摘要
用波长1.06μm的YAG晶体激光器作为激光光轴指示器,设计一套远距离激光瞄准测试系统,在外场环境下进行大量实验,采集了不同距离、不同时段的光斑变化数据。在对光斑数据进行图像处理以及统计分析的基础上,通过分析不同时段光斑偏移标准差,研究了光束在3km范围内不同距离的偏移情况。同时,基于推广的惠更斯-菲涅耳原理和实测的现场气象数据,分析了湍流效应对传输光束相干性的影响。结果表明:大气的湍流效应以及相干性变化都会影响到光束的传输特性。结合实验得到的标准差曲线对统计模型进行修正,可为提高激光测试系统的瞄准精度提供依据。
Using a 1.06 μm YAG laser as the laser optical axis indicator,a long-range laser aiming test system was designed.A large number of experiments were carried out at outfield,at the same time,the data on laser spot change at different distances and different periods were collected.Based on image processing and statistical analysis,the standard deviation of spot shifting was analyzed in different periods,and the deviation of laser beam at different distances in the range of 3 km was studied.Based on the extended Huygens-Fresnel principle and the actual measuring meteorological data,the influence of the turbulent effects on beam coherence was analyzed.Theoretical analysis and experimental results show that the turbulent effects and the change of beam coherence can effectively influence the transmission characteristics of the laser.The standard deviation curve is used to modify the statistical model,which can provide a basis to improve the aiming accuracy of the laser test system.
出处
《红外与激光工程》
EI
CSCD
北大核心
2010年第1期31-36,共6页
Infrared and Laser Engineering
基金
国家自然科学基金资助项目(60771038)
关键词
湍流效应
激光测试
瞄准偏差
部分相干光
Turbulent effects
Laser test
Aiming deviation
Partially coherent beam
