CaltechAUTHORS
  A Caltech Library Service

Wavefront reconstruction algorithms and simulation results for multiconjugate adaptive optics on giant telescopes

Ellerbroek, Brent L. (2004) Wavefront reconstruction algorithms and simulation results for multiconjugate adaptive optics on giant telescopes. In: Second Bäckaskog Workshop on Extremely Large Telescopes. Proceedings of SPIE. No.5382. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, pp. 478-489. ISBN 9780819452993. https://resolver.caltech.edu/CaltechAUTHORS:20190116-111218253

[img] PDF - Published Version
See Usage Policy.

492Kb

Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20190116-111218253

Abstract

The very high-order multi-conjugate adaptive optics (MCAO) systems proposed for future giant telescopes will require new, computationally efficient, concepts for wavefront reconstruction. Advanced methods from computational linear algebra have recently been applied to this problem, and explicit simulations of MCAO wavefront reconstruction problems for 30-meter class telescopes are now possible using desktop personal computers. In this paper, we present sample simulation results obtained using these techniques to illustrate the trends in MCAO performance as the telescope aperture diameter increases from 8 to 32 meters. We consider systems based upon natural guidestars, sodium laser guidestars, and Rayleigh laser guidestars. The performance achieved by the first two classes of guidestars is similar, and the variation in their performance with respect to telescope size is very gradual over this range of aperture diameters. Next, we describe work in progress to adapt the minimum variance reconstruction algorithm, which is optimized for open-loop wavefront estimation, to the more realistic and meaningful case of closed-loop wavefront control. Finally, we summarize the current status of efforts to quantify the impact of sodium laser guide star (LGS) elongation on guidestar signal requirements for LGS AO systems on 30 meter class telescopes.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.1117/12.566342DOIArticle
Alternate Title:Wavefront reconstruction algorithms and simulation results for multi-conjugate adaptive optics on giant telescopes
Additional Information:© 2004 Society of Photo-optical Instrumentation Engineers (SPIE). The New Initiatives Office is a partnership between two divisions of the Association of Universities for Research in Astronomy (AURA), Inc.: The National Optical Astronomy Observatory (NOAO) and the Gemini Observatory. NOAO is operated by AURA under a cooperative agreement with the National Science Foundation (NSF). The Gemini Observatory is operated by AURA under a cooperative agreement with the NSF on behalf of the Gemini partnership: the National Science Foundation (United States), the Particle Physics and Astronomy Research Council (United Kingdom), the National Research Council (Canada), CONICYT (Chile), the Australian Research Council (Australia), CNPq (Brazil) and CONICET (Argentina).
Funders:
Funding AgencyGrant Number
Association of Universities for Research in Astronomy (AURA)UNSPECIFIED
National Optical Astronomy ObservatoryUNSPECIFIED
Gemini ObservatoryUNSPECIFIED
NSFUNSPECIFIED
Particle Physics and Astronomy Research Council (PPARC)UNSPECIFIED
National Research Council of CanadaUNSPECIFIED
Comisión Nacional de Investigación Científica y Tecnológica (CONICYT)UNSPECIFIED
Australian Research CouncilUNSPECIFIED
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)UNSPECIFIED
Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)UNSPECIFIED
Subject Keywords:Extremely large telescopes, multi-conjugate adaptive optics, wavefront reconstruction
Series Name:Proceedings of SPIE
Issue or Number:5382
Record Number:CaltechAUTHORS:20190116-111218253
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20190116-111218253
Official Citation:Brent L. Ellerbroek, "Wavefront reconstruction algorithms and simulation results for multiconjugate adaptive optics on giant telescopes," Proc. SPIE 5382, Second Backaskog Workshop on Extremely Large Telescopes, (7 July 2004); doi: 10.1117/12.566342
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:92319
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:18 Jan 2019 04:48
Last Modified:03 Oct 2019 20:43

Repository Staff Only: item control page