基于短波变F数系统的红外辐射定标规律研究

Research on Infrared Radiation Calibration Based on Shortwave Variable F Number System

在靶场辐射测量中,红外辐射特性数据被广泛应用于目标红外特性识别和隐身特性评估,在安防与军事领域发挥着不可替代的作用。目标红外辐射特性数据获取需基于系统的辐射定标。对于中、长波测量系统来说,红外辐射定标主要针对定焦系统,而对变焦系统的辐射标定较少。建立了连续变焦系统的红外辐射定标模型,并对1000 mm口径的短波连续变焦系统进行了分析。数据分析结果显示,随着F数的增大,系统的辐射响应增益减小。分析了其对辐射测量的影响。可以看出,该研究具有一定的工程意义。

Infrared radiation characteristic data is widely used in target infrared characteristic recognition and stealth characteristic evaluation in outfield,and it plays an irreplaceable role in the security and military fields.The acquisition of target infrared radiation characteristic data needs to be based on the system′s radiation calibration.For medium-and long-wave measurement systems,infrared radiation calibration is mainly for fixed-focus systems,but the radiation calibration for zoom systems is less.The model of the infrared radiation calibration was established for the continuous zoom system,and the short-wave continuous zoom system with 1000 mm aperture was analyzed.Data analysis results show that as the F number increases,the radiation response gain of the system decreases.The analysis of its influence on radiation measurement has certain engineering significance.