Three-dimensional high-order wavefront sensing, anisoplanatism, and evaluation of the feasibility of solar MCAO

Details Three-dimensional high-order wavefront sensing, anisoplanatism, and evaluation of the feasibility of solar MCAO Three-dimensional high-order wavefront sensing, anisoplanatism, and evaluation of the feasibility of solar MCAO

Feb 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004spie.5171..187l&link_type=abstract

Telescopes and Instrumentation for Solar Astrophysics. Edited by Fineschi, Silvano; Gummin, Mark A. Proceedings of the SPIE,

Astronomy and Astrophysics

Astrophysics

2

Scientific paper

Multiconjugate adaptive optics has been proposed in order to extend the size of the corrected field of view with respect to the classical AO field of view. In order to achieve this, a three dimensional measurement of the turbulent volume is needed to collect the information to command the several deformable mirrors. This can be done by using tomography, in which several WFS are used, each of them coupled to a sky region. Here we report the experimental demonstration of such evaluation for solar observations. In addition, we confront these results on turbulence distribution with a study of AO corrected images by using multi point large field of view wavefront sensing with the new Dunn Solar Telescope adaptive optics system. This yields to information on the AO system performances and provide useful estimate of the PSF variation across the field. The results from this article provides an important step forward for building a full solar multi-conjugate adaptive optics system for the Dunn Solar Telescope and in a longer term for the future 4 meter ATST telescope.

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