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Proceedings Paper

Echidna Mark II: one giant leap for 'tilting spine' fibre positioning technology
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Paper Abstract

The Australian Astronomical Observatory's 'tilting spine' fibre positioning technology has been redeveloped to provide superior performance in a smaller package. The new design offers demonstrated closed-loop positioning errors of <2.8 μm RMS in only five moves (~10 s excluding metrology overheads) and an improved capacity for open-loop tracking during observations. Tilt-induced throughput losses have been halved by lengthening spines while maintaining excellent accuracy. New low-voltage multilayer piezo actuator technology has reduced a spine's peak drive amplitude from ~150V to <10V, simplifying the control electronics design, reducing the system's overall size, and improving modularity. Every spine is now a truly independent unit with a dedicated drive circuit and no restrictions on the timing or direction of fibre motion.

Paper Details

Date Published: 22 July 2016
PDF: 12 pages
Proc. SPIE 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II, 991221 (22 July 2016); doi: 10.1117/12.2231366
Show Author Affiliations
James Gilbert, Univ. of Oxford (United Kingdom)
Australian Astronomical Observatory (Australia)
The Australian National Univ. (Australia)
Gavin Dalton, Univ. of Oxford (United Kingdom)
STFC Rutherford Appleton Lab. (United Kingdom)

Published in SPIE Proceedings Vol. 9912:
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II
Ramón Navarro; James H. Burge, Editor(s)

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