摘要
针对现有多波段成像系统体积大、功耗高和集成化设计困难的问题,本文提出了一种基于单传感器的三波段共口径成像光学系统的设计方法。首先,在光学系统的光阑处设计1×2多波段透镜阵列,把可见光波段和短波红外波段同时成像在一个像平面上,并把两个波段中心波长的成像位置偏差控制在一个像元内以实现双波段融合成像。然后,针对双波段成像衍射极限不同的问题,提出分通道透镜阵列的离轴偏移量和通光口径大小联合优化方法,并采用双电动光阑高速控制三个成像通道的切换速度。最后,设计了一个基于单传感器的焦距为30 mm,工作波段分别为480~900 nm、900~1700 nm和480~1700 nm的三波段共口径光学系统。设计及分析结果表明该系统具有成像质量好、结构紧凑、无运动光学元件、成像波段切换速度快等优点。
The existing multi-band imaging system has the problems of large volume,high power consumption,and difficulty in integrating design.To address these challenges,we proposed a three-band co-aperture imaging optical system based on single sensor.First,a 1×2 multi-band lens array in the aperture stop of the optical system is designed.This array effectively captures both the visible and short-wave infrared bands simultaneously in a single image plane.In addition,the imaging position deviation of the center wavelength of both bands are controlled within one pixel,resulting in dual-band fusion imaging.To address the issue of different diffraction limits in multi-band imaging,we propose to use the joint optimization method to simultaneously control the off-axis offset and aperture size of the split channel lens array.On the above basis,we sug-gest utilizing a dual electric diaphragm to control the switching speed of the three imaging channels.Finally,a three-band co-aperture optical system based on single sensor with a focal length of 30 mm and operating bands ranging from 480 to 900 nm,from 900 to 1700 nm,and from 480 to 1700 nm is designed.The system exhibits multiple advantages,such as excellent imaging quality,a compact structure,no moving optical ele-ments,and a rapid switching speed of the imaging band,as indicated by the design and analysis results.
作者
张坤
李京宸
孙思
谌庆荣
杨帆
ZHANG Kun;LI Jing-chen;SUN Si;CHEN Qing-rong;YANG Fan(Institute of Optics and Electronics,Chinese Academy of Sciences,Chengdu 610209,China;National Key Laboratory of Optical Field Manipulation Science and Technology,Chinese Academy of Sciences,Chengdu 610209,China)
出处
《中国光学（中英文）》
EI
CAS
CSCD
北大核心
2024年第2期382-389,共8页
Chinese Optics
基金
四川省自然科学基金(No.2023NSFSC1308,No.2023NSFSC0491)
四川省重点研发项目(No.2022YFG0249)
中国科学院光电技术研究所前沿布点项目(No.C21K003)。
