液晶可变延迟器相位延迟-电压曲线精确快速标定

王刚; 侯俊峰; 林佳本; 王东光; 张鑫伟

doi:doi:10.3788/ope.20202804.0827

光学精密工程, 2020, 28 (4): 827, 网络出版: 2020-07-02

液晶可变延迟器相位延迟-电压曲线精确快速标定

Accurate and fast calibration of liquid crystal variable retarder phase delay-voltage curve

论文大纲

王刚 ^1,1,2侯俊峰 ^1,1,2林佳本 ^1,2王东光 ^1,2张鑫伟 ^1,1,2

作者单位

¹ 中国科学院大学, 北京 100049

² 中国科学院中国科学院太阳活动重点实验室, 北京 100101

摘要

相位延迟-电压曲线的精确标定是向列型液晶可变相位延迟器能否实现高精度偏振测量的关键。为了提高液晶相位延迟的测量精度, 建立了一套精确高效的自动测量系统。首先, 提出了一种新的测量方法, 该方法综合了光强法、索累补偿器法以及等偏离测量技术, 可以解决现有方法测量精度低或效率低的问题。在此基础上建立了测量系统, 并利用Labview技术实现了系统的自动化测量, 进一步缩短了测量时间。最后, 对系统的测量误差、重复精度以及工作效率进行了实验验证。实验结果表明, 系统延迟测量误差小于0.057 5％λ, 重复精度小于0.019 7％λ, 可在30 min内完成100个延迟采样点的自动化测量。该系统适用于可见光范围内液晶可变延迟器相位延迟-电压曲线的精确标定。

Abstract

The accurate calibration of the phase-delay voltage curve is the key to achieving high precision polarization measurements using a nematic Liquid Crystal Phase Variable Retarder (LCVR). An accurate and efficient automatic measurement system was established to improve the accuracy of the liquid crystal retarder delay measurement. Firstly, a new measurement method was proposed, which combined the light intensity method, the Soleil compensator method, and the equal deviation measurement technology, to solve the problem of low measurement accuracy or the low efficiency of the existing methods. A measurement system was developed to overcome these challenges, and automated measurement of the system was realized by Labview technology, which further shortened the system measurement time. Finally, the experimental errors, repeatability, and the working efficiency of the system were verified experimentally. The experimental results show that the system delay measurement error is less than 0.0575%λ, the repeat accuracy is less than 0.0197%λ, and 100 delayed sampling points can be automatically measured in 30 minutes. The system is suitable for the accurate calibration of the phase delay-voltage curve of a liquid crystal variable retarder in the visible range.

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王刚, 侯俊峰, 林佳本, 王东光, 张鑫伟. 液晶可变延迟器相位延迟-电压曲线精确快速标定[J]. 光学精密工程, 2020, 28(4): 827. WANG Gang, HOU Jun-feng, LIN Jia-ben, WANG Dong-guang, ZHANG Xin-wei. Accurate and fast calibration of liquid crystal variable retarder phase delay-voltage curve[J]. Optics and Precision Engineering, 2020, 28(4): 827.

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