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In this article, we present a simulator conceived for the conceptual study ofan AO-fed high-contrast coronagraphic imager. The simulator implements physicaloptics: a complex disturbance (the electric field) is Fresnel-propagatedthrough any user-defined optical train, in an end-to-end fashion. The effect ofatmospheric residual aberrations and their evolution with time can bereproduced by introducing in input a temporal sequence of phase screens:synthetic images are then generated by co-adding instantaneous PSFs. Thisallows studying with high accuracy the impact of AO correction on image qualityfor different integration times and observing conditions. In addition, byconveniently detailing the optical model, the user can easily implement anycoronagraphic set-up and introduce optical aberrations at any position.Furthermore, generating multiple images can allow exploring detection limitsafter a differential post-processing algorithm is applied (e.g. AngularDifferential Imaging). The simulator has been developed in the framework of thedesign of SHARK-NIR, the second-generation high contrast imager selected forthe Large Binocular Telescope.

A virtual coronagraphic test bench for SHARK-NIR, the second-generation high contrast imager for the Large Binocular Telescope