Issue |
Astron. Astrophys. Suppl. Ser.
Volume 133, Number 3, December II 1998
|
|
---|---|---|
Page(s) | 427 - 430 | |
DOI | https://doi.org/10.1051/aas:1998332 | |
Published online | 15 December 1998 |
Efficiency of off-axis astronomical adaptive systems: Comparison of theoretical and experimental data
1
Instituto de Astronomía, UNAM AP 70-264 Cd. Universitaria, 04510 Mexico D.F., Mexico
2
Département d'Astrophysique UMRA 6525, Université de Nice-Sophia Antipolis CNRS, Parc Valrose, 06108 Nice Cedex 2, France
Send offprint request to: V.G. Orlov
Received:
30
March
1998
Accepted:
30
June
1998
The efficiency of off-axis adaptive astronomical systems is estimated
using both the theoretical Hufnagel model and recently obtained experimental
profiles. The efficiency of interest is considered through the
Strehl ratio of the corrected image. The experimental
profile
used in calculations is a result of measurements carried out at the
Observatorio Astronomica Nacional at San Pedro Mártir (Mexico). It is
found that there is a significant difference in the efficiency calculated
from both profiles because they differ strongly in structure. The
experimental one has a pronounced layered structure with a great amount of
the turbulence strength concentrated near the ground, while the theoretical
profile suggests more smooth behavior of
with altitude.
Key words: atmospheric effects / telescope / instrumentation: adaptive optics
© European Southern Observatory (ESO), 1998