title: Rotating point spread function via pupil-phase engineering.
abstract: A simple approach based on the use of a properly designed pupil-phase profile can yield a 3D point-spread function (PSF) that rotates with changing defocus, while keeping its transverse shape approximately invariant over ±3-4 waves of defocus. Unlike Gauss-Laguerre mode-based approaches, it generalizes readily for encoding spherical aberration too via PSF rotation.
authors: Department of Physics and Astronomy, University of New Mexico, Albuquerque, New Mexico 87131, USA. sprasad@unm.edu
authors: Sudhakar
authors: S
authors: Prasad