Fucai Zhang, Isaac Peterson, Joan Vila-Comamala, Ana Diaz, Felisa Berenguer, Richard Bean, Bo Chen, Andreas Menzel, Ian K Robinson, John M Rodenburg，“Translation position determination in ptychographic coherent diffraction imaging”，Optics express 21 (11), 13592-13606（2013）

【原文】

Translation position determination in ptychographic coherent diffraction imaging

ABSTRACT

Accurate knowledge of translation positions is essential in ptychography to achieve a good image quality and the diffraction limited resolution. We propose a method to retrieve and correct position errors during the image reconstruction iterations. Sub-pixel position accuracy after refinement is shown to be achievable within several tens of iterations. Simulation and experimental results for both optical and X-ray wavelengths are given. The method improves both the quality of the retrieved object image and relaxes the position accuracy requirement while acquiring the diffraction patterns.