Comparison between a model-based and a conventional pyramid sensor reconstructor

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...

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Veröffentlicht in:Applied Optics 2007-08, Vol.46 (24), p.6176-6184
Hauptverfasser: Korkiakoski, Visa, Vérinaud, Christophe, Le Louarn, Miska, Conan, Rodolphe
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container_end_page 6184
container_issue 24
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container_title Applied Optics
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creator Korkiakoski, Visa
Vérinaud, Christophe
Le Louarn, Miska
Conan, Rodolphe
description 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.
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title Comparison between a model-based and a conventional pyramid sensor reconstructor
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