18 July 2014 Miniaturized Shack-Hartmann wavefront sensors for starbugs
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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.
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Michael Goodwin, Michael Goodwin, Samuel Richards, Samuel Richards, Jessica Zheng, Jessica Zheng, Jon Lawrence, Jon Lawrence, Sergio Leon-Saval, Sergio Leon-Saval, Alexander Argyros, Alexander Argyros, Belen Alcalde, Belen Alcalde, } "Miniaturized Shack-Hartmann wavefront sensors for starbugs", Proc. SPIE 9151, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation, 91514T (18 July 2014); doi: 10.1117/12.2055014; https://doi.org/10.1117/12.2055014
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