摘要
进行了1.8km和3.4km的直视逆合成孔径激光成像雷达外场实验,给出了远距离成像模式下考虑相位延时的非线性校正算法。实验中,目标为放置在无人机上的角锥和包裹有反射纸的无人机。通过交轨向包络对齐和顺轨向相位补偿算法,先后得到了不同成像距离下的角锥目标图像和1.8km成像距离下的无人机图像。成像距离为1.8km时二维分辨率达到了7.2mm×5.8mm,成像距离为3.4km时二维分辨率达到了12.7mm×9.2mm。
Outdoor experiments of down-looking inverse synthetic aperture imaging lidar at 1.8 km and 3.4 km are processed.A nonlinear correction algorithm is given under the remote imaging mode,in which the phase delay cannot be neglected.In the experiment,the targets are pyramids put in the unmanned aerial vehicles and the unmanned aerial vehicles with retro-reflective material.The images of pyramids in different imaging distances and the unmanned aerial vehicles at 1.8 km are obtained through the range bin alignment algorithm in the orthogonal direction and phase compensation algorithm in the azimuthal direction.The two-dimensional resolutions reach7.2 mm×5.8 mm at 1.8 km and 12.7 mm×9.2 mm at 3.4 km.
作者
李光远
卢智勇
周煜
孙建锋
许倩
劳陈哲
贺红雨
张国
Li Guangyuan;Lu Zhiyong;Zhou Yu;Sun Jianfeng;Xu Qian;Lao Chenzhe;He Hongyu;Zhang Guo(Key Laboratory of Space Laser Communication and Testing Technology, Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences, Shanghai 201800, China;University of Chinese Academy of Sciences, Beijing 100049, China)
出处
《光学学报》
EI
CAS
CSCD
北大核心
2018年第4期1-7,共7页
Acta Optica Sinica
基金
国家自然科学基金(61605226
61505233)
关键词
大气光学
直视逆合成孔径
激光成像雷达
空间相位调制
外场实验
atmospheric optics
down-looking inverse synthetic aperture
imaging lidar
spatial phase modulation
outdoor experiment
