Design concepts for the EST mount

Hans J. Kärcher; Martin Süss; David Fischer

doi:10.1117/12.925159

17 September 2012 Design concepts for the EST mount

Hans J. Kärcher, Martin Süss, David Fischer

Proceedings Volume 8444, Ground-based and Airborne Telescopes IV; 84440M (2012) https://doi.org/10.1117/12.925159
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

Abstract

The EST has unique an optical layout, with an on-axis Gregorian tube system and the altitude axis behind the M1 mirror unit - a great challenge for the mount designer in regard of balancing. Three different structural design concepts and various alternatives for the bearing and drive systems were investigated. Hydrostatic bearings with direct drives are compared with roller bearings and geared drives. The influence of available bearing and drive technology were investigated by FE calculations, dynamic analysis and end-to-end simulations. The finally recommended design concept is based on large-diameter segmented roller bearings and so-called pinion motors in both axes.

Citation Download Citation

Hans J. Kärcher, Martin Süss, and David Fischer "Design concepts for the EST mount", Proc. SPIE 8444, Ground-based and Airborne Telescopes IV, 84440M (17 September 2012); https://doi.org/10.1117/12.925159

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