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UnISIS: Laser Guide Star and Natural Guide Star Adaptive Optics System

Laird A. Thompson, Scott W. Teare, Yao-Heng Xiong, Richard M. Castle, Abhijit Chakraborty, Robert A. Gruendl and Robert W. Leach
Publications of the Astronomical Society of the Pacific
Vol. 121, No. 879 (2009 May), pp. 498-511
DOI: 10.1086/599574
Stable URL: http://www.jstor.org/stable/10.1086/599574
Page Count: 14
Subjects: Astronomy
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Abstract

ABSTRACT.UnISIS (University of Illinois Seeing Improvement System) is a versatile adaptive optics system mounted on a large optics bench at the coudé focus of the Mount Wilson 2.5-m telescope. It was designed to have both laser guide star (LGS) and natural guide star (NGS) adaptive optics capabilities. The LGS side of the system relies on a pulsed UV laser with raw power of 30 W capable of creating an artificial laser star via Rayleigh scattering 18 km above the telescope. The LGS system can work at temporal response rates as high as 333 Hz—limited by the UV laser pulse rate—and the NGS system can work at rates up to 1.4 kHz. Each side of the system has its own high-speed wavefront sensor that runs separately, but in the LGS mode the NGS wavefront sensor is converted into a natural star tip-tilt sensor. The deformable mirror is conjugate to the telescope’s primary mirror and has one of the most densely packed sets of actuators of any adaptive optics system currently in operation. This paper provides details of the UnISIS design and describes key updates we have made to the system. We show NGS AO-corrected images from the sky from the 900 nm zz-band through the 2.12 μm KsKs band. The highest NGS Strehl achieved to date is 0.67 at KsKs band.

Notes and References

This item contains 43 references.

REFERENCES
  • ['Babcock, H. W. 1953, PASP, 65, 229']
  • ['Baranec, C., et al. 2009, ApJ, 693, 1814']
  • ['Boccas, M., et al. 2006, Proc. SPIE, 6272, 114']
  • ['Chakraborty, A., Thompson, L. A., & Rogosky, M. 2005, Opt. Express, 13, 2394']
  • ['Chun, M., et al. 2008, Proc. SPIE, 7015 (in press)']
  • ['Foy, R., & Labeyrie, A. 1985, A&A, 152, L29']
  • ['Fugate, R. Q., et al. 1994, J. Opt. Soc. Am. A, 11, 310']
  • ['Gardner, C. S., Welsh, B. M., & Thompson, L. A. 1990, Proc. IEEE, 78, 1721']
  • ['Happer, W., MacDonald, G. J., Max, C. E., & Dyson, F. J. 1994, J. Opt. Soc. Am. A, 11, 263']
  • ['Hardy, J. W. 1998, Adaptive Optics for Astronomical Telescopes (Oxford: Oxford Univ. Press)']
  • ['Linfield, R. P., et al. 2001, ApJ, 554, 505']
  • ['Marechal, A. 1947, Rev. d’Optique, 26, 257']
  • ['Meixner, M. M., et al. 1999, PASP, 111, 997']
  • ['Milton, N. M., et al. 2008, Proc. SPIE, 7015, in press']
  • ['Racine, R. 2006, PASP, 118, 1066']
  • ['Rigaut, F., Ellerbroek, B., & Flicker, R. 2000, Proc. SPIE, 4007, 1022']
  • ['Ritchey, G. W. 1928, J. RAS Canada, 22, 359']
  • ['Roberts, J, et al. 2008, Proc. SPIE, 7015, in press']
  • ['Roberts, L. C., Jr., & Neyman, C. R. 2002, PASP, 114, 1260']
  • ['Rutten, R. G. M., & Talbot, G. 2005, ING Newsletter, 10, 11']
  • ['Sandler, D. G. 1999, in Astronomical Adaptive Optics, ed. Roddier, F. (Cambridge: Cambridge Univ. Press)']
  • ['Schneider, T. G. 2004, Dr. Dobb’s Journal, 29, 24']
  • ['Shelton, C., & Baliunas, S. 1994, in Optical Astronomy from the Earth and Moon, ed. Pyper, D. M., & Angione, R. J. (San Fancisco: ASP)']
  • ['Shelton, C., et al. 1997, Proc. SPIE, 3126, 321']
  • ['Strobele, S., et al. 2006, Proc. SPIE, 6272, 9']
  • ['Takami, H., et al. 2004, PASJ, 56, 225']
  • ['Teare, S. W., & Thompson, L. A. 2002, PASP, 114, 125']
  • ['Teare, S. W., et al. 2000, PASP, 112, 1496']
  • ['Thompson, L. A., & Castle, R. M. 1992, Opt. Lett., 17, 1485']
  • ['Thompson, L. A., Castle, R. M., & Carroll, D. L. 1991, Proc. SPIE, 1542, 110']
  • ['Thompson, L. A., & Gardner, C. S. 1987, Nature, 328, 229']
  • ['——— 1989, Proc. SPIE, 1114, 184']
  • ['Thompson, L. A., & Teare, S. W. 2002, PASP, 114, 1029 (Paper I)']
  • ['Thompson, L. A., et al. 2003a, Proc. SPIE, 4839, 44']
  • ['——— 2002, PASP, 114, 1143']
  • ['——— 2003b, Proc. SPIE, 5169, 11']
  • ['——— 2004, Proc. SPIE, 5490, 90']
  • ['Tokovinin, A., et al. 2004, Proc. SPIE, 5490, 870']
  • ['Toomey, D. W., & Ftaclas, C. 2003, Proc. SPIE, 4841, 889']
  • ['Wild, W. J. 1997, Proc. SPIE, 3126, 278']
  • ['——— 1998, Proc. SPIE, 3353, 1164']
  • ['Wild, W. J., et al. 1995, Proc. SPIE, 2534, 194']
  • ['Wizinowich, P. L., et al. 2006, PASP, 118, 297']