哈特曼与CCD传感器信标光轴精密定位对比与研究.pdfVIP

二〇一〇国防空天信息技术前沿论坛论文集 哈特曼与CCD 传感器信标光轴精密定位对比研究 景文博，姜会林，王晓曼，杨文波，付 强 （长春理工大学，吉林长春 130022 ） 摘 要：捕获、对准和跟踪是大气激光通信系统的核心技术，信标光轴的精密对准可提高通信 的稳定性和降低通信误码率。信标光轴的对准主要是对大气激光通信中光束到达角的计算，应用传 统的 CCD 传感器的光斑质心算法，在强湍流的扰动下，已经无法准确地测量光束的到达角；本文提 出了应用哈特曼传感器对波前进行探测，采用Zernike 多项式模式法重构波前实时计算到达角起伏， 并分析了 Zernike 模式法重构精度。实验表明，在焦距为 1.6m，采用传统CCD 传感器质心算法测量 到达角起伏精度为 4 ～8μrad （RMS ）；哈特曼传感器在等效焦距为 350mm 的情况下，测量精度优于 2μrad （RMS ）。满足大气激光通信系统 APT 和甚远距离 APT 技术的需求，同时也满足了未来激光 通信机载、星载轻小型化的需求。 关键词：大气激光通信； 信标光； 光轴定位； 到达角； 哈特曼传感器 中图分类号：TN929.12 Compare to Hartmann and CCD sensor for precision positioning of beacon optical axis JING Wen-bo, JIANG Hui-lin, WANG Xiao-man, YANG Wen-bo, FU Qiang (Changchun University of Science and Technology, Changchun 130022, China) Abstract: APT is the key technology in atmospheric laser communication, precision pointing of beacons can improve the stability of communication and reduce the bit error rate, and the main method is to calculated beam arrival angle. The spot centroid algorithm of Traditional CCD sensors didnt meet the requirements in disturbance of strong turbulence. In this paper, Zernike Polynomial model method was used to calculate the angle of arrival fluctuations and analysis the accuracy of reconstruction. The accuracy of arrival angle fluctuations is 4~8μrad when using the traditional CCD sensor measuring centroid algorithm in the focal length of 1.6m; However, the measurement accuracy of arrival angle fluctionthe better than 2μrad (RMS) when using Hartmann sensor in the focal length of 350mm. The method