Progress with solar multi-conjugate adaptive optics at NSO

Details Progress with solar multi-conjugate adaptive optics at NSO Progress with solar multi-conjugate adaptive optics at NSO

Jul 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006spie.6272e...5r&link_type=abstract

Advances in Adaptive Optics II. Edited by Ellerbroek, Brent L.; Bonaccini Calia, Domenico. Proceedings of the SPIE, Volume 6272

Physics

Optics

6

Scientific paper

We have implemented a MCAO experiment at the Dunn Solar Telescope. The MCAO system uses 2 deformable mirrors, one conjugated to the telescope entrance pupil and other one conjugated to a layer in the upper atmosphere. For our initial experiments we have used a staged approach in which the 97 actuator, 76 subaperture correlating Shack-Hartmann solar adaptive optics system normally operated at the DST is followed by the second DM and the tomographic wavefront sensor, which used three "solar guide stars". We have successfully and stably locked the MCAO system on solar structure. We varied the height of the upper conjugate between 3km and 9 km. A large number of images were recorded in order to evaluate the performance of the system. The data analysis is still ongoing. We present preliminary results and discuss future plans.

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