Laser guide star measurements at Lawrence Livermore National Laboratory

Details Laser guide star measurements at Lawrence Livermore National Laboratory Laser guide star measurements at Lawrence Livermore National Laboratory

Feb 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993stin...9419251f&link_type=abstract

Presented at the Society for Photo-Optical Instrumentation Engineers (SPIE) International Conference, Albuquerque, NM, 31 Jan. -

Physics

Optics

Adaptive Optics, Feedback Control, Laser Applications, Laser Guidance, Photometry, Telescopes, Atmospheric Correction, Irradiance, Power Spectra, Sodium

Scientific paper

Recent studies from the Laser Guide Star Project at Lawrence Livermore National Laboratory are presented. Photometry of the return signal has shown that the photon return is approximately 10 photons/sq cm/ms at the pupil of the receiving telescope in agreement with a detailed model of the sodium interaction. Wavefronts of the laser guide star have also been measured with a Shack-Hartmann technique and power spectra have been shown to agree with those of nearby natural stars. Plans for closed loop demonstrations using the laser guide star at LLNL and nearby Lick Observatory are discussed.

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