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From Euro50 towards a European ELT

Ardeberg, Arne LU ; Andersen, Torben LU ; Beckers, Jacques ; Browne, Michael LU ; Enmark, Anita LU ; Knutsson, Per LU and Owner-Petersen, Mette LU (2006) Ground-based and Airborne Telescopes 6267 II. p.26725-26725
Abstract
With Euro50 as a convenient telescope laboratory, the Euro50 team has continued development aiming at a European extremely large telescope (ELT). Here, we give a progress report. The needs of science and instrumentation are briefly discussed as is the importance of photometric stability and precision. Results are reported from work on integrated modelling. Details are given concerning point-spread functions (PSFs) obtained with and without adaptive optics (AO). Our results are rather encouraging concerning AO photometry and compensation of edge sensor noise as well as regarding seeing-limited ELT operation. The current status of our development of large deformable mirrors is shown. Low-cost actuators and deflection sensors have been... (More)
With Euro50 as a convenient telescope laboratory, the Euro50 team has continued development aiming at a European extremely large telescope (ELT). Here, we give a progress report. The needs of science and instrumentation are briefly discussed as is the importance of photometric stability and precision. Results are reported from work on integrated modelling. Details are given concerning point-spread functions (PSFs) obtained with and without adaptive optics (AO). Our results are rather encouraging concerning AO photometry and compensation of edge sensor noise as well as regarding seeing-limited ELT operation. The current status of our development of large deformable mirrors is shown. Low-cost actuators and deflection sensors have been developed as have hierarchic control algorithms. Fabrication of large thin mirror blanks as well as polishing and handling of thin mirrors has been studied experimentally. Regarding adaptive optics, we discuss differential refraction and the limitations imposed by dispersive optical path differences (OPDs) and dispersive anisoplanatism. We report on progress in laser guide star (LGS) performance and a real-time online experiment in multi-conjugate AO (MCAO). We discuss ELTs, high-resolution spectroscopy and pupil slicing with and without use of AO. Finally, we present some recent studies of ELT enclosure options. (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
Hierarchic control, Laser guide star (LGS), Optical path differences (OPD), Differential refraction, Point spread function (PSF), Extremely large telescope (ELT), Edge sensors
host publication
Proceedings of SPIE - The International Society for Optical Engineering
volume
6267 II
pages
26725 - 26725
publisher
International Society for Optical Engineering
conference name
Ground-based and Airborne Telescopes
conference location
Orlando, FL, United States
conference dates
2006-05-24 - 2006-05-31
external identifiers
  • wos:000240018600070
  • scopus:33749016222
ISSN
0277-786X
1996-756X
DOI
10.1117/12.671392
language
English
LU publication?
yes
id
4b89048f-8538-41aa-944b-c906a2473af9 (old id 616825)
date added to LUP
2016-04-01 11:34:27
date last changed
2021-09-22 05:29:25
@inproceedings{4b89048f-8538-41aa-944b-c906a2473af9,
  abstract     = {With Euro50 as a convenient telescope laboratory, the Euro50 team has continued development aiming at a European extremely large telescope (ELT). Here, we give a progress report. The needs of science and instrumentation are briefly discussed as is the importance of photometric stability and precision. Results are reported from work on integrated modelling. Details are given concerning point-spread functions (PSFs) obtained with and without adaptive optics (AO). Our results are rather encouraging concerning AO photometry and compensation of edge sensor noise as well as regarding seeing-limited ELT operation. The current status of our development of large deformable mirrors is shown. Low-cost actuators and deflection sensors have been developed as have hierarchic control algorithms. Fabrication of large thin mirror blanks as well as polishing and handling of thin mirrors has been studied experimentally. Regarding adaptive optics, we discuss differential refraction and the limitations imposed by dispersive optical path differences (OPDs) and dispersive anisoplanatism. We report on progress in laser guide star (LGS) performance and a real-time online experiment in multi-conjugate AO (MCAO). We discuss ELTs, high-resolution spectroscopy and pupil slicing with and without use of AO. Finally, we present some recent studies of ELT enclosure options.},
  author       = {Ardeberg, Arne and Andersen, Torben and Beckers, Jacques and Browne, Michael and Enmark, Anita and Knutsson, Per and Owner-Petersen, Mette},
  booktitle    = {Proceedings of SPIE - The International Society for Optical Engineering},
  issn         = {0277-786X},
  language     = {eng},
  pages        = {26725--26725},
  publisher    = {International Society for Optical Engineering},
  title        = {From Euro50 towards a European ELT},
  url          = {http://dx.doi.org/10.1117/12.671392},
  doi          = {10.1117/12.671392},
  volume       = {6267 II},
  year         = {2006},
}