用于空间目标动态跟踪的阵列式激光束  

Phased array laser beams for dynamically tracking spatial object

作　　者：刘伯晗[1] 张健[1] 吴丽莹[1] 

机构地区：[1]哈尔滨工业大学超精密光电仪器工程研究所,哈尔滨150001

出　　处：《哈尔滨工业大学学报》2008年第11期1777-1780,共4页Journal of Harbin Institute of Technology

摘　　要：设计了一个以256×256像素液晶空间光调制器为激光光束偏转器件的空间目标追踪系统.该系统通过空间光调制器对入射光的纯相位调制来产生动态指向空间目标的二维激光束阵列,以达到对目标的动态跟踪.阵列式光束是通过任意点阵图的相位优化设计方法产生的,该设计方法通过优化算法给出目标图形的优化相位.针对具体运动目标,进行了系统的动态性和偏转角度误差的测试实验,结果表明该追踪系统动态响应时间小于200 m s,偏转角度误差不超过0.032°.采用该方法对空间目标进行扫描跟踪,具有精确、响应快、无机械惯性等特点,在激光寻的、制导以及多目标威胁预警和反击中有重要研究价值.A space object tracking system was designed by using a 256 × 256 pixels liquid crystal Spatial Light Modulator （SLM） as the laser beams steering device. To track the object, 2 -D phased array laser beams were generated to point the moving object by the phase-only modulation of the incident light. According to the phase retrieval optimal algorithm, dynamic laser array beams were obtained to approach the target pattern. An experiment was demonstrated to test the characterizations of the response time and the steering angle error. Results show that the response time is less than 200 ms and the steering angle error is less than 0. 032°. The designed space object tracking system possesses the advantages of accuracy, quick response without mechanical inertia and so on, which is of great value in the fields of multi-object tracing, laser guiding and multi-object defense.

关 键 词：目标追踪 空间光调制器 相位调制 

分 类 号：TN249[电子电信—物理电子学]