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Proceedings Paper

Laboratory demonstration of a primary active mirror for space with the LATT: large aperture telescope technology
Author(s): Runa Briguglio; Roberto Biasi; Daniele Gallieni; Christian Vettore; Francesco d'Amato; Marco Xompero; Carmelo Arcidiacono; Franco Lisi; Armando Riccardi; Christian Patauner; Paolo Lazzarini; Matteo Tintori; Fabrizio Duò; Mauro Pucci; Alessandro Zuccaro Marchi; Luca Maresi
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Paper Abstract

The LATT project is an ESA contract under TRP programme to demonstrate the scalability of the technology from ground-based adaptive mirrors to space active primary mirrors. A prototype spherical mirror based on a 40 cm diameter 1 mm thin glass shell with 19 contactless, voice-coil actuators and co-located position sensors have been manufactured and integrated into a final unit with an areal density lower than 20 kg/m2. Laboratory tests demonstrated the controllability with very low power budget and the survival of the fragile glass shell exposed to launch accelerations, thanks to an electrostatic locking mechanism; such achievements pushes the technology readiness level toward 5. With this prototype, the LATT project explored the feasibility of using an active and lightweight primary for space telescopes. The concept is attractive for large segmented telescopes, with surface active control to shape and co-phase them once in flight. In this paper we will describe the findings of the technological advances and the results of the environmental and optical tests.

Paper Details

Date Published: 29 July 2016
PDF: 14 pages
Proc. SPIE 9904, Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave, 99046C (29 July 2016); doi: 10.1117/12.2231726
Show Author Affiliations
Runa Briguglio, INAF - Osservatorio Astrofisico di Arcetri (Italy)
Roberto Biasi, Microgate S.r.l. (Italy)
Daniele Gallieni, ADS-International (Italy)
Christian Vettore, OHB CGS (Italy)
Francesco d'Amato, CNR-Istituto Nazionale di Ottica (Italy)
Marco Xompero, INAF - Osservatorio Astrofisico di Arcetri (Italy)
Carmelo Arcidiacono, INAF - Osservatorio Astrofisico di Arcetri (Italy)
Franco Lisi, INAF - Osservatorio Astrofisico di Arcetri (Italy)
Armando Riccardi, INAF - Osservatorio Astrofisico di Arcetri (Italy)
Christian Patauner, Microgate S.r.l. (Italy)
Paolo Lazzarini, A.D.S. International S.r.l. (Italy)
Matteo Tintori, A.D.S. International S.r.l. (Italy)
Fabrizio Duò, OHB CGS (Italy)
Mauro Pucci, CNR-Istituto Nazionale di Ottica (Italy)
Alessandro Zuccaro Marchi, European Space Research and Technology Ctr. (Netherlands)
Luca Maresi, European Space Research and Technology Ctr. (Netherlands)


Published in SPIE Proceedings Vol. 9904:
Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave
Howard A. MacEwen; Giovanni G. Fazio; Makenzie Lystrup; Natalie Batalha; Nicholas Siegler; Edward C. Tong, Editor(s)

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