28 July 2014 The fiber positioner for 4MOST: exploration of an alternative R-θ design
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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.
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Allar Saviauk, Allar Saviauk, Frank Dionies, Frank Dionies, Roelof de Jong, Roelof de Jong, Roger Haynes, Roger Haynes, Ian Parry, 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); doi: 10.1117/12.2056289; https://doi.org/10.1117/12.2056289
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