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1. 北京理工大学 机电动态控制重点实验室 北京,100081
2. 北京理工大学 爆炸科学与技术国家重点实验室 北京,100081
[ "陈慧敏(1973-),男,河北临城人,副教授,1998年,2005年于北京理工大学分别获得学士、博士学位,主要从事激光引信抗干扰的研究。E-mail:laserchm@126.com" ]
[ "刘新阳(1990-),女,吉林松原人,硕士研究生,2013年于山东大学获得学士学位,主要从事激光引信抗干扰的研究。E-mail:thea1104@163.com" ]
收稿日期:2014-06-19,
修回日期:2014-08-09,
纸质出版日期:2015-03-25
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陈慧敏, 刘新阳,. 收发同轴脉冲激光引信在水雾中的后向散射偏振特性[J]. 光学精密工程, 2015,23(3): 626-631
CHEN Hui-min, LIU Xin-yang,. Backscattering polarization characteristics of pulsed laser fuze with coaxial optical system in water fog[J]. Editorial Office of Optics and Precision Engineering, 2015,23(3): 626-631
陈慧敏, 刘新阳,. 收发同轴脉冲激光引信在水雾中的后向散射偏振特性[J]. 光学精密工程, 2015,23(3): 626-631 DOI: 10.3788/OPE.20152303.0626.
CHEN Hui-min, LIU Xin-yang,. Backscattering polarization characteristics of pulsed laser fuze with coaxial optical system in water fog[J]. Editorial Office of Optics and Precision Engineering, 2015,23(3): 626-631 DOI: 10.3788/OPE.20152303.0626.
考虑激光引信的探测性能易受大气气溶胶的散射作用和吸收作用的影响
本文基于Mie散射理论
采用Monte Carlo方法模拟了脉冲激光在水雾中的后向散射偏振特性。对1~10 μm的19种粒径的水雾进行仿真
获得了典型波长和水雾粒径下激光后向散射的平均偏振对比度。建立了收发同轴脉冲激光在水雾下的后向散射偏振特性实验系统
通过改变超声波加湿器的浓度
得到了5种典型粒径的模拟水雾粒子
并对其进行了实验。研究结果表明:当水雾粒径在1~10 μm时
激光后向散射的平均偏振对比度为0.30~0.65
实验结果与仿真结果具有较好的一致性。得到的结果证明了激光后向散射理论模型和Monte Carlo仿真的正确性
为激光引信的抗水雾干扰研究提供了理论支撑。
The performance of laser fuze is vulnerable to be scattered and absorbed by atmospheric aerosols while it propagates in atmosphere. In this work
the backscattering polarization characteristics of a pulsed laser in water fog were researched by using Mie scattering theory and Monte Carlo simulation. By simulating 19 kinds of fog particles with diameters of 1—10 μm
the Mean Contrast of Polarization (MCOP) of backscattering laser was obtained for typical wavelengths and diameters. An experimental system for the backscattering polarization characteristics of a coaxial pulsed laser was established in water fog. Five kinds of man-made fog particles with different diameters were obtained by changing the concentration of an ultrasonic humidifier. The man-made fog particles were measured experimentally
and the results show when fog particle diameters are in 1—10 μm
the MCOP of laser backscattering is from 0.30 to 0.65. Experimental results agree well with the simulation data
thus verify the validity of laser backscattering theory model and Monte Carlo simulation
and provide a method for laser fuze anti-interference of clouds and fogs.
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