Dark tip-tilt sensing

Date Issued
2016
Author(s)
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DOI
Abstract
Dark wavefront sensing in its simplest and more crude form is a quad-cell with a round spot of dark ink acting as occulting disk at the center. This sensor exhibits fainter limiting magnitude than a conventional quad-cell, providing that the size of the occulting disk is slightly smaller than the size of the spot and smaller than the residual jitter movement in closed loop. We present simulations focusing a generic Adaptive Optics system using Natural Guide Stars to provide the tip-tilt signal. We consider a jitter spectrum of the residual correction including amplitudes exceeding the dark disk size.

Coverage
Adaptive Optics Systems V
All editors
Marchetti, Enrico; Close, Laird M.; Véran, Jean-Pierre
Series
Volume
9909
Start page
99096J
Conferenece
Adaptive Optics Systems V
Conferenece place
Edinburgh, UK
Conferenece date
26 June-1 July, 2016
Uri
Url
Issn Identifier
0277-786X
Ads BibCode
2016SPIE.9909E..6JA
Rights
open.access
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