From Euro50 towards a European ELT
(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:
https://lup.lub.lu.se/record/616825
- author
- Ardeberg, Arne LU ; Andersen, Torben LU ; Beckers, Jacques ; Browne, Michael LU ; Enmark, Anita LU ; Knutsson, Per LU and Owner-Petersen, Mette LU
- organization
- publishing date
- 2006
- 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
- 2024-11-05 03:39:54
@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}}, keywords = {{Hierarchic control; Laser guide star (LGS); Optical path differences (OPD); Differential refraction; Point spread function (PSF); Extremely large telescope (ELT); Edge sensors}}, 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}}, }