液晶光楔阵列调制光束偏转研究  

Modulated Beam Deflection by Liquid Crystal Optical Wedge Arrays

作　　者：曹凡 徐律涵 刘志强 叶茂 Cao Fan;Xu Lihan;Liu Zhiqiang;Ye Mao(School of Optoelectronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu 611731,Sichuan,China)

机构地区：[1]电子科技大学光电科学与工程学院,四川成都611731

出　　处：《光学学报》2024年第14期243-249,共7页Acta Optica Sinica

摘　　要：利用液晶材料可电控调制折射率的特性,设计一种新的电极结构,并利用液晶材料的线性响应区,通过在不同区域施加不同的电压组合,在工作区域形成不同的倾斜直线电压分布。通过采集干涉图并利用Zernike多项式进行波前重构,结果表明制备的液晶光楔阵列器件可以实现单独调制光束的偏转。Objective Traditional beam deflection systems usually employ prisms to control the beam directions,but the prisms are fixed to the beam deflection direction.To this end,the researchers adopt multiple prisms to rotate to achieve different beam deflection directions,which requires the utilization of stepper motors to control the device movement,but the system is bulky and complicated to control.After discovering the property that liquid crystal materials can electrically modulate the refractive index,increasingly more liquid crystal materials are leveraged to make optical devices whose optical properties can be electrically modulated,including liquid crystal displays,liquid crystal lenses,and liquid crystal light wedges.Liquid crystal optical wedge devices can deflect a light beam in any direction by applying a specific combination of voltages to form a linear voltage distribution in the device workspace.However,optical devices can only realize a specific function,and there is an urgent need to develop multifunctional components that can simultaneously achieve a variety of optical operations to improve the device versatility and integration.We design a new optical wedge array structure,and each unit in the array can independently control the wavefront of the outgoing light to realize free wavefront transformation.Meanwhile,feasibility is provided for subsequent integration of large-area realization of the electronically controlled modulation of the outgoing beam to form a free wavefront.Methods The proposed array device combines the design of the electrode structure and the linear response range of the liquid crystal material to improve the device versatility and integration.By employing the designed electrode structure,different tilted linear phase distributions can be achieved in the four regions when the drive voltage is controlled in the linear response range.To measure the linear response range of the LC material,we fabricate a liquid crystal cell with one planar electrode on the inner faces of two glass subst

关 键 词：光学器件 电控调制 液晶光楔 光束偏转 

分 类 号：O435.1[机械工程—光学工程]