摘要
设计了一款能实现全天候清晰成像的全景监控摄像光学系统。采用全景环带结构形式,该结构分为摄像头部单元和中继透镜单元两部分,摄像头部单元完成全视场目标搜索,中继透镜单元将头部单元所成的中间虚像进行二次成像会聚到探测器上。设计时采用多重结构优化方式,实现可见光及近红外双波段成像。该光学系统视场为360°×(40°~100°),焦距为-2.75 mm,F数为3.28。设计结果表明:系统的MTF(modulation transfer function)值在全视场处接近衍射极限,各个视场的弥散斑半径均小于所选CCD像元尺寸,畸变小于2%,且日夜离焦量小于0.002 mm,该设计结果可满足全天候全景监控需求。
An optical system for panoramic surveillance cameras that can achieve clear all-weather imaging was designed.A panoramic annular structure was adopted,which was divided into two parts:camera head unit and relay lens unit.The camera head unit completed the full field of view target search,and the relay lens unit performed secondary imaging of the intermediate virtual image formed by the head unit and converged it on the detector.The design adopted multiple structural optimization methods to achieve visible light and nearinfrared dual band imaging.The field of view of the optical system is 360°×(40°~100°),the focal length is−2.75 mm,and the F number is 3.28.The design results show that the modulation transfer function(MTF)value is close to the diffraction limit at the full field of view,the diffuse spot radius of each field of view is less than the selected CCD pixel size,the distortion is less than 2%,and the day-night defocus amount is less than 0.002 mm,which can meet the requirements of all-weather and panoramic surveillance.
作者
王晓檬
陈宇
王春艳
赵义武
孙昊
刘欢
张桐
WANG Xiaomeng;CHEN Yu;WANG Chunyan;ZHAO Yiwu;SUN Hao;LIU Huan;ZHANG Tong(School of Opto-electronic Engineering,Changchun University of Science and Technology,Changchun 130022,China;Changchun Branch,China Mobile Communications Group Jilin Co.,Ltd.,Changchun 130022,China)
出处
《应用光学》
CAS
北大核心
2023年第3期484-490,共7页
Journal of Applied Optics
基金
吉林省自然科学基金(20200201185JC)
吉林省科技发展计划项目(20200401048GX)
长春理工大学青年科学基金(XQNJJ-2018-08)。
关键词
全景环带镜头
宽波段
大视场
光学系统设计
panoramic annular lens
wide band
large field of view
optical system design
