title: Interferometric evaluation of angular displacements using phase retrieval.
abstract: Phase retrieval is carried out using sequential intensity measurements of a volume speckle field and a wave propagation equation. Retrieved phases and phase subtraction facilitate the analysis of wavefronts before and after undergoing a small rotation. Angular displacement between incident planar wavefronts is determined from the unwrapped phase difference, phase diffuser aperture diameter, and the light source wavelength. Numerical simulations confirm the experimental results.
authors.affiliation: DTU-Fotonik, Department of Photonics Engineering, Danish Technical University, Roskilde, Denmark. percival.almoro@risoe.dk
authors.forename: Percival F
authors.initials: PF
authors.lastname: Almoro
authors.forename: Giancarlo
authors.initials: G
authors.lastname: Pedrini
authors.forename: Arun
authors.initials: A
authors.lastname: Anand
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Osten
authors.forename: Steen G
authors.initials: SG
authors.lastname: Hanson