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Proceedings Paper

Performance and improvement of active optics at the Very Large Telescope
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Paper Abstract

After the installation of the four Unit Telescopes of the VLT in the years 1998 till 2000 more than 1.5 million active optics measurements and corrections have been performed. Since all active optics data are logged together with various environmental parameters (external seeing, temperatures, wind, etc.) extensive statistical studies of the dependence of the optical performance of the telescope on the external parameters can be made. Improvements of the functionality and the performance of the telescopes include the use of a Kalman filter in the Active Optics correction loop and the possibility to adjust actively the plate scale of the telescope.

Paper Details

Date Published: 4 February 2003
PDF: 12 pages
Proc. SPIE 4837, Large Ground-based Telescopes, (4 February 2003); doi: 10.1117/12.461130
Show Author Affiliations
Stephane Guisard, European Southern Observatory (Chile)
Lothar Noethe, European Southern Observatory (Germany)
Jason Spyromilio, European Southern Observatory (Germany)
Francisco Delgado, European Southern Observatory (Chile)

Published in SPIE Proceedings Vol. 4837:
Large Ground-based Telescopes
Jacobus M. Oschmann; Larry M. Stepp, Editor(s)

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