The adaptive optics system of the 1.5m GREGOR solar telescope: four years of operation

Thomas Berkefeld; Dirk Schmidt; Dirk Soltau; Frank Heidecke; Andreas Fischer

doi:10.1117/12.2232604

26 July 2016 The adaptive optics system of the 1.5m GREGOR solar telescope: four years of operation

Thomas Berkefeld, Dirk Schmidt, Dirk Soltau, Frank Heidecke, Andreas Fischer

Proceedings Volume 9909, Adaptive Optics Systems V; 990924 (2016) https://doi.org/10.1117/12.2232604
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

Abstract

We present the properties of the adaptive optics (AO) system of the German 1.5m solar telescope GREGOR, located on the island of Tenerife, Spain. The conventional AO system uses a correlating Shack-Hartmann-Sensor with a 92mm subaperture size and a 256-actuator stacked-piezo deformable mirror (DM). AO performance results and practical experience based on the last four years of operation are presented. A recently installed second wavefront sensor with exchangeable lenslets / subaperture sizes in combination with an EM-CCD camera is used for low light observations such as polarimetric measurements of the solar system planets. Further developments include algorithmic improvements, the use of the night-time sensor for solar (off-limb) observations and solar MCAO.

Citation Download Citation

Thomas Berkefeld, Dirk Schmidt, Dirk Soltau, Frank Heidecke, and Andreas Fischer "The adaptive optics system of the 1.5m GREGOR solar telescope: four years of operation", Proc. SPIE 9909, Adaptive Optics Systems V, 990924 (26 July 2016); https://doi.org/10.1117/12.2232604

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