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Proceedings Paper

The fiber positioner for 4MOST: exploration of an alternative R-θ design
Author(s): Allar Saviauk; Frank Dionies; Roelof de Jong; Roger Haynes; Ian Parry
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Paper Abstract

We present a new type of R-θ fiber actuator named PotsPos for multi-object astronomical spectroscopy. It was initially intended to use as an alternative positioner design for the 4-meter Multi-Object Spectroscopic Telescope (4MOST). Although another tilting spine technology developed by the Australian Astronomical Observatory (AAO) is currently chosen for the 4MOST, PotsPos design has some technical advantages over other positioning technologies and might therefore be an attractive choice for future spectrographs. The design would be similar in positioning capabilities to the tilting spine design but would not suffer from telecentricity and defocus errors. The mechanical design, suitable motors, computational results from dynamic simulations and finite element analyses are presented.

Paper Details

Date Published: 28 July 2014
PDF: 12 pages
Proc. SPIE 9151, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation, 91514Y (28 July 2014); doi: 10.1117/12.2056289
Show Author Affiliations
Allar Saviauk, Leibniz-Institut für Astrophysik Potsdam (Germany)
Frank Dionies, Leibniz-Institut für Astrophysik Potsdam (Germany)
Roelof de Jong, Leibniz-Institut für Astrophysik Potsdam (Germany)
Roger Haynes, Leibniz-Institut für Astrophysik Potsdam (Germany)
Ian Parry, Univ. of Cambridge (United Kingdom)

Published in SPIE Proceedings Vol. 9151:
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation
Ramón Navarro; Colin R. Cunningham; Allison A. Barto, Editor(s)

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