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Proceedings Paper

Optical calibration and testing of the E-ELT M4 adaptive mirror
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Paper Abstract

Innovative optical interferometry test setups and control software techniques have been proposed for the E-ELT M4 adaptive optics mirror. The system is composed of three sub-systems: a CGH-based optical test tower, delivering a 1.5- m collimated beam, for fast simultaneous acquisition of large areas; a stitching interferometer, to calibrate at higher spatial frequencies, on smaller areas; and an optical piston sensor to remove differential piston and tilt between adjacent mirror segments.

Paper Details

Date Published: 13 September 2012
PDF: 7 pages
Proc. SPIE 8447, Adaptive Optics Systems III, 84473O (13 September 2012); doi: 10.1117/12.926008
Show Author Affiliations
P. Spanò, INAF - Osservatorio Astronomico di Brera (Italy)
NRC Herzberg Institute of Astrophysics (Canada)
A. Bianco, INAF - Osservatorio Astronomico di Brera (Italy)
R. Briguglio, INAF - Osservatorio Astrofisico di Arcetri (Italy)
M. Cecconi, Fundacion Galileo Galilei - INAF (Spain)
L. Miglietta, INAF - Osservatorio Astrofisico di Arcetri (Italy)
E. Molinari, Fundacion Galileo Galilei - INAF (Spain)
G. Pariani, INAF - Osservatorio Astronomico di Brera (Italy)
A. Riccardi, INAF - Osservatorio Astrofisico di Arcetri (Italy)
M. Riva, INAF - Osservatorio Astronomico di Brera (Italy)
D. Tresoldi, INAF - Osservatorio Astronomico di Brera (Italy)
M. Xompero, INAF - Osservatorio Astrofisico di Arcetri (Italy)
F. Zerbi, INAF - Osservatorio Astronomico di Brera (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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