Mechanical design and testing of the cryogenic pick-off arms for the VLT KMOS

Richard J. Bennett; George H. Davidson; Philip Rees; Stephen P. Todd

doi:10.1117/12.787891

23 July 2008 Mechanical design and testing of the cryogenic pick-off arms for the VLT KMOS

Richard J. Bennett, George H. Davidson, Philip Rees, Stephen P. Todd

Proceedings Volume 7018, Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation; 70182A (2008) https://doi.org/10.1117/12.787891
Event: SPIE Astronomical Telescopes + Instrumentation, 2008, Marseille, France

Abstract

This paper describes the mechanical design of the KMOS pick-off arms and the way in which the design is driven by combinations of requirements. The use of a recirculating linear bearing in a cryogenic environment is novel and the qualification of this component is described. Novel use is made of a single leadscrew with two leads to move optical components at different speeds to maintain the optical path length. Cryogenic flexure, repeatability and torque tests are described.

Citation Download Citation

Richard J. Bennett, George H. Davidson, Philip Rees, and Stephen P. Todd "Mechanical design and testing of the cryogenic pick-off arms for the VLT KMOS", Proc. SPIE 7018, Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation, 70182A (23 July 2008); https://doi.org/10.1117/12.787891

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