The fiber positioner for 4MOST: exploration of an alternative R-θ design

Allar Saviauk; Frank Dionies; Roelof de Jong; Roger Haynes; Ian Parry

doi:10.1117/12.2056289

28 July 2014 The fiber positioner for 4MOST: exploration of an alternative R-θ design

Allar Saviauk, Frank Dionies, Roelof de Jong, Roger Haynes, Ian Parry

Proceedings Volume 9151, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation; 91514Y (2014) https://doi.org/10.1117/12.2056289
Event: SPIE Astronomical Telescopes + Instrumentation, 2014, Montréal, Quebec, Canada

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.

Citation Download Citation

Allar Saviauk, Frank Dionies, Roelof de Jong, Roger Haynes, and Ian Parry "The fiber positioner for 4MOST: exploration of an alternative R-θ design", Proc. SPIE 9151, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation, 91514Y (28 July 2014); https://doi.org/10.1117/12.2056289

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