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Proceedings Paper

The adaptive secondary mirrors for the Large Binocular Telescope: a progress report
Author(s): Armando Riccardi; Guido Brusa; Marco Xompero; Daniela Zanotti; Ciro Del Vecchio; Piero Salinari; Piero Ranfagni; Daniele Gallieni; Roberto Biasi; Mario Andrighettoni; Steve Miller; Paolo Mantegazza
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Paper Abstract

The two 911mm-diameter adaptive secondary (AS) mirrors for the Large Binocular telescope (LBT) are currently under manufacturing process. Each unit has 672 electro-magnetic force actuators. They control the figure of the Gregorian secondary 1.6mm-thick mirrors with an internal loop using the signal of co-located capacitive sensors. The obtained computational power of the on-board control electronics allows to use it as real-time computer for wavefront reconstruction. We present the progress in manufacturing and assembling of the first telescope unit, the progress in software production, the status of the testing facilities and an update on the latest modification of the design.

Paper Details

Date Published: 25 October 2004
PDF: 8 pages
Proc. SPIE 5490, Advancements in Adaptive Optics, (25 October 2004); doi: 10.1117/12.551578
Show Author Affiliations
Armando Riccardi, INAF, Osservatorio Astrofisico di Arcetri (Italy)
Guido Brusa, Steward Observatory/Univ. of Arizona (United States)
Marco Xompero, INAF, Osservatorio Astrofisico di Arcetri (Italy)
Daniela Zanotti, INAF, Osservatorio Astrofisico di Arcetri (Italy)
Ciro Del Vecchio, INAF, Osservatorio Astrofisico di Arcetri (Italy)
Piero Salinari, INAF, Osservatorio Astrofisico di Arcetri (Italy)
Piero Ranfagni, INAF, Osservatorio Astrofisico di Arcetri (Italy)
Daniele Gallieni, ADS International Srl (Italy)
Roberto Biasi, MICROGATE Srl (Italy)
Mario Andrighettoni, MICROGATE Srl (Italy)
Steve Miller, Steward Observatory/Univ. of Arizona (United States)
Paolo Mantegazza, Politecnico di Milano (Italy)


Published in SPIE Proceedings Vol. 5490:
Advancements in Adaptive Optics
Domenico Bonaccini Calia; Brent L. Ellerbroek; Roberto Ragazzoni, Editor(s)

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