LINC--NIRVANA (LN) is an MCAO module currently mounted on the Rear Bent Gregorian focus of the Large Binocular Telescope (LBT). It mounts a camera originally designed to realize the interferometric imaging focal station of the telescopes. LN follows the LBT binocular strategy having two twin channels: a double Layer Oriented Multi-Conjugate Adaptive Optics system assisting the two arms, supplies high order wave-front correction. In order to counterbalance the field rotation, a mechanical derotation is applied for the two ground wave-front sensors, and an optical (K-mirror) one for the two high layers sensors, fixing the positions of the focal planes with respect to the pyramids aboard the wavefront sensors. The derotation introduces a pupil images rotation on the wavefront sensors, changing the projection of the deformable mirrors on the sensor consequently.
@article{arxiv.1807.01657,
title = {The calibration procedure of the LINC-NIRVANA ground and high layer WFS},
author = {Carmelo Arcidiacono and Kalyan Kumar Radhakrishnan Santhakumari and Valentina Viotto and Maria Bergomi and Florian Briegel and Thomas Bertram and Luca Marafatto and Tom Herbst and Jacopo Farinato and Roberto Ragazzoni and Ralph Hofferbert and Martin Kuerster and Frank Kittman and Juergen Berwein and Harald Baumeister},
journal= {arXiv preprint arXiv:1807.01657},
year = {2018}
}
Comments
9 pages, 6 figures, proceeding of the SPIE Astronomical Telescopes + Instrumentation meeting, Conference Adaptive Optics Systems VI held in Austin Convention Center, Austin, Texas, United States, 10 - 15 June 2018