15 July 2010 Numerical control matrix rotation for the LINC-NIRVANA multiconjugate adaptive optics system
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Abstract
LINC-NIRVANA will realize the interferometric imaging focal station of the Large Binocular Telescope. A double Layer Oriented multi-conjugate adaptive optics system assists the two arms of the interferometer, supplying high order wave-front correction. In order to counterbalance the field rotation, mechanical derotation for the two ground wave-front sensors, and optical derotators for the mid-high layers sensors fix the positions of the focal planes with respect to the pyramids aboard the wave-front sensors. The derotation introduces pupil images rotation on the wavefront sensors: the projection of the deformable mirrors on the sensor consequently change. The proper adjustment of the control matrix will be applied in real-time through numerical computation of the new matrix. In this paper we investigate the temporal and computational aspects related to the pupils rotation, explicitly computing the wave-front errors that may be generated.
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Carmelo Arcidiacono, Thomas Bertram, Roberto Ragazzoni, Jacopo Farinato, Simone Esposito, Armando Riccardi, Enrico Pinna, Alfio Puglisi, Luca Fini, Marco Xompero, Lorenzo Busoni, Fernando Quiros-Pacheco, Runa Briguglio, "Numerical control matrix rotation for the LINC-NIRVANA multiconjugate adaptive optics system", Proc. SPIE 7736, Adaptive Optics Systems II, 77364J (15 July 2010); doi: 10.1117/12.857347; https://doi.org/10.1117/12.857347
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