Novel concept for large deformable mirrors
Författare
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.
Publiceringsår
2006
Språk
Engelska
Publikation/Tidskrift/Serie
Optical Engineering
Volym
45
Issue
7
Dokumenttyp
Artikel i tidskrift
Förlag
SPIE
Ämne
- Astronomy, Astrophysics and Cosmology
Nyckelord
- actuators
- mirrors
- adaptive optics
- active optics
- wavefront
- telescopes
- compensation
Status
Published
ISBN/ISSN/Övrigt
- ISSN: 0091-3286