FN Archimer Export Format
PT J
TI Focal-plane-assisted pyramid wavefront sensor: Enabling frame-by-frame optical gain tracking
BT 
AF Chambouleyron, V.
   Fauvarque, Olivier
   Sauvage, J.-F.
   Neichel, B.
   Fusco, T.
AS 1:2;2:3;3:;4:1;5:1;
FF 1:;2:PDG-REM-RDT-LDCM;3:;4:;5:;
C1 Aix Marseille Univ, CNRS, CNES, LAM, Marseille, France
   DOTA, ONERA, Université Paris Saclay, 91123 Palaiseau, France
   IFREMER, Laboratoire Detection, Capteurs et Mesures (LDCM), Centre Bretagne, ZI de la Pointe du Diable, CS 10070, 29280 Plouzane, France
C2 UNIV AIX MARSEILLE, FRANCE
   UNIV PARIS SACLAY, FRANCE
   IFREMER, FRANCE
SI BREST
SE PDG-REM-RDT-LDCM
IN WOS Ifremer UPR
   copubli-france
   copubli-univ-france
IF 6.24
TC 5
UR https://archimer.ifremer.fr/doc/00696/80781/84117.pdf
   https://archimer.ifremer.fr/doc/00696/80781/86965.pdf
LA English
DT Article
DE ;instrumentation: adaptive optics;telescopes
AB 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. 
PY 2021
PD MAY
SO Astronomy & Astrophysics
SN 0004-6361
PU EDP Sciences
VL 649
UT 000655638100004
DI 10.1051/0004-6361/202140354
ID 80781
ER

EF