Reconstruction of purely absorbing, absorbing and phase-shifting, and strong phase-shifting objects from their single-shot in-line holograms

摘要

We address the problem of reconstructing phase-shifting objects from theirsingle shot in-line holograms. We show that a phase-shifting object cannot bereliably recovered from its in-line hologram by non-iterative reconstructionroutines, and that an iterative reconstruction should be applied. Wedemonstrate examples of simulated in-line holograms of objects with thefollowing properties: purely absorbing, both absorbing and phase shifting, andstrong phase-shifting. We investigate the effects of noise and interferencecontrast in holograms on the reconstruction results and discuss details of anoptimal iterative procedure to quantitatively recover the correct absorbing andphase-shifting properties of the object. We also review previously publishedreconstructions of experimental holograms and summarize the optimal parametersfor retrieval of phase-shifting objects from their in-line holograms.