Performance predictions of the GLAS Rayleigh laser guide star adaptive optics system for the 4.2-m William Herschel Telescope

Timothy J. Morris; Richard W. Wilson; Richard M. Myers; Timothy Butterley; Rene G. M. Rutten; Gordon Talbot

doi:10.1117/12.671226

28 June 2006 Performance predictions of the GLAS Rayleigh laser guide star adaptive optics system for the 4.2-m William Herschel Telescope

Timothy J. Morris, Richard W. Wilson, Richard M. Myers, Timothy Butterley, Rene G. M. Rutten, Gordon Talbot

Author Affiliations +

Proceedings Volume 6272, Advances in Adaptive Optics II; 627237 (2006) https://doi.org/10.1117/12.671226
Event: SPIE Astronomical Telescopes + Instrumentation, 2006, Orlando, Florida , United States

Abstract

Results of numerical simulations of the performance of GLAS (Ground-layer Laser Adaptive optics System) are presented. GLAS uses a Rayleigh laser guide star (LGS) created at a nominal distance of 20km from the 4.2m William Herschel Telescope primary aperture and a semi-analytical model has been used to determine the observed LGS properties. GLAS is primarily intended for use with the OASIS spectrograph working at visible wavelengths although a wider-field IR imaging camera can also use the AO corrected output. Image quality metrics relating to scientific performance for each instrument are used showing that the energy inside every OASIS lenslet across the 10" instrument FOV is approximately doubled, irrespective of atmospheric conditions or wavelength of observation.

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Timothy J. Morris, Richard W. Wilson, Richard M. Myers, Timothy Butterley, Rene G. M. Rutten, and Gordon Talbot "Performance predictions of the GLAS Rayleigh laser guide star adaptive optics system for the 4.2-m William Herschel Telescope", Proc. SPIE 6272, Advances in Adaptive Optics II, 627237 (28 June 2006); https://doi.org/10.1117/12.671226

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