摘要
红外成像探测和可见光成像探测结合使用能够提升光电成像组件的全天候探测能力、抗干扰能力和目标捕获能力。为了实现长波红外/可见光双光谱复合光电成像组件的小型化,光学部分采用共轴折反式成像,探测组件采用一体化机芯设计。长波红外光信号经由包含衍射透镜的三片红外透镜成像到非制冷焦平面探测器上,可见光信号经过嵌套在首片红外镜片中心的可见光镜组聚焦,被位于孔径中心的平面反射镜反射到红外镜筒侧面。长波红外通道F#为0.95,焦距44 mm,视场10°×8°;可见光通道F#为4.3,焦距25 mm,视场7.9°×6.3°。整个光机系统经过-40~+60℃被动无热化设计,复合光电成像组件整体结构简单紧凑、体积小、质量轻。实验证明该复合光电成像组件成像良好,完全满足设计指标。
Objective With the rapid development of photoelectric detection technology,the wide use of various interference,camouflage and stealth technologies,as well as the diversity of detection and identification targets and the changing complexity of the use environment,single-spectral photoelectric detection technology is insufficient.The combination of infrared imaging detection and visible light imaging detection can improve the all-weather detection capability,anti-interference capability and target acquisition capability of the photoelectric imaging components.If the optical system of the long-wave infrared/visible dual-spectral imaging components adopts a common aperture splitter structure,each channel uses a separate optical structure and detector,it is assuredly easier to achieve,but the structure will be more complex,the volume and mass will be relatively larger,and the assembly difficulty is relatively larger.On the basis of ensuring the detection capability of the photoelectric imaging components,in order to realize the miniaturization of the long-wave infrared/visible light dual-spectral composite photoelectric imaging components,combined with the engineering application requirements,the long-wave infrared/visible light dual-spectral composite photoelectric imaging components has been successfully designed and fabricated by the modular design idea.Methods Firstly,the optical system is designed according to the optical parameters in the technical requirements.Secondly,the electronic system is designed according to the electrical parameters in the technical requirements.Then,based on the size of optical system and circuit system,the structure is designed and realized.In this process,each part is adjusted and optimized according to the requirements of technical indicators to achieve the purpose of meeting the indicators.Finally,according to the optical,mechanical and electrical characteristics and working requirements of the composite photoelectric imaging components,the environmental adaptability design is completed.The specific design method is as follows:The optical part adopts coaxial refraction reflection type,and the detection component adopts long-wave infrared/visible light integrated movement design.The mechanical structure does not adopt the three-arm bracket with large volume and more light blocking,but fixes the visible light lens group and the planar mirror as an integral component in the center of the first infrared lens,and makes the visible light detector and the side wall of the infrared lens cylinder basically parallel.In this way,space is saved to the greatest extent,the volume is reduced,and the shading of the infrared channel is reduced.Results and Discussions The long-wave infrared light signal is imaged to the uncooled focal plane detector through three infrared lenses including diffraction lenses.The visible light signal is focused through the visible light lens set nested in the center of the first infrared lens,reflected by the planar mirror located in the aperture center to the side of the infrared lens cylinder,and received by the CMOS detector as(Fig.4)and(Fig.8).The performance of the optical system in the long-wave infrared/visible dual-spectral composite photoelectric imaging components directly affects the detection range and target recognition accuracy of the photoelectric components.The design results of the optical part are as follows:The working wavelength of the long-wave infrared channel is 8-12μm,F#is 0.95,the focal length is 44 mm,the field of view is 10°x8°,and the optical length is 53 mm;Visible light channel operating wavelength 0.45-0.75μm,F#is 4.3,focal length 25 mm,field of view 7.9°x6.3°,total optical length 32 mm.Conclusions The whole optical-mechanical system has been passive non-thermal design at-40-+60°C.The composite photoelectric imaging components have simple and compact structure,small size and light weight.The volume(length×width×height)is 62 mmx40 mmx50 mm,and the total weight is(133±3)g.The experimental results show that the composite photoelectric imaging module has good imaging performance and fully meets the design criteria.
作者
唐利孬
任丽
牛霞
聂志强
TANG Linao;REN Li;NIU Xia;NIE Zhiqiang(School of Optoelectronic Engineering,Xidian University,Xi'an 710071,China;Xi'an Zhongke Mingguang Measurement and Control Technology Co.,Ltd.,Xian 710077,China;State Key Laboratory of Ultrafast Optical Science and Technology,Xi'an Institute of Optics and Precision Mechanics,Chinese Academy of Sciences,Xi'an 710119,China)
出处
《红外与激光工程》
北大核心
2025年第7期277-285,共9页
Infrared and Laser Engineering
基金
陕西省重点研发计划项目(2024 CY-JJQ-50,2022 JBGS2-09)。
关键词
光学设计
双光谱复合光电成像组件
共轴折反式成像
长波红外
可见光
无热化
optical design
dual-spectral composite photoelectric imaging components
coaxial refraction reflection type imaging
long wave infrared
visible light
non thermalization
