Model-based wavefront reconstruction for the pyramid sensor tested on the LOOPS bench

Victoria Hutterer (1) , Pierre Janin-Potiron (2, 3) , Iuliia Shatokhina (4) , Olivier Fauvarque (3) , Andreas Obereder (4) , Stefan Raffetseder (4) , Vincent Chambouleyron (2, 3) , Carlos Correia (3) , Thierry Fusco (3, 2) , Benoit Neichel (3) , Kacem El-Hadi (3) , Charlotte Bond (5)

1 JKU - University of Linz - Johannes Kepler Universität Linz
2 DOTA, ONERA, Université Paris Saclay (COmUE) [Châtillon]
3 LAM - Laboratoire d'Astrophysique de Marseille
4 RICAM - Johann Radon Institute for Computational and Applied Mathematics
5 UHM - University of Hawai‘i [Mānoa]

Model-based matrix-free wavefront reconstruction algorithms have proven to provide highly accurate results for both Shack-Hartmann and pyramid wavefront sensors in various simulation environments (OCTOPUS, YAO, COMPASS, OOMAO). Previously, test bench as well as on-sky tests were performed with the CuReD for the Shack-Hartmann sensor providing a convincing performance level together with highly reduced computational efforts. The P-CuReD is a method with linear complexity for wavefront reconstruction from pyramid sensor data which employs the CuReD algorithm and a data preprocessing step converting pyramid signals into Shack-Hartmann-like data. Here we present experimental results for the pyramid sensor being controlled with the P-CuReD on the LOOPS test bench of the Laboratoire d'Astrophysique de Marseille. Through the example of the P-CuReD a comparison of control using matrix-free Fourier domain based methods to standard interaction-matrix-based approaches is provided.

Mots clés: pyramid wavefront sensor; wavefront reconstruction; model-based algorithms; test bench

Domaines: Sciences de l'ingénieur [physics]; Physique [physics]

Victoria Hutterer, Pierre Janin-Potiron, Iuliia Shatokhina, Olivier Fauvarque, Andreas Obereder, et al.. Model-based wavefront reconstruction for the pyramid sensor tested on the LOOPS bench. 6th International Conference on Adaptive Optics for Extremely Large Telescopes, AO4ELT 2019, Jun 2019, Quebec City, Canada. ⟨hal-02639502⟩