Adaptive Optics for Extremely Large Telescopes 4 – Conference Proceedings
Filtering the interaction matrix in an adaptive optics system
- Author(s): Zhang, Xianyu
- Gorceix, Nicolas
- Goode, Philip
- et al.
Published Web Locationhttps://doi.org/10.20353/K3T4CP1131567
We present a method to reduce the noise in the interaction matrix by calibration of the adaptive optics system.The method utilizes a matching between the actuators on the deformable mirror and the sub-apertures on thewavefront sensor to dene a lter matrix. Then, the lter matrix is applied to the sparse interaction matrix toremove the elements that should be zero. This method is useful for high-order systems and/or noise calibrationissues. The latter case is illustrated in the problem of on-sky calibration of an adaptive secondary system on atelescope, with a natural guide star, in which the noise in the interaction matrix is increased by the eects ofthe turbulent atmosphere.