From Euro50 towards a European ELT

Arne Ardeberg; Torben Andersen; Jacques Beckers; Michael Browne; Anita Enmark; Per Knutsson; Mette Owner-Petersen

doi:10.1117/12.671392

From Euro50 towards a European ELT

Arne Ardeberg, Torben Andersen, Jacques Beckers, Michael Browne, Anita Enmark, Per Knutsson, Mette Owner-Petersen

Research output: Chapter in Book/Report/Conference proceeding › Paper in conference proceeding › peer-review

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.

Original language	English
Title of host publication	Proceedings of SPIE - The International Society for Optical Engineering
Publisher	International Society for Optical Engineering
Pages	26725-26725
Volume	6267 II
DOIs	https://doi.org/10.1117/12.671392
Publication status	Published - 2006
Event	Ground-based and Airborne Telescopes - Orlando, FL, United States Duration: 2006 May 24 → 2006 May 31

Publication series

Name
Volume	6267 II
ISSN (Print)	1996-756X
ISSN (Electronic)	0277-786X

Conference

Conference	Ground-based and Airborne Telescopes
Country/Territory	United States
City	Orlando, FL
Period	2006/05/24 → 2006/05/31

Subject classification (UKÄ)

Astronomy, Astrophysics and Cosmology

Free keywords

Hierarchic control
Laser guide star (LGS)
Optical path differences (OPD)
Differential refraction
Point spread function (PSF)
Extremely large telescope (ELT)
Edge sensors

Access to Document

10.1117/12.671392

Cite this

@inproceedings{4b89048f853841aa944bc906a2473af9,

title = "From Euro50 towards a European ELT",

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.",

keywords = "Hierarchic control, Laser guide star (LGS), Optical path differences (OPD), Differential refraction, Point spread function (PSF), Extremely large telescope (ELT), Edge sensors",

author = "Arne Ardeberg and Torben Andersen and Jacques Beckers and Michael Browne and Anita Enmark and Per Knutsson and Mette Owner-Petersen",

year = "2006",

doi = "10.1117/12.671392",

language = "English",

volume = "6267 II",

publisher = "International Society for Optical Engineering",

pages = "26725--26725",

booktitle = "Proceedings of SPIE - The International Society for Optical Engineering",

address = "United States",

note = "Ground-based and Airborne Telescopes ; Conference date: 24-05-2006 Through 31-05-2006",

}

Ardeberg, A , Andersen, T, Beckers, J, Browne, M, Enmark, A, Knutsson, P & Owner-Petersen, M 2006, From Euro50 towards a European ELT. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 6267 II, International Society for Optical Engineering, pp. 26725-26725, Ground-based and Airborne Telescopes, Orlando, FL, United States, 2006/05/24. https://doi.org/10.1117/12.671392

TY - GEN

T1 - From Euro50 towards a European ELT

AU - Ardeberg, Arne

AU - Andersen, Torben

AU - Beckers, Jacques

AU - Browne, Michael

AU - Enmark, Anita

AU - Knutsson, Per

AU - Owner-Petersen, Mette

PY - 2006

Y1 - 2006

N2 - 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.

AB - 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.

KW - Hierarchic control

KW - Laser guide star (LGS)

KW - Optical path differences (OPD)

KW - Differential refraction

KW - Point spread function (PSF)

KW - Extremely large telescope (ELT)

KW - Edge sensors

U2 - 10.1117/12.671392

DO - 10.1117/12.671392

M3 - Paper in conference proceeding

VL - 6267 II

SP - 26725

EP - 26725

BT - Proceedings of SPIE - The International Society for Optical Engineering

PB - International Society for Optical Engineering

T2 - Ground-based and Airborne Telescopes

Y2 - 24 May 2006 through 31 May 2006

ER -

From Euro50 towards a European ELT

Abstract

Publication series

Conference

Subject classification (UKÄ)

Free keywords

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Cite this