title: Comparison between a model-based and a conventional pyramid sensor reconstructor.
abstract: 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.
authors: European Southern Observatory, Karl-Schwarzschild-Strasse 2, D-85748 Garching b, München, Germany. vkorkiak@eso.org
authors: Visa
authors: V
authors: Korkiakoski
authors: Christophe
authors: C
authors: Vérinaud
authors: Miska
authors: M
authors: Le Louarn
authors: Rodolphe
authors: R
authors: Conan