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Sensitivity improvements for Shack-Hartmann wavefront sensors using total variation minimisation
- Publication Year :
- 2015
-
Abstract
- We investigate the improvements in Shack-Hartmann wavefront sensor image processing that can be realised using total variation minimisation 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 realised. 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 minimisation can lead to improvements in sensitivity of up to one astronomical magnitude when used with adaptive optics systems.<br />Comment: Accepted for publication in MNRAS. Second version has type fixed (now -> not), 3rd version has corrected author list
Details
- Database :
- arXiv
- Publication Type :
- Report
- Accession number :
- edsarx.1503.06043
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1093/mnras/stv617