Concentric Fresnel liquid crystal lens with ring bandwidth controlled by independent voltage driving

ZHAO Zhuoran; LIU Zhiqiang; YE Mao

doi:10.37188/CJLCD.2026-0047

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Concentric Fresnel liquid crystal lens with ring bandwidth controlled by independent voltage driving

Device Physics and Device Preparation | 更新时间：2026-09-12

- Concentric Fresnel liquid crystal lens with ring bandwidth controlled by independent voltage driving
- Chinese Journal of Liquid Crystals and Displays Vol. 41, Issue 5, Pages: 637-648(2026)
- 作者机构：
  
  电子科技大学光电科学与工程学院，四川成都 611731
- 作者简介：
- 基金信息：
- DOI：10.37188/CJLCD.2026-0047
  CLC： O435.1;O753.2
- CSTR：32172.14.CJLCD.2026-0047
- Received：19 March 2026，
  
  Revised：2026-04-12，
  
  Published：05 May 2026
- 稿件说明：
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ZHAO Zhuoran, LIU Zhiqiang, YE Mao. Concentric Fresnel liquid crystal lens with ring bandwidth controlled by independent voltage driving[J]. Chinese Journal of Liquid Crystals and Displays, 2026, 41(5): 637-648.
DOI：

ZHAO Zhuoran, LIU Zhiqiang, YE Mao. Concentric Fresnel liquid crystal lens with ring bandwidth controlled by independent voltage driving[J]. Chinese Journal of Liquid Crystals and Displays, 2026, 41(5): 637-648. DOI： 10.37188/CJLCD.2026-0047. CSTR： 32172.14.CJLCD.2026-0047.

摘要

针对传统菲涅耳液晶透镜外层环带带宽随环带数增加急剧减小，造成光学性能降低、有效孔径受限的问题，本研究提出一种基于叉指电极的同心圆环菲涅耳液晶透镜结构，通过独立控制各环带驱动电压拓宽外层环带带宽。将驱动电压控制在液晶线性响应区并经理论计算使各环带电压满足导数连续条件，实现抛物面电压分布。实验制备了孔径为2 mm、液晶层厚30 μm、环带带宽分别为0.4 mm、0.3 mm、0.3 mm 的液晶透镜，其外层环带较具有同等最大光焦度的双总线电压驱动结构分别增大5 μm和73 μm。偏振干涉测试表明，相位分布抛物线拟合优度高于99%，正负透镜最大相位变化分别为20.9π和22π，与理论值21.8π基本一致；光焦度在-9.7~10.1 D内连续可调，且与电压差近似呈线性关系。成像测试显示，该结构的MTF50值达0.151 cycles/pixel，优于传统双总线驱动结构的0.132 cycles/pixel，变焦成像清晰。结果表明，该设计可有效扩展外层环带带宽，实现高质量抛物相位分布与优良成像性能。

Abstract

In order to solve the problem that the bandwidth of the outer zone of traditional Fresnel liquid crystal lens decreases sharply with the increase of the number of zones， which leads to the decrease of optical quality and the limitation of effective aperture， this study proposes a concentric ring Fresnel liquid crystal lens structure which uses interdigital electrode structure to independently control the driving voltage of Fresnel zone and then control the bandwidth of Fresnel zone， in order to broaden the bandwidth of the outer zone. Firstly， the driving voltage is limited in the linear response region of liquid crystal， and the driving voltage of each ring zone satisfies the derivative continuity condition through theoretical calculation to form a parabolic voltage distribution. Subsequently， a liquid crystal lens with an aperture of 2 mm， a liquid crystal layer thickness of 30 μm and three Fresnel zones （bandwidths of 0.4 mm， 0.3 mm and 0.3 mm） was fabricated. Compared with the traditional concentric ring design with maximum power， the outer zone increased by 5 μm and 73 μm respectively. Then， the polarization interference optical path is used to collect interference fringes and extract phase information. Experiments show that the goodness of fit of lens phase distribution and parabola is more than 99%， the maximum phase variation of positive and negative lenses is 20.9π and 22π， which is highly consistent with the theoretical reference value of 21.8π， and the power can be continuously adjusted in the range of -9.7~10.1 D， and it is approximately linear with the driving voltage difference. In addition， the imaging performance of the designed Fresnel liquid crystal lens is tested and evaluated. Based on ISO12233 resolution plate， the MTF50 value is 0.151 cycles/pixel，which is higher than that of Fresnel liquid crystal lens （0.132 cycles/pixel） designed by traditional formula and driven by double bus voltage. This result proves that increasing the bandwidth of Fresnel zone on the outer layer of the lens can effectively improve its optical imaging quality. The experimental results of zoom imaging also show that the liquid crystal lens has outstanding zoom ability. This design effectively realizes the expansion of the outer ring bandwidth and the parabolic phase distribution with high quality.

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references

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