Model-based Control in Adaptive Optics Systems

Adaptive optics (AO), also called as Smart Optics, has received increasing attention in the past decades. The main idea behind AO is to actively sense and compensate the optical aberration in the system such that the image resolution is improved or the light beam is well focused. The applications of AO include ground-based telescopes, scanning-type microscopes, laser systems, human vision correction, etc. It has been demonstrated that the performance of AO systems are improved by model-based control,but there is still room for further performance improvement. As shown in the thesis, the residual wavefront error is further reduced and the convergence speed is improved by accurately modeling the hysteresis, dynamics and nonlinearity in the AO systems and sophisticated model-based controller design, either with or without a wavefront-sensor.Delft Center for Systems and ControlMechanical, Maritime and Materials Engineerin