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Optical Engineering

Novel concept for large deformable mirrors
Author(s): Torben E. Andersen; O. Garpinger; Mette Owner-Petersen; F. Bjoorn; R. Svahn; Arne L. Ardeberg
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Paper Abstract

Large, high-bandwidth deformable mirrors (DMs) with thousands of actuators for adaptive optics are of high interest for existing large telescopes and indispensable for construction of efficient future extremely large telescopes. Different actuation and sensing principles are possible. We propose a novel concept using commercially available voice coil actuators attached to the back of the mirror with suction cups and using LVDT sensors on the actuators for local stabilization. Also, a new low-cost sensor for easy measurement of DM displacement or velocity has been developed. It has a sensitivity better than 20 nm and a bandwidth wider than 20 to 1000 Hz. Finally, studies are in progress of global, hierarchical mirror form controllers based on many parallel multiple-input, multiple-output regulators of low order.

Paper Details

Date Published: 1 July 2006
PDF: 13 pages
Opt. Eng. 45(7) 073001 doi: 10.1117/1.2227014
Published in: Optical Engineering Volume 45, Issue 7
Show Author Affiliations
Torben E. Andersen, Lunds Univ. (Sweden)
O. Garpinger, Lunds Univ. (Sweden)
Mette Owner-Petersen, Lunds Univ. (Sweden)
F. Bjoorn, Lunds Univ. (Sweden)
R. Svahn, Lunds Univ. (Sweden)
Arne L. Ardeberg, Lunds Univ. (Sweden)

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