
Proceedings Paper
Experimental demonstration of laser tomographic adaptive optics on a 30-meter telescope at 800 nmFormat | Member Price | Non-Member Price |
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Paper Abstract
A critical goal in the next decade is to develop techniques that will extend Adaptive Optics correction to visible
wavelengths on Extremely Large Telescopes (ELTs). We demonstrate in the laboratory the highly accurate atmospheric
tomography necessary to defeat the cone effect on ELTs, an essential milestone on the path to this capability. We
simulate a high-order Laser Tomographic AO System for a 30-meter telescope with the LTAO/MOAO testbed at UCSC.
Eight Sodium Laser Guide Stars (LGSs) are sensed by 99x99 Shack-Hartmann wavefront sensors over 75". The AO
system is diffraction-limited at a science wavelength of 800 nm
(S ~ 6-9%) over a field of regard of 20" diameter. Openloop
WFS systematic error is observed to be proportional to the total input atmospheric disturbance and is nearly the
dominant error budget term (81 nm RMS), exceeded only by tomographic wavefront estimation error (92 nm RMS).
The total residual wavefront error for this experiment is comparable to that expected for wide-field tomographic adaptive
optics systems of similar wavefront sensor order and LGS constellation geometry planned for Extremely Large
Telescopes.
Paper Details
Date Published: 15 July 2010
PDF: 10 pages
Proc. SPIE 7736, Adaptive Optics Systems II, 773626 (15 July 2010); doi: 10.1117/12.857873
Published in SPIE Proceedings Vol. 7736:
Adaptive Optics Systems II
Brent L. Ellerbroek; Michael Hart; Norbert Hubin; Peter L. Wizinowich, Editor(s)
PDF: 10 pages
Proc. SPIE 7736, Adaptive Optics Systems II, 773626 (15 July 2010); doi: 10.1117/12.857873
Show Author Affiliations
S, Mark Ammons, Steward Observatory, The Univ. of Arizona (United States)
Luke Johnson, Univ. of California, Santa Cruz (United States)
Renate Kupke, Univ. of California, Santa Cruz (United States)
Luke Johnson, Univ. of California, Santa Cruz (United States)
Renate Kupke, Univ. of California, Santa Cruz (United States)
Donald T. Gavel, Univ. of California, Santa Cruz (United States)
Claire E. Max, Univ. of California, Santa Cruz (United States)
Claire E. Max, Univ. of California, Santa Cruz (United States)
Published in SPIE Proceedings Vol. 7736:
Adaptive Optics Systems II
Brent L. Ellerbroek; Michael Hart; Norbert Hubin; Peter L. Wizinowich, Editor(s)
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