摘要
为降低光学设备被激光主动探测的概率,采用像面倾斜的方法来减弱光学系统的激光回波。基于光线传输和2维平面波角谱衍射理论,分析探测激光入射到倾斜像面光学系统的衍射光场分布特性,设计一款像面倾斜4°的可见光系统,通过引入自由曲面校正像面倾斜带来的系统像差。结果表明:系统在奈奎斯特频率61lp/mm处,全视场的传递函数均高于0.58,成像质量好。像面倾斜4°的猫眼隐身光学系统,其激光回波效率相较于像面不倾斜光学系统减弱50%以上,系统被探测到的概率明显降低。
In order to reduce the probability of optical equipment being detected by laser active detection device,the method of oblique image plane is used to weaken the laser echo of optical system.Based on the theory of light transmission and 2-D plane wave angle spectrum diffraction,the distribution characteristics of the diffraction light field of the oblique image surface optical system are analyzed.A visible light optical system with a photosensitive inclined surface to 4 degrees is designed.The system aberration caused by oblique image is corrected by introducing free-form surface.The design results show that at Nyquist frequency 61lp/mm,the optical transfer function of each field of view of the system is higher than 0.58,which is close to the diffraction limit and meets the requirements of imaging quality.The laser echo efficiency of cat’s eye stealth optical system with an oblique image surface of 4 degrees is reduced by more than 50% compared with that of the non-inclined image surface optical system,and the probability of detection of the system is significantly reduced.
作者
雷培奇
高明
陈阳
Lei Peiqi;Gao Ming;Chen Yang(School of Optoelectronic Engineering,Xi’an Technological University,Xi’an 710021,China)
出处
《兵工自动化》
2019年第10期10-17,共8页
Ordnance Industry Automation
关键词
猫眼效应
像面倾斜
激光主动探测
猫眼隐身
cat eye effect
oblique image surface
laser active detection
cat eye stealth
