Beyond Fresnel’s approximation: Luneburg’s kernel to simulate the interferometric images of droplets or irregular rough particles

Marc Brunel (1) , Emmanuel Porcheron (2) , Pascal Lemaitre (2) , Jeroen van Beeck , Rosaria Vetrano , Gérard Gréhan , Sébastien Coëtmellec

1 CORIA - Complexe de recherche interprofessionnel en aérothermochimie
2 IRSN/PSN-RES/SCA/LPMA - Laboratoire de physique et de métrologie des aérosols

Interferometric particle imaging is generally interpreted in the framework of Fresnel conditions. We develop here a new formalism based on Luneburg’s kernel. It enables to predict the interferometric images of droplets or rough particles when Fresnel conditions are not respected. It is compared to previous experimental results, and then used to understand possible sources of noise when analyzing interferometric particle images.

Keywords: Interferometric particle imaging; Luneburg integral; Fresnel conditions

Domains: Engineering Sciences [physics]

Marc Brunel, Emmanuel Porcheron, Pascal Lemaitre, Jeroen van Beeck, Rosaria Vetrano, et al.. Beyond Fresnel’s approximation: Luneburg’s kernel to simulate the interferometric images of droplets or irregular rough particles. Optics Communications, 2022, 520, pp.128490. ⟨10.1016/j.optcom.2022.128490⟩. ⟨hal-03971178⟩