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Novel concept for large deformable mirrors

Andersen, Torben LU ; Garpinger, Olof LU ; Owner-Petersen, Mette LU ; Bjoorn, Fredrik ; Svahn, Roger and Ardeberg, Arne LU (2006) In Optical Engineering 45(7).
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... (More)
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. (Less)
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author
; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
actuators, mirrors, adaptive optics, active optics, wavefront, telescopes, compensation
in
Optical Engineering
volume
45
issue
7
publisher
SPIE
external identifiers
  • wos:000239347200008
  • scopus:33749405210
ISSN
0091-3286
DOI
10.1117/1.2227014
language
English
LU publication?
yes
id
20bf48b6-96a7-43c1-a60b-134dded6cdfb (old id 399379)
date added to LUP
2016-04-01 16:18:08
date last changed
2021-10-06 03:30:59
@article{20bf48b6-96a7-43c1-a60b-134dded6cdfb,
  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.},
  author       = {Andersen, Torben and Garpinger, Olof and Owner-Petersen, Mette and Bjoorn, Fredrik and Svahn, Roger and Ardeberg, Arne},
  issn         = {0091-3286},
  language     = {eng},
  number       = {7},
  publisher    = {SPIE},
  series       = {Optical Engineering},
  title        = {Novel concept for large deformable mirrors},
  url          = {http://dx.doi.org/10.1117/1.2227014},
  doi          = {10.1117/1.2227014},
  volume       = {45},
  year         = {2006},
}