近红外空间碎片激光测距光束准直性标校方法  

Calibration method for beam collimation of near-infrared space debris laser ranging

作　　者：郑谣 范存波[1] 董雪[1] 张楠[1] 梁智鹏[1] 宋清丽[1] 高健[1] 苗澍茁 陈宏岩 董贺[3] ZHENG Yao;FAN Cun-bo;DONG Xue;ZHANG Nan;LIANG Zhi-peng;SONG Qing-li;GAO Jian;MIAO Shu-zhuo;CHEN Hong-yan;DONG He(Changchun Observatory/NAO,Chinese Academy of Sciences,Changchun 130117,China;University of Chinese Academy of Sciences,Beijing 100049,China;Jilin Normal University,Siping 136000,China)

机构地区：[1]中国科学院国家天文台长春人造卫星观测站,吉林长春130117 [2]中国科学院大学,北京100049 [3]吉林师范大学,吉林四平136000

出　　处：《激光与红外》2022年第12期1815-1819,共5页Laser & Infrared

基　　金：国家自然科学基金面上项目(No.11973064)资助。

摘　　要：将1064 nm波长激光应用于漫反射空间碎片激光测距,具有大气透过率高、回波光子数多、白天天空背景噪声低的优势。由于近红外激光束后向散射图像的信噪比与对比度较低,导致图像中光束边界模糊,光尖坐标提取困难,无法精确控制发射准直性和望远镜收发光轴平行性,不利于回波获取。为此,提出了一种基于图像处理的光束准直性标校方法,实现光束闭环控制,修正激光束出射准直性,提高望远镜收发光轴平行性。实验结果表明,所提方法能够显著改善1064 nm波长激光束出射准直性,实现了望远镜收发光轴平行性的闭环控制。The laser of 1064 nm has the advantages of high atmospheric transmittance,large number of echo photons,and low background noise in the daytime when applied to the laser ranging of space debris under diffuse reflection conditions.Due to the low signal-to-noise ratio and contrast of the backscatter image of the near-infrared laser beam,the boundary of the light beam in the image is blurred,the coordinate of the light tip is difficult to be extracted,making it impossible to precisely control the launch collimation and the parallelism of the telescope′s receiving and emitting axis,which is not conducive to echo acquisition.To this end,a beam collimation calibration method based on image processing is proposed to achieve closed-loop control of the beam,correct the collimation of the laser beam and improve the parallelism of the telescope′s receiving and emitting axis.The experimental results show that the proposed method can significantly improve the collimation of the 1064 nm wavelength laser beam,and realize the closed-loop control of the parallelism of the telescope′s receiving and emitting axis.

关 键 词：近红外 激光发射 图像处理 激光光尖 

分 类 号：TN219[电子电信—物理电子学] TP391.41[自动化与计算机技术—计算机应用技术]