Publication in Optics Letters

Optimizing illumination for precise multi-parameter estimations in coherent diffractive imaging

Coherent diffractive imaging (CDI) is widely used to characterize structured samples from measurements of diffracting intensity patterns. We introduce a numerical framework to quantify the precision that can be achieved when estimating any given set of parameters characterizing a sparse sample from measured data. To that end, we consider a real-space parametrization of an object composed of three lines. We determine the optimal probe positions for a Gaussian incident field and the optimal design for a zone plate shaping the incident field. These results offer new insights to improve the performance of methods based on sparsity-based CDI when the dose per acquisition may be limited, notably for the characterization of delicate samples or when high throughput is required. 

Optimizing illumination for precise multi-parameter estimations in coherent diffractive imaging
D. Bouchet, J. Seifert and A.P. Mosk, Optics Letters 46 (2), 254-257 (2021). DOI: 10.1364/OL.411339