2005: Coherent Optics of Ordered and Random Media VI, 61640K (7 July 2006); https://doi.org/10.1117/12.695260

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