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题名:
The research of methods to improve the control bandwidth for liquid crystal beam steering system
作者: Hao, Ya-Jing; Huang, Yong-Mei; Wu, Qiong-Yan; Xiao, Wen-Ben
出版日期: 2013
会议名称: Proceedings of SPIE: International Symposium on Photoelectronic Detection and Imaging 2013: Laser Communication Technologies and Systems
会议日期: 2013
学科分类: Bandwidth - Light modulators - Models
DOI: 10.1117/12.2034535
中文摘要: The liquid crystal beam steering technology with low driving voltage, high diffraction efficiency and without the effect of mechanical inertia, is regard as a potential technology in the field of non-mechanical beam steering. Liquid crystal spatial light modulator (LCSLM) can be applied as a beam steering control device in laser communication, and it can realize the programmable control in real time. And compared with fast steering mirror (FSM), which is widely used at present, LCSLM is smaller, lighter and lower power consumptive in a non-mechanical way, so it's convenient to control. But the system bandwidth is a restricted problem in the research. In this article, the principle of beam steering with LCSLM is introduced firstly. A beam steering bench is set up using reflective pure-phase LCSLM from BNS. The offset of beam spot is detected by the CCD and a classic PI close-loop control experiment is designed to test the system bandwidth. And then the factors which restricted the control bandwidth are analyzed. Considering the effect of the CCD' frame rate, the PSD with higher frame rate is used in the control system and the data model of the liquid crystal is tested. A controller is designed based on the data model and the bandwidth is improved observably. © 2013 Copyright SPIE.
英文摘要: The liquid crystal beam steering technology with low driving voltage, high diffraction efficiency and without the effect of mechanical inertia, is regard as a potential technology in the field of non-mechanical beam steering. Liquid crystal spatial light modulator (LCSLM) can be applied as a beam steering control device in laser communication, and it can realize the programmable control in real time. And compared with fast steering mirror (FSM), which is widely used at present, LCSLM is smaller, lighter and lower power consumptive in a non-mechanical way, so it's convenient to control. But the system bandwidth is a restricted problem in the research. In this article, the principle of beam steering with LCSLM is introduced firstly. A beam steering bench is set up using reflective pure-phase LCSLM from BNS. The offset of beam spot is detected by the CCD and a classic PI close-loop control experiment is designed to test the system bandwidth. And then the factors which restricted the control bandwidth are analyzed. Considering the effect of the CCD' frame rate, the PSD with higher frame rate is used in the control system and the data model of the liquid crystal is tested. A controller is designed based on the data model and the bandwidth is improved observably. © 2013 Copyright SPIE.
收录类别: Ei
语种: 英语
卷号: 8906
ISSN号: 0277786X
文章类型: 会议论文
页码: 89061T
Citation statistics:
内容类型: 会议论文
URI标识: http://ir.ioe.ac.cn/handle/181551/7397
Appears in Collections:光电工程总体研究室(一室)_会议论文

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作者单位: Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, Sichuan 610209, China

Recommended Citation:
Hao, Ya-Jing,Huang, Yong-Mei,Wu, Qiong-Yan,et al. The research of methods to improve the control bandwidth for liquid crystal beam steering system[C]. 见:Proceedings of SPIE: International Symposium on Photoelectronic Detection and Imaging 2013: Laser Communication Technologies and Systems. 2013.
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