摘要
针对复杂环境下远距离点目标弱目标探测的需求,设计了红外双波段双视场成像告警系统。为提高其目标探测能力以及环境适应能力,该系统采用高阶非球面,减少系统镜片数量,提高系统透过率,同时校正轴上、轴外像差及高级像差,提高系统成像质量;采用光学被动消热差方式,实现了光学系统-40~60℃的无热化设计。采用旋转电磁铁为驱动元件,实现了80 ms大/小视场切换速度以确保目标在视场切换过程中不丢失。采用电限位、机械限位以及磁力锁紧机构作为限位组件,实现了大/小视场切换后光轴晃动小于两个像素的稳定精度。设计结果表明,该红外成像告警系统光机结构设计合理、结构紧凑、成像质量好,满足目标探测要求,在红外成像告警领域具有较好的应用前景。
To address the demand for detection of point/dim targets in complex environments, an infrared dual-band dual-field of view(FOV) imaging early warning system was designed. To improve the target detection capability and environmental adaptability, the system used high-order aspheric surfaces to reduce the number of system lenses and improve the system transmittance. At the same time, it corrects on-axis/off-axis aberrations and advanced aberrations to improve the imaging quality of the system. An optical passive compensation method was adopted to realize an athermalized design in the range of-40 ℃ to 60 ℃. A rotating electromagnet was used as the driving element to complete the zooming in process in a duration of 80 ms to ensure that the target is not lost during the FOV switching process. Using the electric limit, mechanical limit, and magnetic locking mechanism as limit components, the stabilization accuracy of the optical axis wobble is less than two pixels.The design results show that the optical-mechanical structure of the infrared imaging early warning system is reasonable and compact, the imaging quality is good, and it meets the requirements of target detection.The system has potential application prospects in the field of infrared imaging in early warning systems.
作者
张洪伟
丁亚林
马迎军
陈卫宁
ZHANG Hong-wei;DING Ya-lin;MA Ying-jun;CHEN Wei-ning(Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;University of Chinese Academy of Sciences,Beijing 100049,China;Xi′an Institute of Optics and Precision Mechanics,Chinese Academy of Sciences,Xi′an 710119,China)
出处
《光学精密工程》
EI
CAS
CSCD
北大核心
2020年第6期1283-1294,共12页
Optics and Precision Engineering
基金
国家自然科学基金青年项目(No.51905529)
陕西省自然科学基础研究计划资助项目(No.2019JQ-295)。
关键词
光学设计
双波段系统
双视场系统
旋转电磁铁驱动
光轴精度
optical design
dual-band system
dual-FOV system
rotary electromagnet drive
optical axis accuracy
作者简介
张洪伟(1987-),男,河北衡水人,博士研究生,助理研究员,2014年于西安交通大学获得硕士学位,主要从事机载光学遥感器光机系统设计方面的工作。E-mail:xjtuzhw@foxmail.com;通讯作者:丁亚林(1964-),男,吉林长春人,硕士,研究员,博士生导师,1987年于吉林工业大学获得学士学位,1994年于东北大学获得硕士学位,主要从事航空相机总体设计方面的研究。E-mail:dingyl@ciomp.ac.cn。
