Comparison between a model-based and a conventional pyramid sensor reconstructor.
A model of a non-modulated pyramid wavefront sensor (P-WFS) based on Fourier optics has been presented. Linearizations of the model represented as Jacobian matrices are used to improve the P-WFS phase estimates. It has been shown in simulations that a linear approximation of the P-WFS is sufficient in closed-loop adaptive optics. Also a method to compute model-based synthetic P-WFS command matrices is shown, and its performance is compared to the conventional calibration. It was observed that in poor visibility the new calibration is better than the conventional.
Korkiakoski
Visa
V
European Southern Observatory, Karl-Schwarzschild-Strasse 2, D-85748 Garching b, München, Germany. vkorkiak@eso.org
Vérinaud
Christophe
C
Le Louarn
Miska
M
Conan
Rodolphe
R