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Proceedings Paper

Optical calibration of capacitive sensors for AO: strategy and preliminary results
Author(s): Runa Briguglio; Marco Xompero; Armando Riccardi; Roberto Biasi; Mario Andrighettoni
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Paper Abstract

LBT contactless, voice-coil actuators working point ranges from 10 to 100 μm, with a typical position noise of a few nm. To fully take advantage of such large working range in AO operations, an absolute calibration of their capacitive sensor is requested. We implemented and tested an optical calibration technique that is based on a fast interferometer detection of a differential piston superimposed to a low order mirror mode. This procedure has been tested in dome environment at the Large Binocular Telescope.

Paper Details

Date Published: 13 September 2012
PDF: 8 pages
Proc. SPIE 8447, Adaptive Optics Systems III, 84474E (13 September 2012); doi: 10.1117/12.926820
Show Author Affiliations
Runa Briguglio, INAF - Osservatorio Astrofisico di Arcetri (Italy)
Marco Xompero, INAF - Osservatorio Astrofisico di Arcetri (Italy)
Armando Riccardi, INAF - Osservatorio Astrofisico di Arcetri (Italy)
Roberto Biasi, MICROGATE srl (Italy)
Mario Andrighettoni, MICROGATE srl (Italy)

Published in SPIE Proceedings Vol. 8447:
Adaptive Optics Systems III
Brent L. Ellerbroek; Enrico Marchetti; Jean-Pierre Véran, Editor(s)

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