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1.中国科学院 长春光学精密机械与物理研究所,吉林 长春 130033
2.中国科学院大学,北京 100049
E-mail:sgwzhy@126.com
Received:31 December 2020,
Revised:25 February 2021,
Published:15 June 2021
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吴洪波,张新,王灵杰等.单光子激光与中波红外共口径探测光学系统[J].光学精密工程,2021,29(06):1260-1269.
WU Hong-bo,ZHANG Xin,WANG Ling-jie,et al.Common aperture optical system of single photon laser and medium wave infrared[J].Optics and Precision Engineering,2021,29(06):1260-1269.
吴洪波,张新,王灵杰等.单光子激光与中波红外共口径探测光学系统[J].光学精密工程,2021,29(06):1260-1269. DOI: 10.37188/OPE.20212906.1260.
WU Hong-bo,ZHANG Xin,WANG Ling-jie,et al.Common aperture optical system of single photon laser and medium wave infrared[J].Optics and Precision Engineering,2021,29(06):1260-1269. DOI: 10.37188/OPE.20212906.1260.
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 common-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-of-sight calibration revealed that the laser/MWIR common-aperture optical system exhibited high-quality imaging. 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.
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