Near-infrared wavefront sensing for the VLT interferometer

Stefan Hippler; Wolfgang Brandner; Yann Clénet; Felix Hormuth; Eric Gendron; Thomas Henning; Ralf Klein; Rainer Lenzen; Daniel Meschke; Vianak Naranjo; Udo Neumann; José Ricardo Ramos; Ralf-Rainer Rohloff; Frank Eisenhauer

doi:10.1117/12.789053

15 July 2008 Near-infrared wavefront sensing for the VLT interferometer

Stefan Hippler, Wolfgang Brandner, Yann Clénet, Felix Hormuth, Eric Gendron, Thomas Henning, Ralf Klein, Rainer Lenzen, Daniel Meschke, Vianak Naranjo, Udo Neumann, José Ricardo Ramos, Ralf-Rainer Rohloff, Frank Eisenhauer

Author Affiliations +

Proceedings Volume 7015, Adaptive Optics Systems; 701555 (2008) https://doi.org/10.1117/12.789053
Event: SPIE Astronomical Telescopes + Instrumentation, 2008, Marseille, France

Abstract

The very large telescope (VLT) interferometer (VLTI) in its current operating state is equipped with high-order adaptive optics (MACAO) working in the visible spectrum. A low-order near-infrared wavefront sensor (IRIS) is available to measure non-common path tilt aberrations downstream the high-order deformable mirror. For the next generation of VLTI instrumentation, in particular for the designated GRAVITY instrument, we have examined various designs of a four channel high-order near-infrared wavefront sensor. Particular objectives of our study were the specification of the near-infrared detector in combination with a standard wavefront sensing system. In this paper we present the preliminary design of a Shack-Hartmann wavefront sensor operating in the near-infrared wavelength range, which is capable of measuring the wavefronts of four telescopes simultaneously. We further present results of our design study, which aimed at providing a first instrumental concept for GRAVITY.

Citation Download Citation

Stefan Hippler, Wolfgang Brandner, Yann Clénet, Felix Hormuth, Eric Gendron, Thomas Henning, Ralf Klein, Rainer Lenzen, Daniel Meschke, Vianak Naranjo, Udo Neumann, José Ricardo Ramos, Ralf-Rainer Rohloff, and Frank Eisenhauer "Near-infrared wavefront sensing for the VLT interferometer", Proc. SPIE 7015, Adaptive Optics Systems, 701555 (15 July 2008); https://doi.org/10.1117/12.789053

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