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辐射定标数据在目标辐射特性数据测量和仿真试验应用中均有重要作用。首先对焦距固定红外探测系统外场定标方法进行了初步分析。采用近距离直接扩展源法、远距离扩展面源法和平行光管定标法对焦距固定红外探测系统进行了定标实验研究。实验发现:近距离直接扩展源法对旋转的红外探测系统不适用;远距离扩展面源法对路径辐射、路径透过率和环境辐射修正较为困难;平行光管定标法操作较为麻烦,但考虑目标特性数据的有效性和实用性,需考虑平行光管定标。文中对焦距固定红外探测系统辐射外场定标技术改造研究、红外目标特性测量系统研制具有较大的参考意义。
Radiation calibration data plays an important role in the measurement of target radiation characteristics and the application of simulation experiments. First of all, a preliminary analysis of the field calibration method of the focal length fixed infrared detection system is carried out. The calibration experiment of focal length fixed infrared detection system was carried out by adopting the direct distance expansion near source method, the extended source surface method and the collimator calibration method. The experimental results show that the short-range extended source method is not suitable for rotating infrared detection system. The long-distance extended surface source method is very difficult to correct the path radiation, the path transmittance and the environmental radiation. The collimator calibration is troublesome. However, Considering the validity and practicability of the target characteristic data, the collimator calibration needs to be considered. In this paper, the focal field fixed infrared detection system radiation field calibration technology transformation research, infrared target characteristic measurement system has great reference significance.