22 July 2016 Active optics system for the 4m telescope of the Eastern Anatolia Observatory (DAG)
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Abstract
An active optics system is being developed by AMOS for the new 4m-class telescope for the Turkish Eastern Anatolia Observatory (DAG). It consists in (a) an adjustable support for the primary mirror and (b) two hexapods supporting M2 and M3. The M1 axial support consists of 66 pneumatic actuators (for mirror shape corrections) associated with 9 hydraulic actuators that are arranged in three independent circuits so as to fix the axial position of the mirror. Both M1 support and the hexapods are actively controlled during regular telescope operations, either with look-up tables (openloop control) or using optical feedback from a wavefront sensor (closed-loop control).
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Gregory P. Lousberg, Emeric Mudry, Christian Bastin, Jean-Marc Schumacher, Eric Gabriel, Olivier Pirnay, Carlo Flebus, "Active optics system for the 4m telescope of the Eastern Anatolia Observatory (DAG)", Proc. SPIE 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II, 99126F (22 July 2016); doi: 10.1117/12.2234261; https://doi.org/10.1117/12.2234261
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