Limits on rough-particle sizing with low-defocus interferometric imaging

M. Brunel (1) , L. Ouldarbi (1) , H. Shen (1) , G. Gréhan (1) , S. Coetmellec (1)

1 CORIA - Complexe de recherche interprofessionnel en aérothermochimie

We present a rigorous theoretical model for the influence of the aperture in interferometric out-of-focus imaging. We investigate the role of this effect on the properties of speckle-like patterns generated by irregular, rough particles. Finally, we determine the conditions under which these patterns are no longer representative of particle size but of the aperture itself and the defocus parameter. (C) 2014 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.

Domaines: Sciences de l'ingénieur [physics]

M. Brunel, L. Ouldarbi, H. Shen, G. Gréhan, S. Coetmellec. Limits on rough-particle sizing with low-defocus interferometric imaging. Particuology , 2015, 22, pp.52--58. ⟨10.1016/j.partic.2014.07.008⟩. ⟨hal-01612361⟩