Robustness of phase retrieval under partially coherent illumination

Abstract

Conventional phase retrieval methods are laser-based and utilize the intensity recordings from coherently illuminated test objects. The use of highly coherent lasers in phase retrieval, however, limits its range of applications. Compared to lasers, partially coherent light sources are more accessible thus if proved usable for phase retrieval could widen its range of applications. We present a model for generating multiple intensity measurements from test objects under partially coherent illumination. Diffraction patterns from a simulated test object under various cases of partially coherent illumination are investigated to evaluate the intensity variation which is important for a successful phase retrieval. The robustness of the phase retrieval model is demonstrated numerically using the multiple-plane phase retrieval method to reconstruct test object waves.