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A new concept for large deformable mirrors for extremely large telescopes

Andersen, Torben LU ; Owner-Petersen, Mette LU ; Ardeberg, Arne LU and Korhonen, T (2006) Astronomical Telescopes and Instrumentation - Advances in Adaptive Optics II, 2006 6272(1). p.324-331
Abstract
For extremely large telescopes, there is strong need for thin deformable mirrors in the 3-4 m class. So far, feasibility of such mirrors has not been demonstrated. Extrapolation from existing techniques suggests that the mirrors could be highly expensive. We give a progress report on a study of an approach for construction of large deformable mirrors with a moderate cost. We have developed low-cost actuators and deflection sensors that can absorb mounting tolerances in the millimeter range, and we have tested prototypes in the laboratory. Studies of control laws for mirrors with thousands of sensors and actuators are in good progress and simulations have been carried out. Manufacturing of thin, glass mirror blanks is being studied and... (More)
For extremely large telescopes, there is strong need for thin deformable mirrors in the 3-4 m class. So far, feasibility of such mirrors has not been demonstrated. Extrapolation from existing techniques suggests that the mirrors could be highly expensive. We give a progress report on a study of an approach for construction of large deformable mirrors with a moderate cost. We have developed low-cost actuators and deflection sensors that can absorb mounting tolerances in the millimeter range, and we have tested prototypes in the laboratory. Studies of control laws for mirrors with thousands of sensors and actuators are in good progress and simulations have been carried out. Manufacturing of thin, glass mirror blanks is being studied and first prototypes have been produced by a slumping technique. Development of polishing procedures for thin mirrors is in progress (Less)
Please use this url to cite or link to this publication:
author
; ; and
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
glass mirror, slumping technique, mounting tolerance, deflection sensor, low-cost actuator, extrapolation, extremely large telescope, large deformable mirror, adaptive optics, telescope, 3 to 4 m, polishing
host publication
Proceedings of the SPIE - The International Society for Optical Engineering
volume
6272
issue
1
pages
324 - 331
publisher
SPIE
conference name
Astronomical Telescopes and Instrumentation - Advances in Adaptive Optics II, 2006
conference location
Orlando, FL, United States
conference dates
2006-05-24 - 2006-05-31
external identifiers
  • wos:000240348300031
  • scopus:33749384126
ISSN
0277-786X
1996-756X
DOI
10.1117/12.671506
language
English
LU publication?
yes
id
cd499e2b-1df0-43ee-b8d9-96ea6b1c4f3f (old id 616907)
date added to LUP
2016-04-01 11:56:46
date last changed
2021-02-17 05:49:38
@inproceedings{cd499e2b-1df0-43ee-b8d9-96ea6b1c4f3f,
  abstract     = {For extremely large telescopes, there is strong need for thin deformable mirrors in the 3-4 m class. So far, feasibility of such mirrors has not been demonstrated. Extrapolation from existing techniques suggests that the mirrors could be highly expensive. We give a progress report on a study of an approach for construction of large deformable mirrors with a moderate cost. We have developed low-cost actuators and deflection sensors that can absorb mounting tolerances in the millimeter range, and we have tested prototypes in the laboratory. Studies of control laws for mirrors with thousands of sensors and actuators are in good progress and simulations have been carried out. Manufacturing of thin, glass mirror blanks is being studied and first prototypes have been produced by a slumping technique. Development of polishing procedures for thin mirrors is in progress},
  author       = {Andersen, Torben and Owner-Petersen, Mette and Ardeberg, Arne and Korhonen, T},
  booktitle    = {Proceedings of the SPIE - The International Society for Optical Engineering},
  issn         = {0277-786X},
  language     = {eng},
  number       = {1},
  pages        = {324--331},
  publisher    = {SPIE},
  title        = {A new concept for large deformable mirrors for extremely large telescopes},
  url          = {http://dx.doi.org/10.1117/12.671506},
  doi          = {10.1117/12.671506},
  volume       = {6272},
  year         = {2006},
}