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1.中国科学院 国家天文台, 北京 100101
2.中国科学院 中国科学院太阳活动重点实验室, 北京 100101
3.中国科学院大学, 北京 100049
[ "黄威(1993—),男,四川成都人,博士研究生,2019年于成都理工大学获得硕士学位,主要从事精密仪器控制与液晶偏振光学仪器方面的研究。E-mail:huangw@nao.cas.cn" ]
[ "林佳本(1976—),男,山东青岛人,博士,正高级工程师,2009年于中国科学院国家天文台获得博士学位,主要从事自动控制、图像处理、数据挖掘方面的研究。E-mail:jiabenlin@bao.ac.cn" ]
收稿日期:2021-12-22,
修回日期:2022-01-25,
纸质出版日期:2022-07-05
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黄威, 林佳本, 侯俊峰, 等. 空间用液晶可变相位延迟器相位延迟测试系统的电子学设计[J]. 液晶与显示, 2022,37(7):849-860.
Wei HUANG, Jia-ben LIN, Jun-feng HOU, et al. Electronic design of space-based LCVR measurement system[J]. Chinese journal of liquid crystals and displays, 2022, 37(7): 849-860.
黄威, 林佳本, 侯俊峰, 等. 空间用液晶可变相位延迟器相位延迟测试系统的电子学设计[J]. 液晶与显示, 2022,37(7):849-860. DOI: 10.37188/CJLCD.2021-0335.
Wei HUANG, Jia-ben LIN, Jun-feng HOU, et al. Electronic design of space-based LCVR measurement system[J]. Chinese journal of liquid crystals and displays, 2022, 37(7): 849-860. DOI: 10.37188/CJLCD.2021-0335.
液晶可变相位延迟器(LCVR)由于其调制速度快、重量轻、无运动部件等特点成为空间光学仪器中新的研究热点。然而,LCVR中的液晶属于高分子材料,其空间适应性有待考核验证。由于地面环境模拟试验无法同时还原太空中的所有参数,因此亟需研制一台符合卫星搭载要求的LCVR空间特性试验仪,来研究液晶器件在真实星载环境下的电光性能(相位延迟-电压曲线稳定性)。本文分析了LCVR延迟测试系统的稳定性,并给出LCVR相位延迟-电压曲线的电子学测量方案。首先使用“零点”标定法设计了高稳定度的LCVR驱动;然后使用变频误差控制法,实现了LCVR的高精度恒温控制。其中LCVR驱动稳定度达到99.3%,LCVR恒温精度最高达到(35±0.1) ℃。在此基础上,对整机进行了力、热和电磁兼容试验,结果表明待测LCVR和电子学系统功能稳定,成功完成了LCVR这一首飞器件的空间光电测试系统在我国的首次研制,对液晶的空间化应用有着重要意义。
Liquid crystal variable retarder (LCVR) has become a new research area for space-based optical instruments because of its fast modulation speed, light weight and no moving parts
.etc
. Nevertheless, the molecule in LCVR is a type of liquid crystal polymer, its space adaptability needs to be verified. Because we cannot simulate the space environment absolutely in the ground, it is necessary to develop a LCVR experimental device to study the electro-optic performance of LCVR in space. In this paper, the stability of a LCVR measurement system is analyzed, and an electronic measurement scheme for LCVR’s retardation-voltage curve is designed. Firstly, a zero-calibration method is proposed to improve the stability of the driving voltage for LCVR. Then, the high precision temperature control is realized by using frequency conversion error control method. The driving stability reaches 99.3% and the constant temperature accuracy reaches (35 ± 0.1) °C. Based on this, the mechanical, thermal and electromagnetic compatibility tests are carried out. The experimental results show that the electronic system are stable, and the first space photo-electric measurement system for LCVR is successfully developed in China, which is of great significance to the application of LCVR in space.
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