The wide field adaptive optics system for solar observations had been developed and put in routine operation at the 1-meter New Vacuum Solar Telescope (NVST) in Fuxian Lake, Yunnan Observatory. This system adopts the configuration based on the high order ground layer correction loop and the low order high altitude correction loop. Three correction modes, namely the conventional adaptive optics (CAO), ground layer adaptive optics (GLAO), and multi-conjugate adaptive optics (MCAO) with three layers correction, can be chosen with the science requirement. The DM for ground layer correction is inherited from the 151-element AO system, and two new DMs are added and conjugated to 2~5km and 7~10km, respectively. The opto-mechanical design allows for changing the conjugate height of the two DMs independently. Two multi-direction Shack-Hartmann wavefront sensors are employed for sensing the aberration from ground layer and high-altitudes turbulence. The control system is based on multi-core CPUs platform, which is flexible for testing various control approaches. We summarize the design and report the observational results of different correction modes.
The paper presents the first results of comparative study of the optical turbulence at the sites of the Fuxian Lake Solar Observatory (FSO) and the Baikal Astrophysical Observatory (BAO). The distributions of the probability of the Fried parameter estimated from Shack-Hartmann wavefront sensor measurements are analyzed.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.