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15 July 2008 End-to-end simulation of AO-assisted coronagraphic differential imaging: estimation of performance for SPHERE
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Abstract
SPHERE (Spectro Polarimetric High contrast Exoplanet REsearch), the planet finder instrument for the VLT is designed to study relatively bright extrasolar giant planets around young or nearby stars. SPHERE is a set of three instruments fed by the same AO-system, two of them share the same coronagraph. This complex system has been modeled with Fourier Optics to investigate the performance of the whole instrument. In turns, this end-to-end model was useful to analyze the sensitivity to various parameters (WFE, alignment of the coronagraph, differential aberrations) and to put some specifications on the sub-systems. This paper presents some example of sensitivity analysis and some contrast performance of the instruments as a function of the flux for the main observing mode of SPHERE: the Dual Band Imaging (DBI), equivalent to the Spectral Differential Imaging technique.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Anthony Boccaletti, Marcel Carbillet, Thierry Fusco, David Mouillet, Maud Langlois, Claire Moutou, and Kjetil Dohlen "End-to-end simulation of AO-assisted coronagraphic differential imaging: estimation of performance for SPHERE", Proc. SPIE 7015, Adaptive Optics Systems, 70156E (15 July 2008); https://doi.org/10.1117/12.789349
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