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Proceedings Paper

Primary adaptive mirrors for ELTs: a report on preliminary studies
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Paper Abstract

At the moment the best bet to obtain an extremely high actuator density for extremely large pupils seems to be that of extending the current adaptive secondary mirror technology to segmented "adaptive primaries." The main components of a segment of an adaptive primary mirror are beng studied in order to determine all the parameters able to statically keep the mechanical response within the optical specifications and to dynamically provide the stiffness and damping features needed by the adaptive optics control system. Both static and dynamical requirements depend critically on actuator geometry and structure, mirror shape and thickness, and implementation of the control system. The mechanical response has been numerically evaluated in terms of deformation under gravity, mirror influence functions and actuator layout, including their interface to the shell.

Paper Details

Date Published: 7 July 2004
PDF: 11 pages
Proc. SPIE 5382, Second Backaskog Workshop on Extremely Large Telescopes, (7 July 2004); doi: 10.1117/12.566264
Show Author Affiliations
Armando Riccardi, INAF-Osservatorio Astrofisico di Arcetri (Italy)
Ciro Del Vecchio, INAF-Osservatorio Astrofisico di Arcetri (Italy)
Piero Salinari, INAF-Osservatorio Astrofisico di Arcetri (Italy)
Guido Brusa, INAF-Osservatorio Astrofisico di Arcetri (Italy)
Steward Observatory/Univ. of Arizona (United States)
Olivier Lardiere, INAF-Osservatorio Astrofisico di Arcetri (Italy)
Daniele Gallieni, ADS International Srl (Italy)
Roberto Biasi, Microgate Srl (Italy)
Paolo Mantegazza, Politecnico di Milano (Italy)

Published in SPIE Proceedings Vol. 5382:
Second Backaskog Workshop on Extremely Large Telescopes
Arne L. Ardeberg; Torben Andersen, Editor(s)

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