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Multi-conjugate Adaptive Optics for the Swedish ELT Investigation of the Effects of Laser Guide Stars at a finite Distance.

Owner-Petersen, Mette LU and Gontcharov, Alexander LU (2002) In Beyond conventional adaptive optics : a conference devoted to the development of adaptive optics for extremely large telescopes. Proceedings of the Topical Meeting held May 7-10, 2001, Venice, Italy. 58. p.299-299
Abstract
In a recent paper we presented a procedure for optimal analyticalcontrol of several deformable mirrors based on only the measured guidestar wavefronts. The expected performance was evaluated for variousguide star configurations using up to three deformable mirrors. Forsimplicity the guide stars were assumed to be infinitely distant. Inthis paper we address the effect of using laser guide stars in 90 kmaltitude for the wavefront measurements. As a consequence of this, theimage of a distant science star will not be adequately corrected bycounteracting the wavefront error measured by a laser guide star in thesame direction as the science star. This problem will be more pronouncedthe larger is the telescope diameter. We present a modified... (More)
In a recent paper we presented a procedure for optimal analyticalcontrol of several deformable mirrors based on only the measured guidestar wavefronts. The expected performance was evaluated for variousguide star configurations using up to three deformable mirrors. Forsimplicity the guide stars were assumed to be infinitely distant. Inthis paper we address the effect of using laser guide stars in 90 kmaltitude for the wavefront measurements. As a consequence of this, theimage of a distant science star will not be adequately corrected bycounteracting the wavefront error measured by a laser guide star in thesame direction as the science star. This problem will be more pronouncedthe larger is the telescope diameter. We present a modified version ofthe mirror control algorithm taking the finite distance of the laserguide stars into account and some preliminary performance evaluationswith special emphasis on the consequences for ELTs. (Less)
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organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
Beyond conventional adaptive optics : a conference devoted to the development of adaptive optics for extremely large telescopes. Proceedings of the Topical Meeting held May 7-10, 2001, Venice, Italy.
editor
Vernet, E; Ragazzoni, R; Esposito, S; Hubin, N; ; ; and
volume
58
pages
299 - 299
ISBN
3923524617
language
English
LU publication?
yes
id
3e273181-6aea-4d2e-b327-79275939bcb4 (old id 528022)
date added to LUP
2007-09-24 14:19:43
date last changed
2016-04-16 11:55:17
@inproceedings{3e273181-6aea-4d2e-b327-79275939bcb4,
  abstract     = {In a recent paper we presented a procedure for optimal analyticalcontrol of several deformable mirrors based on only the measured guidestar wavefronts. The expected performance was evaluated for variousguide star configurations using up to three deformable mirrors. Forsimplicity the guide stars were assumed to be infinitely distant. Inthis paper we address the effect of using laser guide stars in 90 kmaltitude for the wavefront measurements. As a consequence of this, theimage of a distant science star will not be adequately corrected bycounteracting the wavefront error measured by a laser guide star in thesame direction as the science star. This problem will be more pronouncedthe larger is the telescope diameter. We present a modified version ofthe mirror control algorithm taking the finite distance of the laserguide stars into account and some preliminary performance evaluationswith special emphasis on the consequences for ELTs.},
  author       = {Owner-Petersen, Mette and Gontcharov, Alexander},
  booktitle    = {Beyond conventional adaptive optics : a conference devoted to the development of adaptive optics for extremely large telescopes. Proceedings of the Topical Meeting held May 7-10, 2001, Venice, Italy.},
  editor       = {Vernet, E and Ragazzoni, R and Esposito, S and Hubin, N},
  isbn         = {3923524617},
  language     = {eng},
  pages        = {299--299},
  title        = {Multi-conjugate Adaptive Optics for the Swedish ELT Investigation of the Effects of Laser Guide Stars at a finite Distance.},
  volume       = {58},
  year         = {2002},
}