外场用红外目标模拟器辐射特性测量研究

野外便携式红外目标模拟器作为红外目标辐射源,广泛应用于各军兵种武器装备的效能测试评估中.针对外场模拟辐射源不能精确标定的问题,采用标准面源黑体和红外傅里叶光谱辐射计相结合标定的方法,对红外模拟器特定温度下的光谱辐亮度进行测量,计算出感兴趣波段的积分辐亮度,根据模拟器辐射面积给出用户需要的模拟器各设定温度下的辐射强度.分析计算表明:计算出的感兴趣波段的积分辐亮度值和理论曲线相比较,取得了良好的一致性,间接验证了该方法的正确性.

Radiation characteristics of IR target simulator used in field

As an IR target radiation source, portable IR target simulator is widely used in field to evaluate the performance of defense electro-optical system. Since IR target simulator in field couldn't be calibrated accurately, a new method which uses standard IR extended source blackbody and Fourier spectroradiometer to make calibration is presented. The spectral radiance for IR simulator was measured at a given temperature. Then the integral radiance was calculated in the interested wave band. Finally, based on the radiant area of IR simulator, the radiant intensity was calculated at various given temperatures. Experimental results show that the measured radiance curve is consistent with the theory curve in the interested wave band, and the measurement method is proved.