
Arne Ardeberg
Professor emeritus

Novel concept for large deformable mirrors
Author
Summary, in English
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.
Department/s
- Lund Observatory - Has been reorganised
- Department of Automatic Control
Publishing year
2006
Language
English
Publication/Series
Optical Engineering
Volume
45
Issue
7
Document type
Journal article
Publisher
SPIE
Topic
- Astronomy, Astrophysics and Cosmology
Keywords
- actuators
- mirrors
- adaptive optics
- active optics
- wavefront
- telescopes
- compensation
Status
Published
ISBN/ISSN/Other
- ISSN: 0091-3286