Application of the two-dimensional fractional-order Fourier transformation to particle field digital holography.
We demonstrate that the fractional-order Fourier transformation is a suitable method to analyze the diffraction patterns of particle field holograms. This method permits reconstruction of in-line digital holograms beyond the Fraunhofer condition (d2/lambdaz approximately/= 10). We show that the diameter of spherical particles is measured with good accuracy. Simulation and experimental results are presented.
Coëtmellec
Sébastien
S
Unité Mixte de Recherche 6614, Complexe de Recherche Interprofessionnel en Aérothermochime, Groupe d'Optique et Optronique, Technopĵle du Madrillet, Saint Etienne du Rouvray, France. coetmellec@coria.fr
Lebrun
Denis
D
Ozkul
Cafer
C