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Proceedings Paper

Deformable mirror models for open-loop adaptive optics using non-parametric estimation techniques
Author(s): Dani Guzmán; Francisco Javier De Cos Juez; Richard Myers; Fernando Sánchez Lasheras; Laura K. Young; Andrés Guesalaga
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Paper Abstract

Open-loop adaptive optics is a technique in which the turbulent wavefront is measured before it hits the deformable mirror for correction; therefore the correct control of the mirror in open-loop is key in achieving the expected level of correction. In this paper, we present non-parametric estimation techniques to model deformable mirrors working in open-loop. We have results with mirrors characterized by non-linear behavior: a Xinetics electrostrictive mirror and a Boston Micromachines MEMS mirror. The inputs for these models are the wavefront corrections to apply to the mirror and the outputs are the set of voltages to shape the mirror. We have performed experiments on both mirrors, achieving Go-To errors relative to peak-to-peak wavefront excursion in the order of 1 % RMS for the Xinetics mirror and 3 % RMS for the Boston mirror . These techniques are trained with interferometric data from the mirror under control; therefore they do not depend on the physical parameters of the device.

Paper Details

Date Published: 28 July 2010
PDF: 8 pages
Proc. SPIE 7736, Adaptive Optics Systems II, 77361C (28 July 2010); doi: 10.1117/12.856894
Show Author Affiliations
Dani Guzmán, Pontificia Univ. Católica (Chile)
Durham Univ. (United Kingdom)
Francisco Javier De Cos Juez, Univ. de Oviedo (Spain)
Richard Myers, Durham Univ. (United Kingdom)
Fernando Sánchez Lasheras, TecniProject S.L. (Spain)
Laura K. Young, Durham Univ. (United Kingdom)
Andrés Guesalaga, Pontificia Univ. Católica (Chile)

Published in SPIE Proceedings Vol. 7736:
Adaptive Optics Systems II
Brent L. Ellerbroek; Michael Hart; Norbert Hubin; Peter L. Wizinowich, Editor(s)

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