基于液晶空间光调制器的程控变焦透镜  

PROGRAMMABLE ZOOM LENSES BASED ON LIQUID CRYSTAL SPATIAL LIGHT MODULATORS

作　　者：常蓝天[1] 国承山[1] 

机构地区：[1]山东师范大学物理与电子科学学院,济南250014

出　　处：《山东师范大学学报（自然科学版）》2008年第4期35-37,40,共4页Journal of Shandong Normal University(Natural Science)

基　　金：山东省自然科学基金资助项目(Y2006A20)

摘　　要：提出一种利用显示在两个程控液晶空间光调制器(LC-SLM)上的菲涅尔透镜建立程控变焦成像系统的方法.通过对该系统的理论分析,得出了成像系统的放大率与两个菲涅尔透镜焦距之间的关系式.在此基础上利用Matlab设计了系统所需要的菲涅尔透镜,对该成像系统的成像特性进行了计算机模拟研究,并讨论了LC-SLM的抽样基元大小与成像质量的关系.最后,建立了相应的光学实验装置,并给出了与计算机模拟相一致的实验结果.A method for implementing a programmable zoom lens imaging system is proposed. This system is comprised of two Fresnel lenses, which are displayed on two liquid crystal spatial light modulators （LC - SLM） respectively. Theoretical analysis for the system reveals a relationship between the magnification of the system and the focal length of the two Fresnel lenses. The Fresnel lenses are designed based on the theoretical results and the imaging processes of the system are simulated in Matlab. The influence of the sampling of the LC - SLM on the imaging quality of the system is also discussed. In the end, an experimental setup is built and some experimental results consistent with the simulation results are given.

关 键 词：空间光调制器 菲涅尔透镜 变焦系统 抽样 

分 类 号：TN201[电子电信—物理电子学]