Chinese Optics Letters, 2021, 19 (5): 052601, Published Online: Feb. 25, 2021
Optimizing illumination’s complex coherence state for overcoming Rayleigh’s resolution limit
Abstract
We suggest tailoring of the illumination’s complex degree of coherence for imaging specific two- and three-point objects with resolution far exceeding the Rayleigh limit. We first derive a formula for the image intensity via the pseudo-mode decomposition and the fast Fourier transform valid for any partially coherent illumination (Schell-like, non-uniformly correlated, twisted) and then show how it can be used for numerical image manipulations. Further, for Schell-model sources, we show the improvement of the two- and three-point resolution to 20% and 40% of the classic Rayleigh distance, respectively.
Chunhao Liang, Yashar E. Monfared, Xin Liu, Baoxin Qi, Fei Wang, Olga Korotkova, Yangjian Cai. Optimizing illumination’s complex coherence state for overcoming Rayleigh’s resolution limit[J]. Chinese Optics Letters, 2021, 19(5): 052601.