E-ELT M5 field stabilisation unit scale 1 demonstrator design and performances evaluation

J. M. Casalta; J. Barriga; J. Ariño; J. Mercader; M. San Andrés; J. Serra; I. Kjelberg; N. Hubin; L. Jochum; E. Vernet; M. Dimmler; M. Müller

doi:10.1117/12.857078

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27 July 2010 E-ELT M5 field stabilisation unit scale 1 demonstrator design and performances evaluation

J. M. Casalta; J. Barriga; J. Ariño; J. Mercader; M. San Andrés; J. Serra; I. Kjelberg; N. Hubin; L. Jochum; E. Vernet; M. Dimmler; M. Müller

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Proceedings Volume 7736, Adaptive Optics Systems II; 77360M (2010) https://doi.org/10.1117/12.857078
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

Abstract

The M5 Field stabilization Unit (M5FU) for European Extremely Large Telescope (E-ELT) is a fast correcting optical system that shall provide tip-tilt corrections for the telescope dynamic pointing errors and the effect of atmospheric tiptilt and wind disturbances. A M5FU scale 1 demonstrator (M5FU1D) is being built to assess the feasibility of the key elements (actuators, sensors, mirror, mirror interfaces) and the real-time control algorithm. The strict constraints (e.g. tip-tilt control frequency range 100Hz, 3m ellipse mirror size, mirror first Eigen frequency 300Hz, maximum tip/tilt range ± 30 arcsec, maximum tiptilt error < 40 marcsec) have been a big challenge for developing the M5FU Conceptual Design and its scale 1 demonstrator. The paper summarises the proposed design for the final unit and demonstrator and the measured performances compared to the applicable specifications.

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J. M. Casalta, J. Barriga, J. Ariño, J. Mercader, M. San Andrés, J. Serra, I. Kjelberg, N. Hubin, L. Jochum, E. Vernet, M. Dimmler, and M. Müller "E-ELT M5 field stabilisation unit scale 1 demonstrator design and performances evaluation", Proc. SPIE 7736, Adaptive Optics Systems II, 77360M (27 July 2010); https://doi.org/10.1117/12.857078

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