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Proceedings Paper

Miniaturized Shack-Hartmann wavefront sensors for starbugs
Author(s): Michael Goodwin; Samuel Richards; Jessica Zheng; Jon Lawrence; Sergio Leon-Saval; Alexander Argyros; Belen Alcalde
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Paper Abstract

The ability to position multiple miniaturized wavefront sensors precisely over large focal surfaces are advantageous to multi-object adaptive optics. The Australian Astronomical Observatory (AAO) has prototyped a compact and lightweight Shack-Hartmann wavefront-sensor that fits into a standard Starbug parallel fibre positioning robot. Each device makes use of a polymer coherent fibre imaging bundle to relay an image produced by a microlens array placed at the telescope focal plane to a re-imaging camera mounted elsewhere. The advantages of the polymer fibre bundle are its high-fill factor, high-throughput, low weight, and relatively low cost. Multiple devices can also be multiplexed to a single lownoise camera for cost efficiencies per wavefront sensor. The use of fibre bundles also opens the possibility of applications such as telescope field acquisition, guiding, and seeing monitors to be positioned by Starbugs. We present the design aspects, simulations and laboratory test results.

Paper Details

Date Published: 18 July 2014
PDF: 20 pages
Proc. SPIE 9151, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation, 91514T (18 July 2014); doi: 10.1117/12.2055014
Show Author Affiliations
Michael Goodwin, Australian Astronomical Observatory (Australia)
Samuel Richards, Australian Astronomical Observatory (Australia)
The Univ. of Sydney (Australia)
Jessica Zheng, Australian Astronomical Observatory (Australia)
Jon Lawrence, Australian Astronomical Observatory (Australia)
Sergio Leon-Saval, The Univ. of Sydney (Australia)
Alexander Argyros, The Univ. of Sydney (Australia)
Belen Alcalde, Australian Astronomical Observatory (Australia)

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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