Improving seeking precision by utilizing ghost imaging in a semi-active quadrant detection seeker  

作　　者：Siyuan WANG Lijing LI Wen CHEN Mingjie SUN 

机构地区：[1]Department of Opto-electronic Engineering,Beihang University,Beijing 100083,China

出　　处：《Chinese Journal of Aeronautics》2021年第12期171-176,共6页中国航空学报（英文版）

基　　金：co-supported by National Natural Science Foundation of China(Nos.61922011 and 61675016);the Fundamental Research Funds for the Central Universities。

摘　　要：Conventional semi-active laser guidance takes advantage of the laser designator to illuminate the stable and uniform laser spot on target precisely.The seeker collects the reflected light by a quadrant detector and outputs the relative position information to guide the missile to the illuminating laser spot.However,the designation and guidance accuracy could be jeopardized by the randomly drifting of laser spot caused by the instability of designation platform and air turbulence.In this work,ghost imaging technique is adapted to a quadrant detector semi-active seeker by utilizing structured illumination on the target.With a series of structured illumination masks,the signals from the quadrant detector are multiplexed to perform calculation of the target relative position as well as image reconstruction of the illuminated area simultaneously.Automatic target recognition methods could be further applied to the reconstructed image to calculate the designating error and correct the guidance.The results of simulation and experiment demonstrate that the proposed method could improve the guidance accuracy in many circumstances which would lead to attacking deviation if conventional semi-active laser guidance is used.

关 键 词：Digital micro-mirror device Ghost imaging Guidance system Image acquisition Semi-active laser seeker 

分 类 号：TJ765.331[兵器科学与技术—武器系统与运用工程]