目标红外辐射特性测量定标方法研究

阐述了定标工作在目标红外辐射特性测量中的重要作用。分别就调焦类成像设备和非调焦类成像设备的定标方法进行了理论分析,针对不同定标方法的优缺点进行了说明,定标时通常采用0米定标,方便且可同时进行所有像元定标。对目标特性测量时定标温度的选择作了分析,得出结论:定标间隔不变时,定标误差随定标温度呈"W"型规律变化,当定标温度分布于测量温度两侧时,误差有限,因此定标温度通常选择在目标等效黑体温度两侧,且定标温度间隔越小辐射特性测量精度越高。

Study on calibration method of target infrared radiation characteristic measurement

Calibration plays an important role in infrared characteristic measurement.Calibration method of fixed-focus imaging sensor and adjustable focus imaging sensor are theoretically analyzed.Merits and demerits of different calibration methods are introduced.Zero meter calibration method is usually selected,it is convenient and can calibrate all pixels.The selection of calibration temperature is analyzed in target IR characteristic measurement,analysis results show that:when calibration temperature interval is constant,the calibration error changes along "W" shape with calibration temperature;The calibration error is limited when calibration temperature distributes both sides of measurement temperature,so calibration temperature is selected on both sides of equivalent blackbody temperature,and calibration error is smaller when calibration temperature interval is smaller.