长波红外激光目标仿真中拖尾现象的消除方法
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摘要
目标仿真是一种能够降低武器测试时间与成本的技术。使用长波红外激光器投射光斑到屏幕上进行目标仿真时,往往会在屏幕上产生拖尾现象,使点状目标难以在屏幕上保持原有形状,严重干扰对目标的精确识别,降低测试精度。通过理论分析了激光功率、激光斑移动速度以及屏幕材料等因素对拖尾的影响,并通过系列的对比实验进行验证。首先,在相同的激光斑移动速度下,激光功率越高,拖尾现象越明显;其次,在激光功率相同的条件下,激光斑移动速度越慢,拖尾现象越明显;最后,不同的材料对10.6μm激光的吸收能力有很大的差别,散热性能越差,拖尾现象越明显。结果证明:采用根据激光斑移动速度实时调节激光功率以及使用适当热物理性质的屏幕材料的方法,可以有效消除和减轻拖尾现象。
Target simulation is a technology that can save time and cost of weapon testing. When long-wave infrared laser was used to project light spot on the spherical screen for target simulation, a trailing of the laser spot in the moving path will be generated. Such trailing makes it difficult to keep the dot target in its original shape. So the trailing interferes with the accuracy of the target identification. The influences of laser power, laser spot movement speed and screen material on the trailing were investigated by theoretical analysis and a series of experiments. Firstly, the higher the laser power was, the more obvious the tailing phenomenon was under the same laser spot moving speed. Secondly, the slower the laser spot moving speed was, the more obvious the tailing phenomenon was under the same laser power conditions. Finally, different materials had great differences in the absorption capacity of 10.6 μm laser.The worse the heat dissipation was under the same laser power conditions, the more obvious the tailing phenomenon was. The results show that the trailing phenomenon of temperature rise can be effectively eliminate and reduced by adjusting the laser power in real time according to the moving speed of the laser spot and using suitable materials for the screen. And the tailing phenomenon is effectively eliminated and reduced.
Target simulation is a technology that can save time and cost of weapon testing. When long-wave infrared laser was used to project light spot on the spherical screen for target simulation, a trailing of the laser spot in the moving path will be generated. Such trailing makes it difficult to keep the dot target in its original shape. So the trailing interferes with the accuracy of the target identification. The influences of laser power, laser spot movement speed and screen material on the trailing were investigated by theoretical analysis and a series of experiments. Firstly, the higher the laser power was, the more obvious the tailing phenomenon was under the same laser spot moving speed. Secondly, the slower the laser spot moving speed was, the more obvious the tailing phenomenon was under the same laser power conditions. Finally, different materials had great differences in the absorption capacity of 10.6 μm laser.The worse the heat dissipation was under the same laser power conditions, the more obvious the tailing phenomenon was. The results show that the trailing phenomenon of temperature rise can be effectively eliminate and reduced by adjusting the laser power in real time according to the moving speed of the laser spot and using suitable materials for the screen. And the tailing phenomenon is effectively eliminated and reduced.
引文
[1]Li X L,Niu C H,Ma M Y,et al.Research on the thermal damage of HgCdTe infrared detector under laser irradiation of 10.6μm wavelength[J].Infrared Technology,2016,38(1):6-9.(in Chinese)
[2]Jiang N,Zhang C,Niu Y X,et al.Numerical simulation of pulsed laser induced damage on CCD arrays[J].Laser&Infrared,2008,38(10):1004-1007.(in Chinese)
[3]Li X B,Wang H J,Yuan X D,et al.Effects of CO2laser irradiation on surface morphology and stress distribution of fused silica[J].Chinese Journal of Lasers,2011,38(9):49-53.(in Chinese)
[4]Song H W,Huang C G.Progress in thermal-mechanical effects induced by laser[J].Advances in Mechanics,2016,46:435-477.(in Chinese)
[5]Wan H,Hu K W,Mu J Y,et al.Damage analysis of fiber reinforced resin matrix composites irradiated by CW laser[J].High Power Laser and Particle Beams,2008,20(1):6-10.(in Chinese)
[6]Xu P.Research on thermal effect of laser irradiated optical materials based on the finite element method[D].Xi′an:Xidian University,2017.(in Chinese)
[7]Wang S W,Li Y,Guo L H,et al.Analysis on the disturbance of CO2laser to long-wave infrared HgCdTe detector[J].J Infrared Millim Wares,2010,29(2):102-104.(in Chinese)
[2]Jiang N,Zhang C,Niu Y X,et al.Numerical simulation of pulsed laser induced damage on CCD arrays[J].Laser&Infrared,2008,38(10):1004-1007.(in Chinese)
[3]Li X B,Wang H J,Yuan X D,et al.Effects of CO2laser irradiation on surface morphology and stress distribution of fused silica[J].Chinese Journal of Lasers,2011,38(9):49-53.(in Chinese)
[4]Song H W,Huang C G.Progress in thermal-mechanical effects induced by laser[J].Advances in Mechanics,2016,46:435-477.(in Chinese)
[5]Wan H,Hu K W,Mu J Y,et al.Damage analysis of fiber reinforced resin matrix composites irradiated by CW laser[J].High Power Laser and Particle Beams,2008,20(1):6-10.(in Chinese)
[6]Xu P.Research on thermal effect of laser irradiated optical materials based on the finite element method[D].Xi′an:Xidian University,2017.(in Chinese)
[7]Wang S W,Li Y,Guo L H,et al.Analysis on the disturbance of CO2laser to long-wave infrared HgCdTe detector[J].J Infrared Millim Wares,2010,29(2):102-104.(in Chinese)