大气传输引起的红外图像退化分析  

Analysis of infrared image degradation by aero transmission

作　　者：李咏豪[1] 姜会林[2] 周娜[2] 

机构地区：[1]北京特种车辆研究所,北京100072 [2]长春理工大学光电工程学院,吉林长春130022

出　　处：《红外与激光工程》2010年第4期589-592,626,共5页Infrared and Laser Engineering

基　　金：国家自然科学基金资助项目(60977001);国家高技术研究发展计划(2007AA12Z110)

摘　　要：分析并仿真了大气传输引起的红外图像退化。从大气湍流和气溶胶散射、吸收的物理过程入手,分析了大气调制传递函数(MTF)及其造成的图像退化。提出了大气作用效果的计算机仿真方法,在目标距离为1 km、离地高度2 m、Cn2=1.0×10-13 m-2/3、光学系统为f/4.0、f=600 mm的情况下,针对远距离水平传输方向的红外成像系统进行了大气作用效果仿真。结果表明:大气传输引起的红外图像退化主要体现在由湍流引起的程度不同的局部模糊及图像跳动。The analysis and simulation of the infrared image degradation by aero transmission were presented.The atmosphere MTF and the degradation effects of the image were pointed by analyzing the physical process of atmospheric turbulence,aerosol scattering and absorption.The simulation methods of the atmospheric effects were presented,and the computer simulation of atmospheric effects was done for the infrared imaging system of long-distance horizontal transmission on condition that the target distance was 1 km;the height above ground was 2 m;C2n =×1.0×10-13 m-2/3,optical system is f/4.0 and f=600 mm.The simulation results show that the infrared image degradation caused by aero transmission are mainly focused on the local fuzzy and image dithering in various degree caused by atmosphere turbulence.

关 键 词：大气调制传递函数 红外仿真 湍流 散射 吸收 

分 类 号：TN929.12[电子电信—通信与信息系统]