The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here: https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

Torben Anderssen. Profile picture.

Torben Andersen

Professor emeritus

Torben Anderssen. Profile picture.

Control strategy for the adaptive optics of the Euro50

Author

  • Mette Owner-Petersen
  • Torben Andersen
  • Alexander Gontcharov
  • Jacques M. Beckers

Editor

  • J. Roger P Angel
  • Roberto Gilmozzi

Summary, in English

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).

Department/s

  • Lund Observatory

Publishing year

2003

Language

English

Pages

427-435

Publication/Series

Future Giant Telescopes. Proceedings of the SPIE

Volume

4840

Document type

Conference paper

Publisher

SPIE

Topic

  • Astronomy, Astrophysics and Cosmology

Status

Published

ISBN/ISSN/Other

  • ISBN: 081944619X