Post date: Jun 21, 2010 10:16:42 AM
After a substantial rewritting the paper featuring Echo Speckle Imaging (ESI) technique finally appeared in Soft Materials [link]. The Arxiv preprint can be found here. The technique itself was developed by me and Frank Scheffold in University of Fribourg back in 2006 and since then we've been trying it on different types of scattering media. ESI performes the multispeckle averaging by actively perturbating the illumination field in order to produce multiple speckle field realisations and by this eliminate the problem of non-ergodicity. The paper discussed the imaging of the heterogeneous dynamics during the drying of paint. Paint is a nice model experiment for such technique, since with the progress of drying withdrawal of liquid phase from the paint matrix is not continuous, but driven by the intermittent events, known as 'rheons'. Using ESI we were able to directly visualise these events in the highly scattering matrix of paint. More info can be found on ESI page.