Physics – Optics
Scientific paper
Sep 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991natur.353..144f&link_type=abstract
Nature (ISSN 0028-0836), vol. 353, Sept. 12, 1991, p. 144-146.
Physics
Optics
88
Atmospheric Optics, Atmospheric Turbulence, Laser Beams, Light Scattering, Upper Atmosphere, Wave Front Deformation, Binary Stars, Charge Coupled Devices, Mirrors, Real Time Operation, Telescopes
Scientific paper
Experimental results are reported which demonstrate that atmospheric wavefront distortion can be measured by taking fast 'snapshots' of a guide-star formed by light scattered from a laser beam focused in the upper atmosphere. These results agree with a theoretical prediction that the mean-square wavefront error created by using an artificial guide-star at a finite distance rather than a real (infinitely distant) star is proportional to the five-thirds power of the telescope aperture. This understanding of the physics is used to demonstrate continuous, real-time atmospheric compensation of a 1.5-m telescope using a high-pulse-rate laser, pulse-synchronized wavefront sensor, and deformable mirror. The 1.3-arcsec binary star 53 Xi Ursa Majoris is resolved in an exposure time of only one second.
Ameer George A.
Boeke B. R.
Browne Stephen L.
Fried David L.
Fugate Robert Q.
No associations
LandOfFree
Measurement of atmospheric wavefront distortion using scattered light from a laser guide-star does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Measurement of atmospheric wavefront distortion using scattered light from a laser guide-star, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Measurement of atmospheric wavefront distortion using scattered light from a laser guide-star will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1341543