Development of laser guide stars and adaptive optics for large astronomical telescopes

Details Development of laser guide stars and adaptive optics for large astronomical telescopes Development of laser guide stars and adaptive optics for large astronomical telescopes

Jun 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992esoc...42..443m&link_type=abstract

Progress in Telescope and Instrumentation Technologies, ESO Conference and Workshop Proceedings, ESO Conference on Progress in T

Physics

Optics

Adaptive Optics, Atmospheric Lasers, Feasibility Analysis, Isotope Separation, Telescopes, Atmospheric Stratification, Dye Lasers, Feedback Control

Scientific paper

A feasibility experiment to demonstrate high-order adaptive optics using a sodium-layer laser guide star is described. The copper-vapor-pumped dye lasers developed for LLNL's atomic Vapor Laser Isotope Separation program is used to create the laser guide star. Closed-loop adaptive corrections will be accomplished using a 69-subaperture adaptive optics system on a one-meter telescope at LLNL. The laser beam is projected upwards from a beam director approximately 5 meters away from the main telescope, and is expected to form a spot 1-2 meters in diameter at the atmospheric sodium layer (95 km altitude). The overall system architecture and adaptive optics components are described, and the expected performance is analyzed. Our long-term goal is to develop sodium-layer laser guide stars and adaptive optics for large astronomical telescopes. Preliminary design trade-offs for the Keck Telescope at Mauna Kea are discussed.

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