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

Authors :: Antonino Bianco
Armando Riccardi
Giorgio Pariani
L. Miglietta
Filippo Maria Zerbi
Marco Xompero
Marco Riva
Paolo Spanò
Daniela Tresoldi
Massimo Cecconi
Runa Briguglio
Emilio Molinari
Source :: SPIE Proceedings.
Publication Year :: 2012
Publisher :: SPIE, 2012.
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.<br />Adaptive Optics Systems III, July 1-6, 2012, Amsterdam, Netherlands<br />Series: Proceedings of SPIE