介绍了一种基于聚合物分散液晶材料的连续调焦电控透镜.在聚合物分散液晶盒的上表面电极上刻蚀圆孔，形成一个非对称电极，在液晶盒上下极板之间，诱发一个非均匀电场，从而引起聚合物分散液晶材料的折射率非均匀分布，形成电控变焦透镜.阐述了聚合物分散液晶可调焦透镜的基本原理，分析了透镜孔径对聚合物分散液晶透镜焦距的影响,在直径3 mm和6 mm的圆孔条件下，分别测量了透镜焦距随电压的变化关系.结果表明:电压从50 V加到170 V的过程中，透镜焦距逐渐减短，刻蚀3 mm圆孔的聚合物分散液晶盒焦距从1.361 63 m到0.429 21 m，刻蚀6 mm圆孔的聚合物分散液晶盒焦距从1.769 92 m到0.548 43 m.

An electrically controlled continuously focusing lens was introduced based on Polymer Dispersed Liquid Crystal (PDLC). Etching a hole on the upper surface of the electrode attaching to the PDLC cell to form an asymmetric electrode, a non-uniform electric field was induced. Then the non-uniform distribution of the refractive index in the PDLC cell was generated and a controlled zoom lens was formed. The basic principle of the focusing lens was also introduced, the effects of the lens aperture on the focal length of the PDLC lens were analyzed, and the relation between the focal length and voltage was measured with the diameter of 3 mm and 6 mm respectively. The results show that, with voltage ranging from 50 V to 170 V, the focal length of the PDLC lens was reduced from 1.361 63 m to 0.429 21 m in the diameter 3 mm or from 1.769 92 m to 0.548 43 m in the diameter 6 mm of the hole.