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Fabrication of slanted liquid crystal/polymer volume grating applied to augmented reality
- Chinese Journal of Liquid Crystals and Displays Vol. 35, Issue 10, Pages: 1012-1018(2020)
- 作者机构：
1.长春理工大学 光电工程学院, 吉林 长春 130022
2.浙江水晶光电科技股份有限公司 中央研究院, 浙江 台州 318015
3.中国科学院 长春光学精密机械与物理研究所 应用光学国家重点实验室, 吉林 长春 130033
- 作者简介：
- 基金信息：Key Project of Basic Strengthening of the Science and Technology Commission of the Military Commission(2019-JCJQ-ZD-320-00);Key Project of National Natural Science Foundation of China(U1937201)
DOI：10.37188/YJYXS20203510.1012
CLC： O753.2;TP217Received：08 April 2020，
Revised：06 May 2020，
Accepted：06 May 2020，
Published：05 October 2020
- 稿件说明：
移动端阅览
Ming-huan LIU, Xiu-hua FU, Fei WANG, et al. Fabrication of slanted liquid crystal/polymer volume grating applied to augmented reality[J]. Chinese journal of liquid crystals and displays, 2020, 35(10): 1012-1018.
Ming-huan LIU, Xiu-hua FU, Fei WANG, et al. Fabrication of slanted liquid crystal/polymer volume grating applied to augmented reality[J]. Chinese journal of liquid crystals and displays, 2020, 35(10): 1012-1018. DOI： 10.37188/YJYXS20203510.1012.
摘要
体光栅波导作为实现增强现实显示的一种方案，其核心是体光栅的制备。本工作提出了一种简单，易于搭建的非对称曝光的光路，制备的倾斜体光栅衍射效率高达80%。使用632.8 nm He-Ne激光监测光栅的演化过程，结果表明光栅在25 s内反应结束，形成光栅。SEM图像证明了光栅的倾斜特性，并与理论计算结果一致。制备的倾斜体光栅的衍射效率失谐曲线与耦合波理论取得了良好的一致性，其半高宽为3.22°。倾斜体光栅可以被外界电场调谐，90%以及10%调谐场强分别为5.1 V/
μ
m以及11.25 V/
μ
m。本工作对倾斜/液晶聚合物体光栅的制备提供了积极的指导和借鉴。
Abstract
Volume grating waveguide as a solution to realize augmented reality display
its core is the fabrication of volume grating. This work proposes a simple
easy-to-build asymmetric exposure optical path with a diffraction efficiency of up to 80% for the fabricated slanted volume grating. A 632.8 nm He-Ne laser was used to monitor the evolution of the grating. The results showed that the grating reaction was completed within 25 s
forming the resulting grating. The SEM image proves the tilt characteristics of the grating and is consistent with the theoretical calculation results. The diffraction efficiency detuning curve of the fabricated slanted volume grating shows a good agreement with the coupled wave theory
and its FWHM is 3.22°. The slanted volume grating can be switched by an external electric field. The 90% and 10% switching field strengths are 5.1 V/
μ
m and 11.25 V/
μ
m
respectively. This work provides positive guidance and reference for the fabrication of slanted liquid crystal/polymer volume gratings.
关键词
Keywords
references
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