Multiconjugate adaptive optics at the Vacuum Tower Telescope, Tenerife

Thomas Berkefeld; Dirk Soltau; Oskar von der Luhe

doi:10.1117/12.459799

7 February 2003 Multiconjugate adaptive optics at the Vacuum Tower Telescope, Tenerife

Thomas Berkefeld, Dirk Soltau, Oskar von der Luhe

Proceedings Volume 4839, Adaptive Optical System Technologies II; (2003) https://doi.org/10.1117/12.459799
Event: Astronomical Telescopes and Instrumentation, 2002, Waikoloa, Hawai'i, United States

Abstract

We present an overview of the optical setup and control algorithms for the multi-conjugate adaptive optics (MCAO) system of the 70cm German Vacuum Tower Telescope (VTT), Observatorio del Teide, Tenerife. The system is designed to remove the strong differential tip/tilt of the present AO system across a field of 30 arcseconds at visible wavelengths. It will consist of two Shack-Hartmann wavefront sensors (WFS) and two deformable mirrors (DM) plus a separate Tip/Tilt mirror. Both wavefront sensors will be situated in the pupil plane of the telescope. One determines the high order wavefront aberrations for the center of the field of view (FOV), the other measures only low order wavefront aberrations, but covers a large FOV in each subaperture. A 35 actuator bimorph mirror and a 37 actuator membrane mirror will correct the ground layer and the tropopause, respectively. For wavefront reconstruction, the mirror eigenmodes will be used. The system will have first light in the first quarter of 2003. Scientific operation is expected to start in April 2003 or July 2003.

Citation Download Citation

Thomas Berkefeld, Dirk Soltau, and Oskar von der Luhe "Multiconjugate adaptive optics at the Vacuum Tower Telescope, Tenerife", Proc. SPIE 4839, Adaptive Optical System Technologies II, (7 February 2003); https://doi.org/10.1117/12.459799

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