高速目标激光探测气动光畸变传输计算  

Aerodynamic Distortion Propagation Calculation in Application of High-Speed Target Detection by Laser

作　　者：郑勇辉[1] 孙华燕[1] 赵延仲[1] 陈剑彪[1] 

机构地区：[1]中国人民解放军装备学院,北京101416

出　　处：《中国激光》2015年第8期337-343,共7页Chinese Journal of Lasers

基　　金：国家自然科学基金(61302183)

摘　　要：激光主动探测技术在防空反导作战中具有广阔的应用前景,然而飞机、导弹等高速目标的气动绕流场会对探测光束产生严重的畸变效应,针对探测激光在高速目标"猫眼"镜头传输和双重气动流场传输这一复杂物理过程,开展了对光束的畸变传输计算方法研究。分别采用Collins公式和角谱衍射理论对入射和反射过程进行物理光学传输计算;依据光在随机介质中的传输理论对气动流场的湍流特性进行了估计,求得了脉动光畸变光程差(OPD)均方根(RMS)值和远场Strehl比;以半球加圆柱这一典型转台模型为例对计算流体力学和探测光束的畸变传输进行了计算。The active laser detection technique has a broad application prospect in the antimissile and air defense.However, the aerodynamic flow field around the planes and missiles causes serious distortion effect on the detection laser beams, according to the complicate physical process of the laser propagation in the＂cat-eye＂lenses and aerodynamic flow field, distortion propagation calculation method is performed. The physical optics propagation equations for the incidence and reflection process are calculated using Collins formula and angular spectrum diffraction theory respectively. In addition, turbulent performance of the aerodynamic flow field is estimated according to the propagation theory through a random medium, the root mean square（RMS） optical path difference（OPD） and Strehl ratio of the turbulent optical distortion are obtained. Computational fluid mechanics and propagation distortion calculation of the detection laser beam are performed with the hemisphere-on-cylinder turret as an example.

关 键 词：遥感 气动光学 物理光学 “猫眼”效应 畸变传输 湍流特性 

分 类 号：TN249[电子电信—物理电子学]