Optimization of model wavefront-sensorless adaptive optics system based on eigenmodes of deformable mirror

Abstract

It is important for the convergence of model wavefront-sensorless (WFSless) adaptive optics (AO) system that how to generate base functions and their numbers of order. The convergence speed of model WFSless AO system depends on the number of eigenmodes when eigenmodes of deformable mirrors (DM) are used as base functions of model WFSless AO system. In practice, lower order aberrations occupy the majority. In order to accelerate the convergence rate of model WFSless AO system, this paper uses partial low-order modes of eigenmodes as base functions of the system to analyze its convergence speed and correction capability. Simulation results demonstrate that the convergence speed of the system is improved to a certain extent regardless of the intensity of turbulence when the correct ion effect reaches 80% of all-order modes of eigenmodes. For the same wavefront aberration, the more the number of actuators is, the bigger the optimization of the convergence rate of the model WFSless AO system is.