22–24 oct. 2018
Paris
Fuseau horaire Europe/Paris

Numerical estimation and modeling of the wavefront error breakdown in adaptive optics

23 oct. 2018, 12:20
20m
Amphithéâtre Turing (Paris)

Amphithéâtre Turing

Paris

Université Paris Diderot Bâtiment Sophie Germain, niveau -1 8 place Aurélie Nemours - 75013 Paris

Orateur

Dr Florian Ferreira (LESIA)

Summary

For ground-based telescopes, Adaptive Optics (AO) systems aim to correct the wavefront disturbances due to atmospheric turbulence.The Point Spread Function (PSF) is one of the metrics of the AO system correction performance when compared to the diffraction limited one. Estimating the AO corrected PSF is important for image inversion which requires accurate estimation of the PSF over the scienti c field. This estimation relies on the knowledge of the AO system error budget. Establishing the various contributions of this error budget is an issue because of the propagation process of errors through the AO loop filtering. We have developed a model for SCAO system residual error breakdown which includes temporal error, anisoplanatism, aliasing, noise and tting terms. Thanks to GPU acceleration, it leads to PSF estimation at ELT scale in half a minute

Auteur principal

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