液晶消色差偏振旋转器

杨艳灵; 张弛; 孙岩; 马红梅; 孙玉宝

doi:10.3788/YJYXS20193412.1131

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液晶消色差偏振旋转器

材料与器件 | 更新时间：2020-07-16

- 液晶消色差偏振旋转器
- Liquid crystal achromatic polarization rotator
- 液晶与显示 2019年34卷第12期页码：1131-1135
- 作者机构：
  
  河北工业大学应用物理系, 天津 300401
- 作者简介：
  
  [ "杨艳灵(1994—), 女, 河北衡水人, 硕士研究生, 2017年于邢台学院获得学士学位, 主要从事液晶器件方面的研究。E-mail:597266467@qq.com" ]
  [ "孙玉宝(1975—), 男, 河北沧州人, 教授, 2010年于河北工业大学获得博士学位, 主要从事液晶显示器件方面的研究。E-mail:sun_yubao@163.com" ]
- 基金信息：
  
  国家自然科学基金(61475042);国家重点研发计划(2018YFB0703701)
- DOI：10.3788/YJYXS20193412.1131
  中图分类号： TN27
- 收稿日期：2019-07-18，
  
  录用日期：2019-9-15，
  
  纸质出版日期：2019-12-05
- 稿件说明：
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杨艳灵, 张弛, 孙岩, 等. 液晶消色差偏振旋转器[J]. 液晶与显示, 2019,34(12):1131-1135.

Yan-ling YANG, Chi ZHANG, Yan SUN, et al. Liquid crystal achromatic polarization rotator[J]. Chinese journal of liquid crystals and displays, 2019, 34(12): 1131-1135.
杨艳灵, 张弛, 孙岩, 等. 液晶消色差偏振旋转器[J]. 液晶与显示, 2019,34(12):1131-1135. DOI： 10.3788/YJYXS20193412.1131.

Yan-ling YANG, Chi ZHANG, Yan SUN, et al. Liquid crystal achromatic polarization rotator[J]. Chinese journal of liquid crystals and displays, 2019, 34(12): 1131-1135. DOI： 10.3788/YJYXS20193412.1131.

摘要

液晶消色差偏振旋转器是一种可以改变入射偏振光状态的光学元件。为了在不移动偏振器件的情况下，实现偏振光在正交方向的转变，并在宽波段具有良好的消色差特性，本文提出了一种由3个低扭曲向列相液晶盒组成的消色差偏振旋转器，通过施加电压来控制液晶分子分布从而控制偏振光的状态。用TechWiz LCD 1D软件进行模拟，在不加电压和平行偏光片情况下，消色差偏振旋转器在450~650 nm范围内的漏光率小于0.01，可见光范围内的漏光率低于4.5%，与传统的一个扭曲向列相液晶盒组成的旋转器相比漏光率较低。施加电压之后，透过率可达到97.9%以上，并且液晶盒厚度在2.2~2.5 μm之间变化时，消色差特性几乎不受影响，这种结构的消色差偏振旋转器的对比度较高，消色差性能良好，响应时间快，达到了偏振旋转器件的要求。

Abstract

Liquid crystal achromatic polarization rotator is an optical element which can change the state of incident polarized light. In order to realize the transformation of polarized light in orthogonal direction and have good achromatic performance in wide band without moving polarizing components

an achromatic polarization rotator composed of three low-twisted nematic liquid crystal cells is proposed to control the distribution of liquid crystal molecules by applying voltage to control the state of the polarized light. TechWiz LCD 1D software is used for simulation. In the case of no voltage and parallel polarizer

the light leakage rate of the chromatic polarization rotator in the range of 450~650 nm is less than 0.01

and the light leakage rate in the range of visible light is less than 4.5%

which is lower than that of the rotator composed of a traditional twisted nematic liquid crystal cell. When the voltage is applied

the transmittance can reach more than 97.9%

and when the thickness of the liquid crystal cell changes between 2.2~2.5 μm

the achromatic characteristic is almost unaffected. This structure of achromatic polarization rotator has high ratio

good achromatic performance and fast response time which meets the requirements of polarization rotator devices.

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references

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