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Proceedings Paper

Optical design for the adaptive secondary setup and instrument stimulator (ASSIST)
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Paper Abstract

A comprehensive suite of Adaptive Optics systems and AO-assisted instruments is currently under development for the VLT and will be built around a hyperbolic convex adaptive Deformable Secondary Mirror (DSM). In telescopes with such a secondary mirror, test and calibration of both the DSM and the science instruments using it are notoriously expensive and time-consuming. The Adaptive Secondary Setup and Instrument Stimulator (ASSIST) is being developed to allow test and integration of three key elements of the future VLT Adaptive Telescope Facility: the DSM and 2 instrument-specific adaptive optics systems (GALACSI for MUSE and GRAAL for HAWK-I). The core of ASSIST is a standalone interferometric test setup for the DSM allowing its test at its center of curvature (significantly reducing the size of the classical hyperbole focii test configuration). This setup is completed by a star simulator for both natural and laser guide stars, a turbulence generator (for realistic AO performance measurements), a corrector system generating a VLT-like exit pupil and a Nasmyth rotator simulator interfacing with the two AO systems. In this paper we present the optical architecture of ASSIST, detailing the current design of the different parts of the system, and discuss its projected performance and compliance with the test and calibration requirements.

Paper Details

Date Published: 31 August 2006
PDF: 15 pages
Proc. SPIE 6288, Current Developments in Lens Design and Optical Engineering VII, 62880C (31 August 2006); doi: 10.1117/12.680560
Show Author Affiliations
Pascal Hallibert, Leiden Observatory (Netherlands)
Robin Arsenault, European Southern Observatory (Germany)
Bernard Delabre, European Southern Observatory (Germany)
Simone Esposito, Osservatorio Astrofisico di Arcetri (Italy)
Norbert Hubin, European Southern Observatory (Germany)
Andreas Quirrenbach, Leiden Observatory (Netherlands)
Armando Riccardi, Osservatorio Astrofisico di Arcetri (Italy)
Stefan Stroebele, European Southern Observatory (Germany)
Remko Stuik, Leiden Observatory (Netherlands)
Ramon Vink, Leiden Observatory (Netherlands)


Published in SPIE Proceedings Vol. 6288:
Current Developments in Lens Design and Optical Engineering VII
Pantazis Z. Mouroulis; Warren J. Smith; R. Barry Johnson, Editor(s)

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