Simulationon Research On Adaptive Wavefront Correction System Based On Liquid Crystal Microarray

One of the core research content of modern adaptive optics is to measure and analyze the wavefront of light, and further to find effective approaches to change and/or even correct wavefront for high performance imaging detection. The methods of direct measuring and modulating wavefront based on the adaptive opto-electronic systems, can effectively simplify the pre- and post-processing operation of conventional optical systems, and thus demonstrate some particular merits compared to traditional optical systems, which can be widely used in fields such as high resolution imaging detection, high energy density laser transmission, beam shaping, and so on.In optical imaging detection, disturbances from circumstance factors such as atmospheric turbulence, temperature field change, and dense dust particle distribution, result in bad phenomenon of the wavefront scatting and distorting during propagation circumstance field, and then cause phase distortions, and thus decrease imaging resolution and imaging quality. Adaptive optics systems based upon wavefront modulation, combined with matching algorithm, can efficiently decrease or even completely eliminate disturbances from circumstance factors.Currently, common deformable mirrors have been widely used in wavefront correction systems to correct wavefront distortion from atmospheric disturbances, and remarkably improved imaging quality. As the development of MEMS technology, the weight and feature size of deformable mirrors have gradually decreased, and then power consumption is also lowered considerably. But disadvantages such as complex controlling, slow response, poor stability, limited degrees of working freedom, much great mechanical inertia, complex optical system, being unable to work in propagation way, still exist, and thus the systems with deformable mirror can't meet the highly efficient imaging demands of smart imaging.This thesis presents a new adaptive correction method, that is to use transmission-type electronically controlled liquid crystal microlens array to perform wavefront measurement and further correction. Combining project requirements, the computer simulation is used to validate the feasibility of the scheme, and therefore predict the correction power and adjustment ability of the technique. The results show the effectiveness of the scheme.