Perspecitves of liquid crystals for adpative optics applications

摘要

A comparative analysis of different electrical control methods of liquid crystal (LC) modula ors is presented, and the dualfrequency control method is considered in details. Theoretical evaluations of the s peed and LC heating using dual-frequency control are reported. Methods to optimize the control voltage parameters are described. Next, it is shown how, using specific physical LC properties, it is possible to create a LC wavefront corrector that can be controlled modally. Modal wavefront correctors for the control of both low and high order aberrations are described. We describe some novel operating cofigurations of modal LC lenses. Finally, we make some brief comparisions of nematic with ferroelectric LCs for adaptive optics.