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基于LCOS的菲涅耳透镜实验测定
发表时间：2016-10-15 浏览量：2194 下载量：700
| 全部作者： | 迟卫宁，王大勇，王云新，戎路，郭莎，马思津 |
| 作者单位： | 北京工业大学应用数理学院 |
| 摘 要： | 纯相位液晶空间光调制器以硅基液晶（liquid crystal on silicon，LCOS）为基础，通过控制加载在每个像素上的电压，起到对光波波前的调制作用，成为构成实时光学信息处理、光计算等信息光学系统的关键器件，正逐步取代传统的光学元件。研究利用LCOS的可编程特性，引入相位型菲涅耳透镜，以实现光波前调制的功能。在满足采样要求的基础上，对生成的透镜分别从透镜焦距、衍射效率和成像质量三个方面进行了测定。实验结果表明，加载菲涅耳透镜纯相位液晶空间光调制器可用于变焦透镜，基本能够实现普通透镜的成像功能。基于LCOS的可编程特性，可以方便灵活地控制焦距，具有非常广阔的应用前景。 |
| 关 键 词： | 光学；波前控制；硅基液晶；相位调制；相位型菲涅耳透镜 |
| Title： | Experimental measurement of Fresnel lens based on LCOS |
| Author： | CHI Weining, WANG Dayong, WANG Yunxin, RONG Lu, GUO Sha, MA Sijin |
| Organization： | College of Applied Sciences, Beijing University of Technology |
| Abstract： | Phase-only liquid crystal spatial light modulator based on liquid crystal on silicon (LCOS) can modulate the optical wavefront pixel by pixel through the external voltage. LCOS plays an important role in optical information process and optical computation, and replaces the traditional optical elements gradually. In this paper, based on the modulation curves under the different conditions, a phase Fresnel lens is loaded onto LCOS. The sampling requirement of the lens is satisfied, and the focal length, diffraction efficiency and imaging quality of the lens are experimentally tested respectively. The experimental results show that the phase-only liquid crystal spatial light modulator can be used in the zoom lens, which can also play the function of the mirror. Due to the programmable characteristics, focal length of LCOS can be of convenient and flexible control, which has very broad application prospects. |
| Key words： | optics; wavefront control; liquid crystal on silicon; phase modulation; phase Fresnel lens |
| 发表期数： | 2016年10月第19期 |
| 引用格式： | 迟卫宁，王大勇，王云新，等. 基于LCOS的菲涅耳透镜实验测定[J]. 中国科技论文在线精品论文，2016，9（19）：2003-2010. |
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