摘要
为了实现对远距离民航飞机目标的探测、跟踪和测距,设计并研制了一套单光子激光与中波红外共口径探测光学系统。阐述了激光/红外共口径探测系统的工作原理和单光子激光测距原理,对目标辐射特性、系统作用距离及口径等进行了分析。采用R-C光学系统型式,通过次镜进行分色,实现激光和中波红外双波段光学系统的汇聚光路分色设计。在单光子激光光路中设置小孔光阑,通过仿真分析验证了小孔光阑的杂光抑制能力。通过高精度装调和视轴标定,激光/红外共口径探测系统具备良好的成像质量,中波光路实测调制传递函数达0.28(@20 lp/mm)。利用原理样机完成了对民航飞机的外场探测实验,实验结果表明,该系统可实现对远距离民航飞机的有效探测和跟踪,探测距离达225 km以上,可满足航空、航天及地面探测领域对远距离目标的预警探测和测距需求。
A medium-wave-infrared(MWIR)and single-photon-laser common-aperture optical system was developed to realize target detection,tracking,and ranging of long-distance civilian aviation aircraft.In this study,the working principle of the laser/infrared common-aperture system was presented,and the target radiation characteristics,system operating range,and size of the aperture were analyzed.An R-C optical system with a dichroic lens as a secondary mirror was used to realize the dichroic design of the com⁃mon-aperture system.A small aperture was set in the path of the single-photon laser,and the stray light suppression of the aperture was verified by modeling and simulation.High-precision assembly and line-ofsight calibration revealed that the laser/MWIR common-aperture optical system exhibited high-quality im⁃aging.The modulation transfer function of the laser/MWIR optical system was measured to be 0.28(@20lp/mm).The prototype was used to detect and track a civilian aviation aircraft,and the results of the experiment revealed that the range of the common-aperture system exceeded 225 km.The proposed device can satisfy the application requirements for early warning and ranging of long-distance targets in aviation,aerospace,and ground detection.
作者
吴洪波
张新
王灵杰
闫磊
史广维
WU Hong-bo;ZHANG Xin;WANG Ling-jie;YAN Lei;SHI Guang-wei(Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《光学精密工程》
EI
CAS
CSCD
北大核心
2021年第6期1260-1269,共10页
Optics and Precision Engineering
基金
国家自然科学基金青年基金资助项目(No.62005271)。
关键词
光学系统设计
单光子激光
中波红外
共口径
小孔光阑
远距离探测
optical system design
single photon laser
midium-wave infrared
common aperture
small aperture
long-distance detection
