热成象系统性能的估算,由于需要计算普朗克辐射函数的温度导数的积分而变得复杂了。当系统采用光子探测器时,可用资料提供的近似求解法,以在辐射计算尺算出的函数求此积分值。当目标和背景温度接近300K时,这一近似求解法适用于(?) Estimating the performance of a thermal imaging system is complicated by the need to calculate the integral of the temperature derivative of the Planck's radiation function. When the system uses a photon detector, the approximate solution provided by the data can be used to calculate the integrated value as a function of the radiation calculation rule. When the target and background temperature are close to 300K, this approximate solution applies to (?)