Large DM AO systems: synthetic IM or calibration on sky?

S. Oberti; Fernando Quirós-Pacheco; S. Esposito; R. Muradore; R. Arsenault; E. Fedrigo; M. Kasper; J. Kolb; E. Marchetti; A. Riccardi; C. Soenke; S. Stroebele

doi:10.1117/12.671709

28 June 2006 Large DM AO systems: synthetic IM or calibration on sky?

S. Oberti, Fernando Quirós-Pacheco, S. Esposito, R. Muradore, R. Arsenault, E. Fedrigo, M. Kasper, J. Kolb, E. Marchetti, A. Riccardi, C. Soenke, S. Stroebele

Author Affiliations +

Proceedings Volume 6272, Advances in Adaptive Optics II; 627220 (2006) https://doi.org/10.1117/12.671709
Event: SPIE Astronomical Telescopes + Instrumentation, 2006, Orlando, Florida , United States

Abstract

Several designs of future Adaptive Optics (AO) systems propose to use a large Deformable Mirror (DM), regarding the size as well as the number of actuators. Most of the time, there is no focal plane upstream the DM. Therefore, the classical way of calibrating the interaction matrix on an artificial source cannot be applied. Furthermore, the requirements in terms of calibration error budget are tight and the high order modes of such DMs are stiff and hence they achieve only a small stroke. This is why novel ways to determine the system Interaction Matrix (IM) have to be investigated. Several paths have been studied. One solution would be to simulate a synthetic IM. However, calibration on sky is also an option. Different techniques were simulated, tested and optimized on real AO systems. The results are presented in this paper.

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S. Oberti, Fernando Quirós-Pacheco, S. Esposito, R. Muradore, R. Arsenault, E. Fedrigo, M. Kasper, J. Kolb, E. Marchetti, A. Riccardi, C. Soenke, and S. Stroebele "Large DM AO systems: synthetic IM or calibration on sky?", Proc. SPIE 6272, Advances in Adaptive Optics II, 627220 (28 June 2006); https://doi.org/10.1117/12.671709

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