Physics – Optics
Scientific paper
Mar 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996optl...21..435r&link_type=abstract
Optics Letters, Volume 21, Issue 6, March 15, 1996, pp.435-437
Physics
Optics
7
Adaptive Optics, Astronomical Optics, Atmospheric And Ocean Optics, Atmospheric Turbulence, Scattering, Scattering Measurements, Wave-Front Sensing
Scientific paper
Stellar scintillations are considered noise in adaptive-optics sensors and are measured for calibration purposes only. We propose to use scintillations to provide direct instantaneous information about the structure of the atmosphere. As a result it will be possible to increase the field of view provided by adaptive optics. The scintillation pattern is created when stellar light is diffracted by high-altitude turbulence. Alternatively, this pattern can be viewed as a Laplacian of this turbulence and can thus be inverted to estimate it. The measurement is limited by the intensity and the angular size of the reference star, by the height distribution of the atmospheric turbulence, and by the detector resolution and spectral response.
Cheselka Matthew
Gershnik Eugene
Ribak Erez N.
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