摘要
针对像元尺寸为50μm×50μm的长波红外32×32元制冷型凝视焦平面阵列探测器的需要,设计了一种工作波长位于15~35μm的透射式长波红外显微成像光学系统。该系统采用一次性成像方式,且主要由系列透镜构成,其中冷光阑置于光路的出瞳位置。通过对称双胶合透镜组合来校正像差,在-20~40℃温度范围采用光学被动补偿技术实现消热像差。仿真结果表明,当所设计的光学系统的中心波长、焦距、数值孔径、有效放大倍率和空间分辨率分别为27μm,14mm,0.25,10和0.1mm时,在10lp·mm^-1特征频率处调制传递函数(MTF)值达到0.369,系统包围圆能量集中度超过80%,能够得到清晰可辨的物像,满足对冷光学系统短结构、高分辨率的应用需求。
In this study,a transmission type long-wavelength infrared microscopic imaging optical system operating in wavelengths of 15--35μm is designed to meet the demand for cooled staring focal plane array detector containing long-wavelength infrared 32×32pixel elements and exhibiting an elemental size of 50μm×50μm.The designed system adopts disposable imaging and comprises a series of lenses.A cold diaphragm is positioned at exit pupil of the optical path.Symmetrical double gluing lens combination is introduced into the system to correct the aberration.Further,an optical passive compensation technique is employed to realize anti-thermal aberration at temperatures of-20℃to 40℃.The simulation results show that the designed system exhibits a modulation transfer function(MTF)value of 0.369and an encircled energy concentration of>80%at a characteristic frequency of 10lp·mm^-1 when its center wavelength,focal length,numerical aperture,effective magnification,and spatial resolution are 27μm,14mm,0.25,10,and 0.1mm,respectively.Furthermore,a clear distinguishable image can be obtained using the designed system.The designed system satisfies the requirement of short structure and high resolution of cold optical system.
作者
王宇
许阳阳
刘爱云
石旺舟
胡古今
牟浩
潘昌翊
邓惠勇
戴宁
Wang Yu;Xu Yangyang;Liu Aiyun;Shi Wangzhou;Hu Gujin;Mu Hao;Pan Changyi;Deng Huiyong;Dai Ning(Department of Physics,Shanghai Normal University,Shanghai 200234,China;State Key Laboratory for Infrared Physics,Shanghai Institute of Technical Physics,Chinese Academy of Sciences,Shanghai 200083,China)
出处
《光学学报》
EI
CAS
CSCD
北大核心
2020年第6期128-135,共8页
Acta Optica Sinica
基金
中国科学院前沿科学重点研究项目(QYZDJ-SSW-SLH018)
国家自然科学基金重大项目(11174307)
国家重点研发计划项目(2016YFB0402405)。
关键词
光学设计
长波红外制冷型探测器
双胶合透镜组
显微成像光学系统
仿真模拟
optical design
long-wavelength infrared cooled detector
double cemented lens group
microscopy imaging optical system
analog simulation
作者简介
胡古今,E-mail:hugj@shnu.edu.cn;邓惠勇,E-mail:hydeng@mail.sitp.ac.cn。
