由于特种光束的独特性质和丰富应用，光场调控技术近年来得到了越来越广泛的关注。设计特定结构调控普通高斯光束的振幅、相位或偏振方向，可以得到一系列特殊光场。利用一种偏振敏感的光取向材料，基于动态缩微投影曝光系统的液晶光控取向技术，可实现精确、任意和可重构的液晶方位角的取向控制。基于该项技术制备了二值或渐变的液晶微结构元件，对入射光场的各个参量维度进行调控，产生了高品质、高效率的涡旋光束、矢量光束和艾里光束。利用该项技术制备的器件具有成本低廉、轻便集成、电光可调、偏振可控和宽波段适用等特点。综述了本课题组近期在该领域的系列研究工作，或将为光场调控技术带来全新的可能，为液晶光学器件带来更广泛的应用。

Recently, optical beam shaping has attracted intensive attention due to the fantastic properties and various applications of specific beams. These beams can be converted from Gaussian beams through particular spatial amplitude, phase or polarization control. In this work, a liquid crystal photopatterning technique based on dynamic microlithography with a polarization-sensitive photoalignment agent is presented. This technique enables the accurate, arbitrary and reconfigurable azimuthal angle control of liquid crystals, thus supplies a powerful approach for the tailoring of arbitrary fine microstructures with binary or continuously space-variant liquid crystal azimuthal orientations. Based on this technique, high quality vortex beams, vector beams and Airy beams are generated. Besides high efficiency, good electrical switchability and broad wavelength tolerance, the proposed devices also exhibit merits of compact size, low cost, dynamic mode conversion, and polarization controllable energy distribution. In this paper, our recent work on some specially designed patterns and corresponding specific optical fields is briefly reviewed. It may pave a bright way towards beam shaping and bring new possibilities for advanced liquid crystal photonic devices.