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27 July 2010 E-ELT M5 field stabilisation unit scale 1 demonstrator design and performances evaluation
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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.
© (2010) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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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