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Proceedings Paper

3D mapping of turbulence: theory
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Paper Abstract

In this paper we study a multi-conjugate adaptive optics system which has 4 laser guide stars and 2 deformable mirrors. An interaction matrix describing the whole system is computed, and its eigenmodes are analyzed. The implication of the inability to measure tilt from the artificial guide stars are investigated. We show that a single natural guide star anywhere in the corrected FOV is sufficient to correct the singular modes, provided 5 modes are measured from that guide star. These modes are tilts, defocus and astigmatisms. The performance of this AO system are estimated, taking into account only fitting, aliasing and matrix inversion errors. It is shown that good correction performances are obtained in the visible, with an 8 m class telescope.

Paper Details

Date Published: 7 July 2000
PDF: 8 pages
Proc. SPIE 4007, Adaptive Optical Systems Technology, (7 July 2000); doi: 10.1117/12.390329
Show Author Affiliations
Miska Le Louarn, Ctr. de Recherche Astronomique de Lyon (France) and European Southern (Germany)
Michel Tallon, Ctr. de Recherche Astronomique de Lyon (France)

Published in SPIE Proceedings Vol. 4007:
Adaptive Optical Systems Technology
Peter L. Wizinowich, Editor(s)

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