Iterative Algorithms for Ptychographic Phase Retrieval
  Ptychography promises diffraction limited resolution without the need for high resolution lenses. To achieve high resolution one has to solve the phase problem for many partially overlapping frames. Here we review some of the existing methods for solving ptychographic phase retrieval problem from a numerical analysis point of view, and propose alternative methods based on numerical optimization. 
C. Yang, J. Qian, A. Schirotzek, F. Maia, S. Marchesini
physics.optics math.OC physics.data-an