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The calibration procedure of the LINC-NIRVANA ground and high layer WFS
- Publication Year :
- 2018
-
Abstract
- 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.<br />Comment: 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
- Subjects :
- Astrophysics - Instrumentation and Methods for Astrophysics
Subjects
Details
- Database :
- arXiv
- Publication Type :
- Report
- Accession number :
- edsarx.1807.01657
- Document Type :
- Working Paper