低压驱动高阻值层液晶透镜
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摘要
针对传统电极驱动液晶透镜的电场分布在驱动电极边缘的问题,设计了一种高阻值层驱动电极来控制液晶分子偏转的低压驱动和焦距可调的液晶透镜.利用磁控溅射工艺在含镂空孔阵列的面状铝电极基板表面沉积一层掺铝氧化锌透明薄膜,形成高阻值层驱动电极;利用液晶盒成盒工艺将制备好的驱动电极基板和公共电极基板(氧化铟锡玻璃基板)组装成液晶透镜,研究掺铝氧化锌高阻值层、驱动电压、工作频率对液晶透镜光学性能的影响.实验结果表明,对比传统电极驱动液晶透镜,高阻值层电极驱动液晶透镜在驱动电压2.2Vrms和工作频率130kHz下获得的干涉圆环均匀,聚焦光斑小.同时,在驱动电压1.8～2.8Vrms和工作频率130kHz下所制备的液晶透镜焦距可调范围为4.27～2.88mm.
A liquid crystal lens with low driving and controllabe focal length were presented,which was driven by hollow-out driven-electrodes with high-resistance(H-r)layer to control the deflection of liquid crystal molecules according to the electric-filed distribution on the edge of driven-electrode of convention liquid crystal lens.Al-doped ZnO(AZO)transparent film,as the H-r layer of liquid crystal lens,was deposited on the surface of the layered aluminum(Al)electrode with hollow-hole arrays by magnetron sputtering and formed the top substrate with H-r layer driven-electrodes.The H-r liquid crystal lens was fabricated after the liquid crystal was sandwitched between the substrate with H-r driven-electrodes and a substrate with indium-tin-oxide common electrode.The effect of AZO H-r layer,driving voltage and working frequency on the optical properties of liquid crystal lens was studied.The experimental results show that the intereference patterns are uniformer and the focal radius are smaller when the driving voltage of 2.2 Vrms and working frequency of 130 kHz are applied to the fabricated H-r layer liquid crystal lens.In addition,the focal length of H-r liquid crystal lens can be adjusted from 4.27 mm to2.88 mm with the driving voltages range from 1.8 to 2.8 Vrms and working frequencies of 130 kHz.
A liquid crystal lens with low driving and controllabe focal length were presented,which was driven by hollow-out driven-electrodes with high-resistance(H-r)layer to control the deflection of liquid crystal molecules according to the electric-filed distribution on the edge of driven-electrode of convention liquid crystal lens.Al-doped ZnO(AZO)transparent film,as the H-r layer of liquid crystal lens,was deposited on the surface of the layered aluminum(Al)electrode with hollow-hole arrays by magnetron sputtering and formed the top substrate with H-r layer driven-electrodes.The H-r liquid crystal lens was fabricated after the liquid crystal was sandwitched between the substrate with H-r driven-electrodes and a substrate with indium-tin-oxide common electrode.The effect of AZO H-r layer,driving voltage and working frequency on the optical properties of liquid crystal lens was studied.The experimental results show that the intereference patterns are uniformer and the focal radius are smaller when the driving voltage of 2.2 Vrms and working frequency of 130 kHz are applied to the fabricated H-r layer liquid crystal lens.In addition,the focal length of H-r liquid crystal lens can be adjusted from 4.27 mm to2.88 mm with the driving voltages range from 1.8 to 2.8 Vrms and working frequencies of 130 kHz.
引文
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[22] WEI M W,PENG R L,TANG Z Y,et al.Study on theory and technology of low voltage variable-focus double liquid lens[J].Acta Photonica Sinica,2015,44(5):0523005.魏茂炜,彭润玲,汤征洋,等.低压双液体变焦透镜的理论及工艺研究[J].光子学报,2015,44(5):0523005.
[23] TANG X Z,ZHONG D Z,JIAN T X,et al.A design of liquid crystal lens with low voltage driving[J].Acta Physica Sinica,2013,62(16):224-229.唐先柱,钟德镇,简廷宪,等.低压驱动液晶透镜设计的研究[J].物理学报,2013,62(16):224-229.
[24] CHANG Y C,JEN T H,TING C H,HUANG Y B.High-resistance liquid-crystal lens array for rotatable 2D/3D autostereoscopic display[J].Optics Express,2014,22(3):2714-2724.
[25] HSU C J,CHAO P C P,KAO Y Y.A thin multi-ring negative liquid crystal lens enabled by high-k dielectric material[J].Microsystem Technologies.2011,17(5-7):923-929.
[2] KWON K C,ERDENEBAT M U,LIM Y T,et al.Enhancement of the depth-of-field of integral imaging microscope by using switchable bifocal liquid-crystalline polymer micro lens array[J].Optics Express,2017,25(24):30503-30512.
[3] LIANG D,WANG Q H.Liquid crystal microlens array using double lenticular electrodes[J].Journal of Display Technology,2013,9(10):814-818.
[4] PENG H,NAIR D P,KOWALSKI B A,et al.High performance graded rainbow holograms via two-stage sequential orthogonal thiol–click chemistry[J].Macromolecules,2014,47(7):2306-2315.
[5] KOBAYASHI Y,ABE J.Real-time dynamic hologram of a 3Dobject with fast photochromic molecules[J].Advanced Optical Materials,2016,4(9):1354-1357.
[6] PENG H,BI S,NI M,et al.Monochromatic visible light“photoinitibitor”:janus-faced initiation and inhibition for storage of colored 3Dimages[J].Journal of the American Chemical Society,2014,136(25):8855-8858.
[7] YANG Lan,CAI Xiao-mei,ZHOU Xiong-tu,et al.Design and optimization of round hole LCD lens based on ZEMAX[J].Chinese Journal of Luminescence,2017,38(12):1688-1694.杨兰,蔡晓梅,周雄图,等.圆孔液晶透镜的ZEMAX设计与优化[J].发光学报,2017,38(12):1688-1694.
[8] XIAO Feng,KONG Ling-jiang,AI Yue.A liquid crystal lens with tunable focal length based on principle of optical phased array technology[J].Acta Optica Sinica,2012,32(12):286-291.肖锋,孔令讲,艾越.一种基于光学相控阵技术的可变焦液晶透镜实现方法[J].光学学报,2012,32(F12):286-291.
[9] JAMALI A,BRYANT D,ZHANG Y,et al.Design of a large aperture tunable refractive Fresnel liquid crystal lens[J].Applied Optics,2018,57(7):10-19.
[10] DOU H,CHU F,GUO,Y Q,et al.Large aperture liquid crystal lens array using a composited alignment layer[J].Optics Express,2018,26(7):9254-9262.
[11] CHANG Y C,JEN T H,TING C H,et al. High-resistance liquid-crystal lens array for rotatable 2D/3D autostereoscopic display[J].Optics Express,2014,22(3):2714-2724.
[12] LIANG D,LUO J Y,ZHAO W X,WANG Q H.2D/3Dswitchable autostereoscopic display based on polymerstabilized blue-phase liquid crystal lens[J].Journal of Display Technology.2012,8(10):609-612.
[13] XU Xiao-hai,ZHANG Qing-chuan,CHENG Teng.Experiment oflight field microscopy based on micro-lens Array[J].Acta Photonica Sinica,2017,46(S1):0111002.徐小海,张青川,程腾.基于微透镜阵列的光场显微镜实验研究[J].光子学报,2017,46(S1):0111002.
[14] GALSTIAN T,SOVA O,ASATRYAN K,et al.Optical camera with liquid crystal autofocus lens[J].Optics Express,2017,25(24):29945-29964.
[15] HASSANFIROOZI A,HUANG Y P,SHIEH H P,et al.Dual layer electrode liquid crystal lens for 2D/3Dtunable endoscopy imaging system[J].Optics Express,2016,24(8):8527-5588.
[16] CHEN H S,LIN Y H.An endoscopic system adopting a liquid crystal lens with an electrically tunable depth-of-field[J].Optics Express,2013,21(15):18079-18088.
[17] LIN Y H,CHEN H S.Electrically tunable-focusing and polarizer-free liquid crystal lenses for ophthalmic applications[J].Optics Express,2013,21(8):9428-9436.
[18] SHI L Y,SRIVASTAVA A K,TAM A M W,et al.2D-3Dswitchable display based on a passive polymeric lenticular lens array and electrically suppressed ferroelectric liquid crystal[J].Optics Letters,2017,42(17):3435-3438.
[19] LIN H C,LIN Y H.A fast response and large electrically tunable-focusing imaging system based on switching of two modes of a liquid crystal lens[J].Applied Physics Letters.2010,97(6):063505.
[20] LIN Y H,CHEN M S,LIN H C.An electrically tunable optical zoom system using two composite liquid crystal lenses with a large zoom ratio[J].Optics Express,2011,19(5):4714-4121.
[21] LIN Y H,CHEN H S.Electrically tunable-focusing and polarizer-free liquid crystal lenses for ophthalmic applications[J].Optics Express,2013,21(8):9428-9436.
[22] WEI M W,PENG R L,TANG Z Y,et al.Study on theory and technology of low voltage variable-focus double liquid lens[J].Acta Photonica Sinica,2015,44(5):0523005.魏茂炜,彭润玲,汤征洋,等.低压双液体变焦透镜的理论及工艺研究[J].光子学报,2015,44(5):0523005.
[23] TANG X Z,ZHONG D Z,JIAN T X,et al.A design of liquid crystal lens with low voltage driving[J].Acta Physica Sinica,2013,62(16):224-229.唐先柱,钟德镇,简廷宪,等.低压驱动液晶透镜设计的研究[J].物理学报,2013,62(16):224-229.
[24] CHANG Y C,JEN T H,TING C H,HUANG Y B.High-resistance liquid-crystal lens array for rotatable 2D/3D autostereoscopic display[J].Optics Express,2014,22(3):2714-2724.
[25] HSU C J,CHAO P C P,KAO Y Y.A thin multi-ring negative liquid crystal lens enabled by high-k dielectric material[J].Microsystem Technologies.2011,17(5-7):923-929.