基于直线运动机构的大变倍比红外变焦成像系统  

An infrared zoom imaging system with large zoom ratio based on linear motion mechanism

作　　者：周潘伟 于洋[3] 李范鸣[2,3] 叶锡生 ZHOU Pan-Wei;YU Yang;LI Fan-Ming;YE Xi-Sheng(Wang Zhijiang Laser Innovation Center,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China;College of Material Science and Opto-Electronic Technology,University of Chinese Academy of Sciences,Beijing 100049,China;Shanghai Institute of Technical Physics,Chinese Academy of Sciences,Shanghai 200083,China)

机构地区：[1]中国科学院上海光学精密机械研究所,王之江激光创新中心,上海201800 [2]中国科学院大学材料科学与光电技术学院,北京100049 [3]中国科学院上海技术物理研究所,上海200083

出　　处：《红外与毫米波学报》2023年第6期845-852,共8页Journal of Infrared and Millimeter Waves

基　　金：Supported by the National Pre-research Program during the 14th Five-Year Plan(514010405)。

摘　　要：针对同时兼顾大范围搜索和精确识别目标的迫切需求,研制了一种大变倍比红外变焦成像系统,设计两片独立运动的变倍镜及一片补偿镜,通过两个变倍镜级联的方式获得大变倍比。结合系统运动镜片多及变焦曲线复杂的特点,采用直线运动机构实现镜片变焦运动,使用集成编码器及螺纹丝杆的直线电机作为驱动。通过有限元仿真开展了系统力学分析,所设计镜片最大位移为3.04×10^(-3)mm。成像系统适用于中波红外制冷式640×512焦平面阵列探测器,变倍比达到55倍。实验室成像及外场实景成像的结果表明,系统在焦距由6 mm至330 mm连续变化的过程中成像清晰、像质良好,验证了系统的连续变焦成像性能,该设计合理可靠。研究成果在搜索、跟踪、侦察、监视等方面有广阔的应用前景。In order to meet the urgent need of large-scale search and accurate target recognition,an infrared zoom imaging system with large zoom ratio is developed.Two independently moving zoom lenses and one compensat⁃ing lens are designed,the large zoom ratio can be obtained by the cascade of two zoom lenses.According to the characteristics of multiple moving lenses and complex zoom curves,the zoom motion is realized by linear motion mechanism,and driven by linear motor integrated encoder and thread screw rod.The mechanical analysis of the system is carried out by the finite element simulation,and the maximum displacement of the lenses is 3.04×10^(-3)mm.The imaging system is suitable for the medium-wave infrared cooled 640×512 focal plane area-array detec⁃tor,and the zoom ratio is 55.The results of laboratory imaging and outfield imaging show that the system has a clear and good imaging quality with a continuous change in focal length from 6 mm to 330 mm,which verifies the performance of the system.The design is reasonable and reliable.The research findings of this paper have broad application prospects in search,tracking,reconnaissance,and surveillance.

关 键 词：红外变焦成像系统 大变倍比 直线运动机构 直线电机 

分 类 号：TN216[电子电信—物理电子学]