Joint estimation of object and probes in vectorial ptychography

Arthur Baroni (1) , Marc Allain (1) , Peng Li (1) , Virginie Chamard (1) , Patrick Ferrand (1)

1 COMiX - Coherent Optical Microscopy and X-rays

Vectorial ptychography has been recently introduced to reconstruct the Jones matrix of an anisotropic object by means of series of ptychographic measurements performed using a set of polarized illumination probes in conjugation with various analyzers. So far, the probes were assumed to be completely known (amplitude, wavefront, state of polarization), which is rarely the case in practice. Here we address the issue of the joint estimating of the set of polarized illumination probes together with the Jones matrix of an anisotropic object in vectorial ptychography. We propose an algorithm based on a conjugate gradient strategy. Experimental results are reported, showing an improvement on the object estimate, in addition to a precise reconstruction of the probes.

Keywords: Optical properties; Phase imaging; Phase shift; Ptychography; Reconstruction algorithms; Spatial light modulators

Domains: Engineering Sciences [physics]; Optics / Photonic; Physics [physics]; Condensed Matter [cond-mat]; Materials Science [cond-mat.mtrl-sci]; Engineering Sciences [physics]; Signal and Image processing

Arthur Baroni, Marc Allain, Peng Li, Virginie Chamard, Patrick Ferrand. Joint estimation of object and probes in vectorial ptychography. Optics Express, 2019, 27 (6), pp.8143. ⟨10.1364/OE.27.008143⟩. ⟨hal-02059897⟩