摘要
在利用红外目标模拟器对红外成像系统进行性能检测和定标之前，需要先对其输出的有效辐射进行校准，而现有的辐射校准方法没有考虑到红外目标模拟器自身光机结构所产生的背景辐射。建立了考虑到红外目标模拟器背景辐射的辐射校准模型，可同时确定红外目标模拟器中平行光管的透过率和背景辐射，并据此得到红外目标模拟器的有效辐亮度。分析了该校准方法的不确定度，在3．7～4．8μm、8～9．2μm波段分别为4．2％、3．5％。最后，利用中波和长波红外相机，对由HFY-302B黑体和LPS300离轴平行光管组成的红外目标模拟器在3．7-4．8μm、8～9．2μm波段的有效辐射进行校准实验，给出了辐射校准结果。
Before performing performance detection and calibration on an infrared imaging system using the infrared tar- get simulator, it is necessary to calibrate the effective radiation of the simulator. The existing radiation calibration meth- ods do not consider the background radiation generated by the optical and mechanical mechanism of the infrared target simulator itself. A simulator radiation calibration model considering the background radiation of the infrared target simu- lator itself was established, which can determine the transmittance of the collimator in the simulator and the background radiation of the simulator, and obtain the effective radiance of the simulator. The uncertainty of the calibration method was analyzed ,which is about 4.2% at the waveband of 3.7-4.8 μm and about 3.5% at the waveband of 8-9.2 μm. A radiation calibration experiment was performed on the simulator consisting of the HFY-302B blackbody and the LPS300 off-axis collimator using a midwave infrared camera operating at the waveband of 3.7-4.8 μm and a longwave infrared camera operating at the waveband of 8-9.2μm, and the calibration results are given.
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2013年第9期2045-2050,共6页
Chinese Journal of Scientific Instrument
基金
国家自然科学基金(50902128)资助项目
关键词
红外目标模拟器
透过率
背景辐射
辐射校准
黑体
infrared target simulator
transmittance
background radiation
radiation calibration
blackbody
