LINC-NIRVANA地面和高层WFS的校准程序
The calibration procedure of the LINC-NIRVANA ground and high layer WFS
摘要：
LINC--NIRVANA（LN）是一个MCAO模块，目前安装在大双目望远镜（LBT）的后弯格里高利焦点上。它安装了一个最初设计用于实现望远镜干涉成像焦点站的相机。LN遵循LBT双目策略，具有两个双通道：辅助双臂的双层定向多共轭自适应光学系统，提供高阶波前校正。为了平衡场旋转，对两个地波-波前传感器应用机械去旋，并且对两个高层传感器应用光学（K-镜）去旋，固定焦平面相对于波前传感器上的金字塔的位置。去旋转引入波前传感器上的光瞳图像旋转，从而改变可变形反射镜在传感器上的投影。
英文摘要：
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.
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