Focal-plane-assisted pyramid wavefront sensor: Enabling frame-by-frame optical gain tracking - ONERA - Office national d'études et de recherches aérospatiales Accéder directement au contenu
Article Dans Une Revue Astronomy and Astrophysics - A&A Année : 2021

Focal-plane-assisted pyramid wavefront sensor: Enabling frame-by-frame optical gain tracking

Résumé

Aims. With its high sensitivity, the pyramid wavefront sensor (PyWFS) is becoming an advantageous sensor for astronomical adaptive optics (AO) systems. However, this sensor exhibits significant non-linear behaviours leading to challenging AO control issues. Methods. In order to mitigate these effects, we propose to use in addition to the classical pyramid sensor a focal plane image combined with a convolutive description of the sensor to fast track the PyWFS non-linearities, the so-called optical gains (OG). Results. We show that this additional focal plane imaging path only requires a small fraction of the total flux while representing a robust solution to estimating the PyWFS OG. Finally, we demonstrate the gain that our method brings with specific examples of bootstrapping and handling non-common path aberrations.
Fichier principal
Vignette du fichier
aa40354-21.pdf (8.97 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-03256256 , version 1 (10-06-2021)

Licence

Paternité

Identifiants

Citer

Vincent Chambouleyron, Olivier Fauvarque, Jean-François Sauvage, Benoît Neichel, Thierry Fusco. Focal-plane-assisted pyramid wavefront sensor: Enabling frame-by-frame optical gain tracking. Astronomy and Astrophysics - A&A, 2021, 649, pp.A70. ⟨10.1051/0004-6361/202140354⟩. ⟨hal-03256256⟩
52 Consultations
16 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More