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Adaptive optics for the Euro50: design and performance

Gontcharov, Alexander LU ; Owner-Petersen, Mette LU ; Andersen, Torben LU ; Beckers, Jacques M. and Devaney, Nicholas (2003) Conference on Future Giant Telescopes In Future Giant Telescopes. Proceedings of the SPIE 4840. p.36-46
Abstract
The optical design for the proposed Euro50 extremely large telescopewith integrated adaptive optics (AO) is presented. For atmosphericturbulence correction, we propose using single and dual-conjugate AOsystems working with natural and laser guide stars. The corrective shapeof the deformable mirrors (DMs) is derived from an analytical algorithmbased on minimization of the sum of the residual power spectra of thephase fluctuations seen by guide stars after correction. Predictions forperformance of the Euro50 ELT with Dual-conjugate AO are given for the Kband using a seven layer atmospheric model for the atmosphere at theObservatorio del Roque de los Muchachos (ORM) on La Palma. The averageStrehl ratio is used to quantify the system... (More)
The optical design for the proposed Euro50 extremely large telescopewith integrated adaptive optics (AO) is presented. For atmosphericturbulence correction, we propose using single and dual-conjugate AOsystems working with natural and laser guide stars. The corrective shapeof the deformable mirrors (DMs) is derived from an analytical algorithmbased on minimization of the sum of the residual power spectra of thephase fluctuations seen by guide stars after correction. Predictions forperformance of the Euro50 ELT with Dual-conjugate AO are given for the Kband using a seven layer atmospheric model for the atmosphere at theObservatorio del Roque de los Muchachos (ORM) on La Palma. The averageStrehl ratio is used to quantify the system performance for differentvalues of actuator pitch and DM conjugation altitudes. The influence ofthe outer scale and telescope pointing on the RMS stroke of the DMs ispresented. It is concluded that construction of such a system isfeasible and that there is a need for development of a simulation toolto verify the analytical calculations. Precise knowledge of the outerscale of the atmosphere at the ORM is needed to establish the dynamicalrange of the mirrors. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
Future Giant Telescopes. Proceedings of the SPIE
editor
Angel, J. Roger P; Gilmozzi, Roberto; and
volume
4840
pages
36 - 46
publisher
SPIE
conference name
Conference on Future Giant Telescopes
external identifiers
  • wos:000182018400005
  • scopus:0038413990
ISBN
081944619X
DOI
10.1117/12.458028
language
English
LU publication?
yes
id
f4d29865-0716-4ab3-8b6e-9fd79c333ed3 (old id 528150)
date added to LUP
2007-09-18 09:26:33
date last changed
2017-03-12 04:27:10
@inproceedings{f4d29865-0716-4ab3-8b6e-9fd79c333ed3,
  abstract     = {The optical design for the proposed Euro50 extremely large telescopewith integrated adaptive optics (AO) is presented. For atmosphericturbulence correction, we propose using single and dual-conjugate AOsystems working with natural and laser guide stars. The corrective shapeof the deformable mirrors (DMs) is derived from an analytical algorithmbased on minimization of the sum of the residual power spectra of thephase fluctuations seen by guide stars after correction. Predictions forperformance of the Euro50 ELT with Dual-conjugate AO are given for the Kband using a seven layer atmospheric model for the atmosphere at theObservatorio del Roque de los Muchachos (ORM) on La Palma. The averageStrehl ratio is used to quantify the system performance for differentvalues of actuator pitch and DM conjugation altitudes. The influence ofthe outer scale and telescope pointing on the RMS stroke of the DMs ispresented. It is concluded that construction of such a system isfeasible and that there is a need for development of a simulation toolto verify the analytical calculations. Precise knowledge of the outerscale of the atmosphere at the ORM is needed to establish the dynamicalrange of the mirrors.},
  author       = {Gontcharov, Alexander and Owner-Petersen, Mette and Andersen, Torben and Beckers, Jacques M. and Devaney, Nicholas},
  booktitle    = {Future Giant Telescopes. Proceedings of the SPIE},
  editor       = {Angel, J. Roger P and Gilmozzi, Roberto},
  isbn         = {081944619X},
  language     = {eng},
  pages        = {36--46},
  publisher    = {SPIE},
  title        = {Adaptive optics for the Euro50: design and performance},
  url          = {http://dx.doi.org/10.1117/12.458028},
  volume       = {4840},
  year         = {2003},
}