1. Introduction . Ptychography is a powerful coherent diffractive imaging technique, yielding label-free, high-contrast quantitative amplitude and phase images, without the need for prior information (e.g., support) on the object and probe beam [ 1 , 2 ]. In a conventional ptychographic microscope, a complex-valued object is scanned in a stepwise fashion through a localized beam. In each step, the intensity diffraction pattern from the illuminated region on the object is measured on a F...