基于液晶材料的光束偏转系统具有高精度、低功耗、系统轻便、可随机指向等优点。介绍了该技术国内外研究动态；详细阐述了基于液晶材料光束偏转系统的基本原理、性能指标、研究进展及发展瓶颈；介绍了液晶材料与大角度步进器件组合使用实现大视场角光束偏转的几种新型技术；综合比较评价了各种液晶光束偏转技术发展前景；对新型液晶光束偏转技术发展方向作了展望。

Liquid crystal based beam steering technology has advantages of high accuracy，low power consumption and random-access pointing etc. Firstly, the worldwide research status was introduced. Secondly, the basic principle and performance indexes，in company with the research progress and bottleneck, of beam steering system based on liquid crystal were described in detail. Combining liquid crystal material with wide-angle step-steering devices, a few techniques for wide-angle beam steering were compared. Finally, the development trend of novel liquid crystal based beam steering technology was previewed.