Basden, A. G. and Morris, T. J. and Gratadour, D. and Gendron, E. (2015) 'Sensitivity improvements for Shack-Hartmann wavefront sensors using total variation minimization.', Monthly notices of the Royal Astronomical Society., 449 (4). pp. 3537-3542.
We investigate the improvements in Shack–Hartmann wavefront sensor image processing that can be realized using total variation minimization techniques to remove noise from these images. We perform Monte Carlo simulation to demonstrate that at certain signal-to-noise levels, sensitivity improvements of up to one astronomical magnitude can be realized. We also present on-sky measurements taken with the CANARY adaptive optics system that demonstrate an improvement in performance when this technique is employed, and show that this algorithm can be implemented in a real-time control system. We conclude that total variation minimization can lead to improvements in sensitivity of up to one astronomical magnitude when used with adaptive optics systems.
|Keywords:||Instrumentation: adaptive optics, Instrumentation: detectors, Methods: numerical, Methods: statistical.|
|Full text:||(VoR) Version of Record|
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|Publisher Web site:||http://dx.doi.org/10.1093/mnras/stv617|
|Publisher statement:||This article has been accepted for publication in Monthly notices of the Royal Astronomical Society. ©: 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.|
|Date accepted:||18 March 2015|
|Date deposited:||29 June 2015|
|Date of first online publication:||09 April 2015|
|Date first made open access:||No date available|
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