27 July 2016 Dark tip-tilt sensing
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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.
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Carmelo Arcidiacono, Carmelo Arcidiacono, Roberto Ragazzoni, Roberto Ragazzoni, Valentina Viotto, Valentina Viotto, Maria Bergomi, Maria Bergomi, Jacopo Farinato, Jacopo Farinato, Demetrio Magrin, Demetrio Magrin, Marco Dima, Marco Dima, Marco Gullieuszik, Marco Gullieuszik, Luca Marafatto, Luca Marafatto, } "Dark tip-tilt sensing", Proc. SPIE 9909, Adaptive Optics Systems V, 99096J (27 July 2016); doi: 10.1117/12.2232460; https://doi.org/10.1117/12.2232460
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