基于多视场拼接光电经纬仪的成像系统指向校正方法  

Pointing Calibration Method for Imaging Systems of Photoelectric Theodolites with Multi-Field of View Stitching

作　　者：赵怀学[1,3] 刘波 谢梅林[2] 田留德[1,3] 周艳[1] Zhao Huaixue;Liu Bo;Xie Meilin;Tian Liude;Zhou Yan(Testing Technology Research Center,Xi'an Institute of Optics and Precision Mechanics,Chinese Academy of Sciences,Xi'an Shaanxi 710119,China;Key Laboratory of Space Precision Measurement Technology,Xi'an Institute of Optics and Precision Mechanics,Chinese Academy of Sciences,Xi'an,Shaanxi 710119,China;School of Optoelectronics,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院西安光学精密机械研究所检测技术研究中心,陕西西安710119 [2]中国科学院西安光学精密机械研究所空间精密测量重点实验室,陕西西安710119 [3]中国科学院大学光电学院,北京100049

出　　处：《光学学报》2022年第6期190-194,共5页Acta Optica Sinica

摘　　要：分析了传统光电经纬仪脱靶量修正模型和多视场拼接光电经纬仪的特点,基于坐标变换原理,推导了成像系统具有大照准差和零位差的光电经纬仪脱靶量修正公式。依据上述脱靶量修正公式和目标模拟器指向,逆向推导了大照准差和零位差的光电经纬仪脱靶量计算公式,结合实际成像系统脱靶量信息,解算成像系统的指向校正系数。经实验验证表明,该方法突破了传统畸变修正模拟的局限性,适用于多视场拼接光电经纬仪的成像系统指向校正。针对大照准差为11.26°和大零位差为18.08°的2×3外拼接阵列测量系统,采用多成像模块外拼接型光电经纬仪系统的指向校正方法,得到水平和垂直的指向误差均小于1/5 pixel。After analyzing the traditional calibration model for target deviations of photoelectric theodolites and the characteristics of photoelectric theodolites with multi-field of view stitching,we derive a calibration formula for target deviations of photoelectric theodolites with imaging systems that have large collimation errors and zero offsets according to the principle of coordinate transformation.The above calibration formula and target simulator pointing are used to reversely deduce the calculation formula of target deviations of photoelectric theodolites with large collimation errors and zero offsets.The pointing calibration coefficient of the imaging system is solved through its actual target deviation.A verification test shows that the proposed approach breaks through the limitations of the existing distortion correction model and can be applied to pointing calibration of the imaging systems of photoelectric theodolites with multi-field of view stitching.The measurement system with a 2×3 externally stitched array discussed in this paper has a collimation error of 11.26°and a zero offset of 18.08°.Both the horizontal and vertical pointing errors are less than 1/5 pixel after the system is calibrated by the pointing calibration method for photoelectric theodolites with multiple externally stitched imaging modules.

关 键 词：测量 光电经纬仪 脱靶量 指向校正 视场拼接 

分 类 号：TH761[机械工程—仪器科学与技术]