Efficient Algorithms for Ptychographic Phase Retrieval

Source abstract

Ptychography is an emerging non-crystalline diffractive imaging technique that can potentially reach diffraction limited resolution without the need for high resolution lenses. To achieve high resolution one must solve a phase-retrieval inverse problem using the diffraction patterns of many partially overlapping subimage frames. We examine the mathematical formulation of the ptychographic phase retrieval problem, and analyze some of the existing methods for solving the inverse problem. We also discuss a number of practical techniques that can improve the efficiency and robustness of numerical algorithms for solving the ptychographic phase retrieval problem.