Vibration control for the ARGOS laser launch path

摘要

Present and future adaptive optics systems aim for the correction of the atmospheric turbulence over a largefield of view combined with large sky coverage. To achieve this goal the telescope is equipped with multiple laserbeacons. Still, to measure tip-tilt aberrations a natural guide star is used. For some fields such a tilt-star is notavailable and a correction on the laser beacons alone is applied. For this method to work well the laser beaconsmust not be affected by telescope vibrations on their up-link path.For the ARGOS system the jitter of the beacons is specified to be below 0.05. To achieve this goal a vibration compensation system is necessary to mitigate the mechanical disturbances. The ARGOS vibration compensation system is an accelerometer based feed forward system. The accelerometer measurements are fed into a real time controller. To achieve high performance the controller of the system is model based. The output is applied to a fast steering mirror. This paper presents the concept of the ARGOS vibration compensation, the hardware, and laboratory results.© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.