卫星激光测距中光束亮度的偏振影响及应用

吴志波; 邓华荣; 张海峰; 汤凯; 张忠萍

doi:10.3788/IRLA201645.0306005

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卫星激光测距中光束亮度的偏振影响及应用

吴志波, 邓华荣, 张海峰, 汤凯, 张忠萍

文章导航 > 红外与激光工程 > 2016 > 45(3): 306005-0306005(5)

吴志波, 邓华荣, 张海峰, 汤凯, 张忠萍. 卫星激光测距中光束亮度的偏振影响及应用[J]. 红外与激光工程, 2016, 45(3): 306005-0306005(5). doi: 10.3788/IRLA201645.0306005

引用本文:

Wu Zhibo, Deng Huarong, Zhang Haifeng, Tang Kai, Zhang Zhongping. Polarization effects of laser beam brightness and its application in Satellite Laser Ranging[J]. Infrared and Laser Engineering, 2016, 45(3): 306005-0306005(5). doi: 10.3788/IRLA201645.0306005

Citation:

Wu Zhibo, Deng Huarong, Zhang Haifeng, Tang Kai, Zhang Zhongping. Polarization effects of laser beam brightness and its application in Satellite Laser Ranging[J]. Infrared and Laser Engineering, 2016, 45(3): 306005-0306005(5). doi: 10.3788/IRLA201645.0306005

卫星激光测距中光束亮度的偏振影响及应用

doi: 10.3788/IRLA201645.0306005

吴志波^1,2,
邓华荣¹,
张海峰^1,2,
汤凯¹,
张忠萍^1,2

1.
中国科学院上海天文台,上海 200030;
2.
中国科学院空间目标与碎片观测重点实验室,江苏南京 210008

基金项目:

国家自然科学基金(11303074,u1231107);上海市空间导航与定位技术重点实验室基金(06D22101);测绘地理信息公益性行业科研专项经费(201412001)

详细信息

作者简介:
吴志波(1981-),男,高级工程师,硕士,主要从事卫星激光测距及应用方面的研究。Email:wzb@shao.ac.cn

中图分类号: P228.5

Polarization effects of laser beam brightness and its application in Satellite Laser Ranging

1.
Shanghai Astronomical Observatory,Chinese Academy of Sciences,Shanghai 200030,China;
2.
Key Laboratory of Space Object and Debris Observation,Chinese Academy of Sciences,Nanjing 210008,China

摘要: 卫星激光测距(Satellite Laser Ranging,SLR)常利用激光大气后向散射所形成的图像来引导光束指向,而光束图像亮度随天区变化的现象在SLR站普遍存在,影响了激光对卫星的瞄准。以中国科学院上海天文台现有SLR系统为研究平台,阐明了该现象的成因,即光束图像成像光路中分光镜的效率会随偏振方向改变而变化。据此提出偏振方法,通过建立出射激光偏振方向随望远镜位置变化模型,改变发射光路中新引入半波片的角度,实现了光束图像于不同亮度的实时控制。相比使用消偏振分光镜的方案,该方法具有应用灵活、系统简单且成本低的优势,研究成果在提高激光对卫星的瞄准精度及星象图像信噪比等方面具有重要意义。
- 卫星激光测距 /
- 偏振方向 /
- 光束指向 /
- 光束图像 /
- 半波片
Abstract: Laser beam image generated by atmosphere backscattering has been widely used to monitor the laser pointing in Satellite Laser Ranging(SLR). The phenomenon that the brightness of beam image differs from sky sections influences the satellite aiming. Based on the SLR system of Shanghai Astronomical Observatory, Chinese Academy of Sciences, the mechanism of this phenomenon was figured out that the efficiency of splitter mirror was generally related to the polarization state of incident light. Accordingly, a new method was proposed that a half-wave plate was deployed in transmitting path, and rotating it realized the real-time control of different brightness for beam imaging. The model of outgoing laser polarization direction with the pointing of telescope was established. Compared with the use of splitter mirror whose efficiency is independent of polarization direction, the method is more flexible, simpler and less cost. The method can be applied in improving laser beam pointing accuracy in SLR and Signal-to-Noise Ratio(SNR) of star image etc.
- satellite laser ranging /
- polarization /
- laser beam pointing /
- laser beam image /
- half wave plate

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卫星激光测距中光束亮度的偏振影响及应用

doi: 10.3788/IRLA201645.0306005

1. 中国科学院上海天文台,上海 200030;

2. 中国科学院空间目标与碎片观测重点实验室,江苏南京 210008

作者简介:
吴志波(1981-),男,高级工程师,硕士,主要从事卫星激光测距及应用方面的研究。Email:wzb@shao.ac.cn

收稿日期: 2015-07-14
修回日期: 2015-08-19
刊出日期: 2016-03-25

基金项目:

国家自然科学基金(11303074,u1231107);上海市空间导航与定位技术重点实验室基金(06D22101);测绘地理信息公益性行业科研专项经费(201412001)

中图分类号: P228.5

关键词:

摘要: 卫星激光测距(Satellite Laser Ranging,SLR)常利用激光大气后向散射所形成的图像来引导光束指向,而光束图像亮度随天区变化的现象在SLR站普遍存在,影响了激光对卫星的瞄准。以中国科学院上海天文台现有SLR系统为研究平台,阐明了该现象的成因,即光束图像成像光路中分光镜的效率会随偏振方向改变而变化。据此提出偏振方法,通过建立出射激光偏振方向随望远镜位置变化模型,改变发射光路中新引入半波片的角度,实现了光束图像于不同亮度的实时控制。相比使用消偏振分光镜的方案,该方法具有应用灵活、系统简单且成本低的优势,研究成果在提高激光对卫星的瞄准精度及星象图像信噪比等方面具有重要意义。

English Abstract

Polarization effects of laser beam brightness and its application in Satellite Laser Ranging

1. Shanghai Astronomical Observatory,Chinese Academy of Sciences,Shanghai 200030,China;

2. Key Laboratory of Space Object and Debris Observation,Chinese Academy of Sciences,Nanjing 210008,China

Received Date: 2015-07-14
Rev Recd Date: 2015-08-19
Publish Date: 2016-03-25

Keywords:

Abstract: Laser beam image generated by atmosphere backscattering has been widely used to monitor the laser pointing in Satellite Laser Ranging(SLR). The phenomenon that the brightness of beam image differs from sky sections influences the satellite aiming. Based on the SLR system of Shanghai Astronomical Observatory, Chinese Academy of Sciences, the mechanism of this phenomenon was figured out that the efficiency of splitter mirror was generally related to the polarization state of incident light. Accordingly, a new method was proposed that a half-wave plate was deployed in transmitting path, and rotating it realized the real-time control of different brightness for beam imaging. The model of outgoing laser polarization direction with the pointing of telescope was established. Compared with the use of splitter mirror whose efficiency is independent of polarization direction, the method is more flexible, simpler and less cost. The method can be applied in improving laser beam pointing accuracy in SLR and Signal-to-Noise Ratio(SNR) of star image etc.