The adaptive secondary mirrors for the Large Binocular Telescope: a progress report

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

doi:10.1117/12.551578

25 October 2004 The adaptive secondary mirrors for the Large Binocular Telescope: a progress report

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

Author Affiliations +

Proceedings Volume 5490, Advancements in Adaptive Optics; (2004) https://doi.org/10.1117/12.551578
Event: SPIE Astronomical Telescopes + Instrumentation, 2004, Glasgow, United Kingdom

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.

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Armando Riccardi, Guido Brusa, Marco Xompero, Daniela Zanotti, Ciro Del Vecchio, Piero Salinari, Piero Ranfagni, Daniele Gallieni, Roberto Biasi, Mario Andrighettoni, Steve Miller, and Paolo Mantegazza "The adaptive secondary mirrors for the Large Binocular Telescope: a progress report", Proc. SPIE 5490, Advancements in Adaptive Optics, (25 October 2004); https://doi.org/10.1117/12.551578

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