Sharpening of natural guide stars for low-order wavefront sensing using patrolling laser guide stars
- Creators
- Dekany, R.
- Neyman, C.
- Flicker, R.
Abstract
A laser guide star (LGS) adaptive optics (AO) system generally requires additional tip/tilt information derived using a natural guide star (NGS), while multi-LGS systems will benefit from measurement of additional low-order wavefront modes using one or more NGS's. If we use AO sharpened NGS's, we can improve both the measurement accuracy and accessible sky fraction while also minimizing the observational overhead of faint NGS acquisition. Multi-object adaptive optics (MOAO) sharpening of NGS is possible where a good estimate of the NGS wavefront can be made, for example where tomographic wavefront information is available. We describe a new approach for high Strehl ratio sharpening, based on additional patrolling laser beacons, to eliminate generalized anisoplanatism and minimize tomography error in the NGS direction.
Additional Information
© 2008 Society of Photo-Optical Instrumentation Engineers (SPIE). This research was carried out in support of the W. M. Keck Observatory Next Generation Adaptive Optics System preliminary design phase. We wish to acknowledge support for this effort from the National Science Foundation through the Telescope System Instrumentation Program (TSIP) and thank the technical staff at TMT for their support of the LAOS simulation code.Attached Files
Published - 701525.pdf
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Additional details
- Eprint ID
- 86709
- Resolver ID
- CaltechAUTHORS:20180530-105545916
- NSF
- Created
-
2018-05-30Created from EPrint's datestamp field
- Updated
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2021-11-15Created from EPrint's last_modified field
- Series Name
- Proceedings of SPIE
- Series Volume or Issue Number
- 7015