水平蒙气色差对光轴标定的影响

量子电子学报 ›› 2020, Vol. 37 ›› Issue (4): 386-391.

• “激光大气传输与探测”专辑 • 上一篇下一篇

水平蒙气色差对光轴标定的影响

习锋杰1, 杨轶1*, 靖旭2, 杜少军1 , 许晓军1*

1 国防科技大学前沿交叉学科学院, 湖南长沙410073; 2 中国科学院合肥物质科学研究院安徽光学精密机械研究所, 安徽合肥230031

收稿日期:2020-06-02 修回日期:2020-06-21 出版日期:2020-07-28 发布日期:2020-07-21
通讯作者: E-mail: yangyi0815@yeah.net; xuxiaojun@nudt.edu.cn E-mail:yangyi0815@yeah.net; xuxiaojun@nudt.edu.cn
作者简介:习锋杰( 1979 - ), 陕西合阳人, 博士, 副研究员, 主要从事高能激光, 大气光学和自适应光学等方面的研究。 E-mail: xifengjie@nudt.edu.cn
基金资助:
Supported by National Natural Science Foundation of China (国家自然科学基金, 61378065)

Dispersion influence of horizontal atmospheric refraction on calibration of optical axis

XI Fengjie1, YANG Yi1*, JING Xu2, DU Shaojun1, XU Xiaojun1*

1 College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China; 2 Anhui Institute of Optics and Fine Mechanics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China

Received:2020-06-02 Revised:2020-06-21 Published:2020-07-28 Online:2020-07-21

摘要/Abstract

摘要： 激光系统的发射光和跟踪光波长通常会有所不同, 在近地面开展发射光轴和跟踪光轴的高精度定标时, 需要考虑水平传输路径上的大气蒙气色差。理论分析得到水平大气蒙气色差与大气温度垂直梯度、气压垂直梯度、激光波长及传输距离之间的关系, 进而分析了近地面水平大气蒙气色差带来的光轴定标误差。利用自动气象站测量了不同高度的大气温度和气压, 计算分析表明近地面1 km水平大气对1 μm 和5 μm两个波段可能会造成3 μrad的蒙气色差, 引起约1.5 μrad 的定标误差。研究表明为减小光轴定标误差, 需监测近地面水平大气蒙气色差, 并选择在大气蒙气色差较小的时刻进行光轴定标。

关键词: 大气光学, 水平蒙气色差, 激光系统, 光轴定标

Abstract: In general, the wavelength of the projected laser in a laser system is a bit different from the beacon wavelength used for target acquisition and tracking. So the dispersion influence of atmospheric refraction in the horizontal transmission path should be considered to reduce calibration errors of the optical axis. Firstly, the relationship between dispersion effect of horizontal atmospheric refraction and various practical parameters, such as vertical temperature gradient, vertical pressure gradient, laser wavelength and laser transmitting distance, is deduced by theoretical analysis. Then the calibration errors of optical axis caused by dispersion effect of horizontal atmospheric refraction in the near surface layer is also analyzed. Furthermore, atmospheric temperature and pressure of varying height are measured by means of two automatic meteorological stations. And the calculation results show that the dispersion effect of horizontal atmospheric refraction in the near surface layer for 1 km transmission could be about 3 μrad for 1 μm and 5 μm wavelengths, which would lead to calibration errors of about 1.5 μrad. It indicates that dispersion effect of horizontal atmospheric refraction in the near surface layer should be monitored in order to reduce the optical axis calibration error, and the optical axis calibration should be carried out when dispersion effect is slight enough.

Key words: atmospheric optics, dispersion effect of horizontal atmospheric refraction, laser system; optical axis calibration

中图分类号:

O435.1

习锋杰, 杨轶, 靖旭, 杜少军, 许晓军. 水平蒙气色差对光轴标定的影响[J]. 量子电子学报, 2020, 37(4): 386-391.

XI Fengjie, YANG Yi, JING Xu, DU Shaojun, XU Xiaojun. Dispersion influence of horizontal atmospheric refraction on calibration of optical axis[J]. Chinese Journal of Quantum Electronics, 2020, 37(4): 386-391.

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水平蒙气色差对光轴标定的影响

Dispersion influence of horizontal atmospheric refraction on calibration of optical axis

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