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Proceedings Paper

3D mapping of turbulence: a laboratory experiment
Author(s): Miska Le Louarn; Christopher Dainty; Carl Paterson; Michel Tallon
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Paper Abstract

In this paper, we present the first experimental results of the 3D mapping method. 3D mapping of turbulence is a method to remove the cone effect with multiple laser guide stars and multiple deformable mirrors. A laboratory experiment was realized to verify the theoretical predictions. The setup consisted of two turbulent phase screens (made with liquid crystal devices) and a Shack-Hartmann wavefront sensor. We describe the interaction matrix involved in reconstructing Zernike commands for multiple deformable mirror from the slope measurements made from laser guide stars. It is shown that mirror commands can indeed be reconstructed with the 3D mapping method. Limiting factors of the method, brought to light by this experiment are discussed.

Paper Details

Date Published: 7 July 2000
PDF: 8 pages
Proc. SPIE 4007, Adaptive Optical Systems Technology, (7 July 2000); doi: 10.1117/12.390367
Show Author Affiliations
Miska Le Louarn, European Southern Observatory (Germany) and Ctr. de Recherche Astronomique de Lyon (Germany)
Christopher Dainty, Imperial College of Science, Technology and Medicine (United Kingdom)
Carl Paterson, Imperial College of Science, Technology and Medicine (United Kingdom)
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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