The in-line configuration of digital holographic microscopy is the simplest to set up, but it requires numerical reconstructions, in order to retrieve the phase of the wave diffracted by the sample. These reconstructions are based on an image formation model, but the effect of the microscopy system is often neglected. Yet, some parameters, like a wrong magnification, the partial coherence of the illumination, or optical aberrations may lead to bias in the reconstruction. In the framework of inverse problems approaches, we analysed and studied the effects of some of these parameters using simulations and experiments on calibrated spherical objects and a rigorous model (Lorenz-Mie), in order to evaluate the relevance and requirements of model refinements.
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