Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Accuracy of Shack-Hartmann wavefront sensor using a coherent wound fibre
  image bundle   Shack-Hartmann wavefront sensors using wound fibre bundles are desired for
multi-object adaptive optical systems to provide large multiplex positioned by
Starbugs. The use of the large-sized wound fibre bundle provides the exibility
to use more sub-apertures wavefront sensor for ELTs. These compact wavefront
sensors take advantage of large focal surfaces such as the Giant Magellan
Telescope. The focus of this paper is to study the wound fibre image bundle
structure defects effect on the centroid measurement accuracy of a
Shack-Hartmann wavefront sensor. We use the first moment centroid method to
estimate the centroid of a focused Gaussian beam sampled by a simulated bundle.
Spot estimation accuracy with wound fibre image bundle and its structure impact
on wavefront measurement accuracy statistics are addressed. Our results show
that when the measurement signal to noise ratio is high, the centroid
measurement accuracy is dominated by the wound fibre image bundle structure,
e.g. tile angle and gap spacing. For the measurement with low signal to noise
ratio, its accuracy is influenced by the read noise of the detector instead of
the wound fibre image bundle structure defects. We demonstrate this both with
simulation and experimentally. We provide a statistical model of the centroid
and wavefront error of a wound fibre image bundle found through experiment.

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The categories of this paper are: solv-int
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The categories of this paper are: comp-gas
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
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The categories of this paper are: q-bio
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-fin
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The categories of this paper are: funct-an
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The categories of this paper are: cmp-lg
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The categories of this paper are: eess
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The categories of this paper are: alg-geom
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The categories of this paper are: nlin
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The categories of this paper are: q-alg
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The categories of this paper are: acc-phys
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The categories of this paper are: dg-ga
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The categories of this paper are: bayes-an