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Control strategy for the adaptive optics of the Euro50

Owner-Petersen, Mette LU ; Andersen, Torben LU ; Gontcharov, Alexander LU and Beckers, Jacques M. (2003) In Future Giant Telescopes. Proceedings of the SPIE 4840. p.427-435
Abstract
The scheme presently envisaged for the EURO50 adaptive optics ispresented. The Euro50 adaptive optics will primarily work with laserguide stars (LGSs) and control of either one or two deformable mirrors(SCAO and DCAO respectively), but operation using a natural guide star(NGS) is also foreseen. The point spread function (PSF) for SCAOoperation using a single NGS is evaluated. An algorithm for optimalcontrol of the deformable mirrors (DMs) using LGSs and Shack-Hartmanwavefront sensors is presented and commented upon. It is an extension ofa recently developed algorithm for optimal control using NGSs andworking in the spatial Fourier domain. In addition the concept of avirtual wavefront sensor is introduced to overcome the difficulty... (More)
The scheme presently envisaged for the EURO50 adaptive optics ispresented. The Euro50 adaptive optics will primarily work with laserguide stars (LGSs) and control of either one or two deformable mirrors(SCAO and DCAO respectively), but operation using a natural guide star(NGS) is also foreseen. The point spread function (PSF) for SCAOoperation using a single NGS is evaluated. An algorithm for optimalcontrol of the deformable mirrors (DMs) using LGSs and Shack-Hartmanwavefront sensors is presented and commented upon. It is an extension ofa recently developed algorithm for optimal control using NGSs andworking in the spatial Fourier domain. In addition the concept of avirtual wavefront sensor is introduced to overcome the difficulty intransmitting a large number (37) of LGSs to the final DCAO focus withboth adequate field and adequate aberrations. The expected performanceis estimated in form of maps of the Strehl ratio versus field angleusing a standard seven layer atmospheric model for the Observatorio delRoque de los Muchachos (ORM) site on la Palma for the case of the outerscale being either 20 m (nominal for ORM) or infinity (Kolmogorov - mostpessimistic case). (Less)
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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
427 - 435
publisher
SPIE
external identifiers
  • wos:000182018400039
  • scopus:0037649992
ISBN
081944619X
DOI
10.1117/12.458040
language
English
LU publication?
yes
id
2432e676-e978-435a-9a22-7f1aa6553352 (old id 528121)
date added to LUP
2007-09-24 14:17:25
date last changed
2017-03-12 04:28:36
@inproceedings{2432e676-e978-435a-9a22-7f1aa6553352,
  abstract     = {The scheme presently envisaged for the EURO50 adaptive optics ispresented. The Euro50 adaptive optics will primarily work with laserguide stars (LGSs) and control of either one or two deformable mirrors(SCAO and DCAO respectively), but operation using a natural guide star(NGS) is also foreseen. The point spread function (PSF) for SCAOoperation using a single NGS is evaluated. An algorithm for optimalcontrol of the deformable mirrors (DMs) using LGSs and Shack-Hartmanwavefront sensors is presented and commented upon. It is an extension ofa recently developed algorithm for optimal control using NGSs andworking in the spatial Fourier domain. In addition the concept of avirtual wavefront sensor is introduced to overcome the difficulty intransmitting a large number (37) of LGSs to the final DCAO focus withboth adequate field and adequate aberrations. The expected performanceis estimated in form of maps of the Strehl ratio versus field angleusing a standard seven layer atmospheric model for the Observatorio delRoque de los Muchachos (ORM) site on la Palma for the case of the outerscale being either 20 m (nominal for ORM) or infinity (Kolmogorov - mostpessimistic case).},
  author       = {Owner-Petersen, Mette and Andersen, Torben and Gontcharov, Alexander and Beckers, Jacques M.},
  booktitle    = {Future Giant Telescopes. Proceedings of the SPIE},
  editor       = {Angel, J. Roger P and Gilmozzi, Roberto},
  isbn         = {081944619X},
  language     = {eng},
  pages        = {427--435},
  publisher    = {SPIE},
  title        = {Control strategy for the adaptive optics of the Euro50},
  url          = {http://dx.doi.org/10.1117/12.458040},
  volume       = {4840},
  year         = {2003},
}