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Proceedings Paper

Adaptive secondary P30 prototype: laboratory results
Author(s): Guido Brusa-Zappellini; Armando Riccardi; Sam D. Ragland; Simone Esposito; Ciro Del Vecchio; Luca Fini; Paolo Stefanini; Valdemaro Biliotti; Piero Ranfagni; Piero Salinari; Daniele Gallieni; Roberto Biasi; Paolo Mantegazza; G. Sciocco; G. Noviello; S. Invernizzi
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Paper Abstract

We present the result of electrical and optical measurements performed on a reduced size adaptive secondary prototype named P30. The design of this concave deformable mirror consists of a thin deformable glass shell whose figure is controlled by electromagnetic actuators and capacitive position senors. Static measurements of the mirror optical figure, performed with a commercial interferometer, have provided the calibration of the internal position sensor. Dynamic test were performed to experimentally derive the mechanical response of the mirror to the electromagnetic actuators in order to design the mirror closed loop control law. The test, although performed on a reduced scale, are representative of the complexity and capabilities of the full size mirror. In fact, all the key-elements of the full size mirror, i.e. central supporting membrane, actuator spacing closed loop control of the device, have been implemented on the prototype.

Paper Details

Date Published: 11 September 1998
PDF: 12 pages
Proc. SPIE 3353, Adaptive Optical System Technologies, (11 September 1998); doi: 10.1117/12.321693
Show Author Affiliations
Guido Brusa-Zappellini, Osservatorio Astrofisico di Arcetri (United States)
Armando Riccardi, Osservatorio Astrofisico di Arcetri (Italy)
Sam D. Ragland, Osservatorio Astrofisico di Arcetri (France)
Simone Esposito, Osservatorio Astrofisico di Arcetri (Italy)
Ciro Del Vecchio, Osservatorio Astrofisico di Arcetri (Italy)
Luca Fini, Osservatorio Astrofisico di Arcetri (Italy)
Paolo Stefanini, Osservatorio Astrofisico di Arcetri (Italy)
Valdemaro Biliotti, Osservatorio Astrofisico di Arcetri (Italy)
Piero Ranfagni, Osservatorio Astrofisico di Arcetri (Italy)
Piero Salinari, Osservatorio Astrofisico di Arcetri (Italy)
Daniele Gallieni, Media Lario S.r.l. (Italy)
Roberto Biasi, MicroGate S.r.l. (Italy)
Paolo Mantegazza, Politecnico di Milano (Italy)
G. Sciocco, Politecnico di Milano (Italy)
G. Noviello, Politecnico di Milano (Italy)
S. Invernizzi, Politecnico di Milano (Italy)

Published in SPIE Proceedings Vol. 3353:
Adaptive Optical System Technologies
Domenico Bonaccini; Robert K. Tyson, Editor(s)

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