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On the morphology of irregular rough particles from the analysis of speckle-like interferometric out-of-focus images

Marc Brunel 1 Sara González Ruiz 2 Justin Jacquot 1 Jeroen van Beeck 2
1 CORIA - Complexe de recherche interprofessionnel en aérothermochimie
2 VKI - von Karman Institute for Fluid Dynamics
Abstract : Using a simplified description, we show that the Fourier transform of the speckle-like out-of-focus image of an irregular rough particle is given by the 2 dimensional-autocorrelation of the shape of the particle. Experiments confirm well this result. Using a matrix transfer based-formulation, we further determine the exact scaling factors between both functions, whatever the imaging system is.
Keywords : Interferometric out-of focus imaging Optical transfer matrices Rough objects Morphology
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https://hal-normandie-univ.archives-ouvertes.fr/hal-02112737
Contributor : Marc Brunel <>
Submitted on : Friday, April 26, 2019 - 9:43:13 PM
Last modification on : Wednesday, April 22, 2020 - 1:12:21 AM

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COMUE-NORMANDIE | CNRS | CORIA | INSA-ROUEN | UNIROUEN | INSA-GROUPE

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Marc Brunel, Sara González Ruiz, Justin Jacquot, Jeroen van Beeck. On the morphology of irregular rough particles from the analysis of speckle-like interferometric out-of-focus images. Optics Communications, Elsevier, 2015, 338, pp.193-198. ⟨10.1016/j.optcom.2014.10.053⟩. ⟨hal-02112737⟩

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