摘要
搭建了辐射定标系统,使用高精度的面源黑体作为标准辐射源,对长波红外相机进行辐射定标实验。利用实测数据分析了面阵探测器的响应值与入射辐射、积分时间的关系,确定了辐射定标模型,并在此基础上提出了快速辐射定标方法,即选择2个温度对应2个积分时间组合下的3幅图像,通过数据处理可实现对辐射定标模型中的参数求解。最后,使用420组实测数据中的398组有效数据对该简化辐射定标模型进行了可靠性验证,结果显示,各温度下模型计算值与实测值相对误差均小于1%,拟合度均大于0.999。实验表明,该辐射定标方法在实现对不同积分时间快速定标的同时保证了辐射定标的精度。
Using high-accuracy extend blackbody as the standard radiation source, we set up the radiometric calibration system and perform a radiometrie calibration experiment for long wave infrared camera. Based on the practical response data, the relationship of response characteristics with incident radiation and integration time is analyzed, and a mathematical model of radiometric calibration is establish. Thereout, the fast radiation calibration method, which is choose of three pictures under two temperatures at two typical integral time, is proposed. The unknown parameters in the calibration model can be obtained by data processing. Finally, using 398 sets of available data from 420 sets of measured data, we verify the reliability of the simplified radiation calibration model. The results show that the relative error between the calculated and measured values is less than 1%, and the fitting degree is greater than 0. 999. Experiments show that the calibration method can ensure the accuracy of rapid radiation calibration under different integral time.
出处
《激光与光电子学进展》
CSCD
北大核心
2017年第12期419-427,共9页
Laser & Optoelectronics Progress
基金
国家林业公益性资助项目(201204515)
关键词
光电子学
红外焦平面阵列
辐射定标
面源黑体
积分时间
optoelectronics
infrared focal plane array
radiometric calibration
extend blackbody
integration time
