Multi-conjugate solar adaptive optics with the VTT and GREGOR

After the successful demonstration of the solar multi-conjugate adaptive optics (MCAO) system at the German 70cm Vacuum Tower Telescope (VTT), Observatorio del Teide, Tenerife, in the last years, we are continuing the development of the system as a testbed for the future MCAO of the 150cm GREGOR solar telescope. We describe an improved reconstruction scheme that increases the number of corrected off-axis degrees of freedom and will be tested at the VTT in September 2006. We present a modified optical setup of the GREGOR MCAO that has the advantage of being adjustable to a wide height range of the turbulence.

[1]  Sergio Chueca,et al.  Vertical structure of the turbulence above the observatories of the Canary Islands: parameters and statistics for adaptive optics , 2004, SPIE Astronomical Telescopes + Instrumentation.

[2]  Thomas Berkefeld,et al.  Multi-conjugate solar adaptive optics at the Vacuum Tower Telescope on Tenerife , 2005 .

[3]  Mark Shand,et al.  Adaptive optics system for the new Swedish solar telescope , 2003, SPIE Astronomical Telescopes + Instrumentation.

[4]  Friedrich Wöger,et al.  Adaptive optics and multi-conjugate adaptive optics with the VTT , 2002 .

[5]  Thomas Berkefeld,et al.  KAOS: Adaptive optics system for the Vacuum Tower Telescope at Teide Observatory , 2003, SPIE Astronomical Telescopes + Instrumentation.

[6]  Thomas Berkefeld,et al.  Multiconjugate adaptive optics at the Vacuum Tower Telescope, Tenerife , 2002, SPIE Remote Sensing.

[7]  Byron M. Welsh,et al.  Analysis of Multiconjugate Adaptive Optics , 1992, Adaptive Optics for Large Telescopes.

[8]  Oskar F. H. von der Luhe Photometric stability of multiconjugate adaptive optics , 2004, SPIE Astronomical Telescopes + Instrumentation.

[9]  Steve Hegwer,et al.  Optical set-up and design for solar multiconjugate adaptive optics at Dunn Solar Telescope/NSO , 2004, SPIE Astronomical Telescopes + Instrumentation.

[10]  Thomas Berkefeld,et al.  Results of the multi-conjugate adaptive optics system at the German solar telescope, Tenerife , 2005, SPIE Optics + Photonics.

[11]  Stephen L. Keil,et al.  Innovative Telescopes and Instrumentation for Solar Astrophysics , 2003 .