Tilt Sensing using a Multi-color Laser Beacon

Details Tilt Sensing using a Multi-color Laser Beacon Tilt Sensing using a Multi-color Laser Beacon

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aas...181.6202m&link_type=abstract

American Astronomical Society, 181st AAS Meeting, #62.02; Bulletin of the American Astronomical Society, Vol. 24, p.1219

Astronomy and Astrophysics

Astronomy

Scientific paper

In principle, natural guide stars are \underbar¬ required to sense overall wavefront tilt across a telescope aperture caused by seeing. We propose a multi-color laser beacon. The general concept is to make the atmosphere produce a second beacon of a different color at altitude. Two mechanisms capable of producing the color conversion are Raman scattering and resonant fluorescence. The wavefront tilt can be inferred by measuring the differential wavefront tilt between the two beacons caused by dispersion.

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