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

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.

Automated summary

In this study, a new formalism based on Luneburg's kernel is developed for predicting interferometric images of droplets or rough particles when Fresnel conditions are not respected. The formalism is compared to previous experimental results and used to understand potential sources of noise in the analysis of interferometric particle images.