基于加权最小二乘法的红外辐射定标  

Radiance Calibration Based on Weighted Least Square Method

作　　者：张云峰[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033

出　　处：《液晶与显示》2012年第6期832-836,共5页Chinese Journal of Liquid Crystals and Displays

摘　　要：随着红外物理与红外技术的深入发展,目标的辐射特性测量受到了广泛的重视,红外探测器的辐射定标直接决定了辐射特性测量精度,为此文中建立了辐射定标系统,对3～5μm的红外焦平面阵列相机进行了绝对辐射定标实验。文中给出了辐射定标的数学模型,制定了定标的流程并进行了相应的辐射定标实验;针对红外标准源和环境波动性的影响,提出了加权最小二乘法的辐射定标优化方法;通过外场辐射特性测量实验表明,该方法的反演误差优于4%,提高了辐射定标的精度,结果满足实际工程的需要。With the in-depth development of the infrared physics and infrared technology,the measurement of target radiation characteristics is widely appreciated.And the infrared detector radiometric calibration is a fundamental work.This paper establish a radiometric calibration system,the absolute radiometric calibration of the 3~5 μm infrared focal plane arrays.Firstly,give the radiometric calibration mathematical model,developed a calibration process and the radiometric calibration experiment.As infrared standard source and the impact of environmental volatility,a weighted least squares radiation calibration optimization is proposed.The radiation characteristic measurement experiment was carried out outside the field.Results show that the inversion error of optimization method is better than 4%.The accuracy of radiometric calibration was improved.And the results meet the actual needs of the project.

关 键 词：红外焦平面阵列 辐射定标 加权最小二乘法 辐射特性测量 

分 类 号：O432[机械工程—光学工程]