基于系统热辐射相消的大口径宽动态红外辐射测量研究  

Large-aperture high dynamic infrared radiation measurement technology based on system thermal radiation differential

作　　者：李素钧 谷牧 彭翔[1,2,3] 赖雪峰 周金梅[1,2,3] LI Sujun;GU Mu;PENG Xiang;LAI Xuefeng;ZHOU Jinmei(Key Laboratory of Science and Technology on Space Optoelectronic Precision Measurement,Chinese Academy of Sciences,Chengdu 610209,China;National Laboratory on Adaptive Optics,Chengdu 610209,China;China Institute of Optics and Electronics,Chinese Academy of Sciences,Chengdu 610209,China)

机构地区：[1]中国科学院空间光电精密测量技术重点实验室,四川成都610209 [2]自适应光学全国重点实验室,四川成都610209 [3]中国科学院光电技术研究所,四川成都610209

出　　处：《红外与激光工程》2025年第2期11-20,共10页Infrared and Laser Engineering

基　　金：国家自然科学基金项目(42304192)。

摘　　要：为获取机动目标在不同运动阶次下的辐射信息,大口径宽动态成为辐射测量系统的重点发展方向。辐射定标是辐射测量的基础,大口径宽动态测量系统通常采用平行光管定标法,但存在体积大、造价高等问题,而分布基准级联式定标因其机动性强、造价相对较低逐渐被采用。分布基准级联式定标是指采用腔式黑体对系统进行部分光路的中、高温定标,采用大面源黑体对系统进行全口径全光路的中、常温定标,利用全光路定标数据对部分光路定标数据进行修正获得全系统的宽动态定标系数。通过大面源黑体近距离正对系统入瞳进行定标时,黑体热辐射以及环境温度的变化导致系统光机结构温度发生显著变化,严重制约测量精度。为解决这一难题,首先分析了系统温度变化导致测量精度恶化的机理,在此基础上提出系统热辐射相消方法,即在辐射定标、辐射测量时分别同步采集均匀背景下的热辐射图像,与定标图像、测量图像进行差分。在分布基准级联式定标的基础上,利用该模型对某450 mm口径的红外辐射测量系统进行相关实验,辐射定标辐射量误差最大为1.58%,辐射测量辐射量误差最大为4.34%,实验结果表明,该模型有效增强红外辐射测量系统环境温度适应性的能力、提升红外辐射测量精度。Objective Infrared radiation characteristic measurement is one of the fundamental technologies for obtaining target infrared radiation characteristics,target infrared detection and recognition,and target infrared stealth evaluation.The rapid development of new offensive and defensive technologies requires infrared radiation measurement system to develop direction of large aperture,high dynamic,and high precision.Infrared radiation measurement accuracy of the system is affected by many factors such as environmental temperature,calibration error,atmospheric correction error,and detector stability.How to perform high-precision large aperture and high dynamic calibration on the measurement system,and how to compensate for the impact of environmental temperature changes on measurement accuracy are urgent technical difficulties that need to be solved.Therefore,based on the distributed reference cascade calibration,Aiming at the influence of external environment on measuring system temperature,the differential model of system thermal radiation is proposed to suppress the influence of system temperature change,improve the calibration accuracy,measurement accuracy,and environmental temperature adaptability of the calibration results.Methods This paper takes the distributed reference cascaded calibration method as the basis,analyzes the mechanism of the calibration error and measurement error caused by temperature change in the infrared radiation measurement system,and establishes a simple and feasible system thermal radiation differential model.Based on the uniform background with known radiation quantity,the system thermal radiation is differentiated during the calibration and measurement process to suppress the influence of system thermal radiation change on measurement accuracy.Based on a 450 mm aperture radiation measurement system,relevant experiments are conducted to verify the high dynamic measurement accuracy under different environmental temperatures.Results and Discussions In response to the demand for large ape

关 键 词：大口径 宽动态 分布基准级联式定标 系统热辐射相消 环境温度适应性 

分 类 号：TN215[电子电信—物理电子学]