EDP Sciences
Free access
Issue
A&A
Volume 399, Number 3, March I 2003
Page(s) 1177 - 1181
Section Physical and chemical processes
DOI http://dx.doi.org/10.1051/0004-6361:20021851


A&A 399, 1177-1181 (2003)
DOI: 10.1051/0004-6361:20021851

Effect of scintillations in curvature sensing

V. V. Voitsekhovich and L. J. Sánchez

Instituto de Astronomía - UNAM, Apdo. Postal 70-264, Cd. Universitaria, 04510 México D.F., México
    e-mail: leonardo@astroscu.unam.mx
(Received 13 August 2002 / Accepted 7 November 2002 )

Abstract
The effect of scintillations on the curvature sensing which is used in astronomic adaptive systems is investigated. It is shown that the magnitude of the effect depends on two atmospheric turbulence parameters: on the Fried parameter which characterizes the seeing conditions, and on the turbulence inner scale which is responsible for small-sized turbulence inhomogeneities. Depending on the turbulence conditions, the magnitude of the effect ranges from 3% to 20%, while for the typical ones it is of the order of 10%-15%.


Key words: atmospheric effects -- instrumentation: adaptive optics -- instrumentation: high angular resolution

Offprint request: V. V. Voitsekhovich, voisteko@astroscu.unam.mx




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