Considering the main objectives of thermographic techniques and the particular characteristics of passive infrared detection, the essential arguments in favor of single detector scanners have been pointed out after a brief discussion of the detection and image pickup methods when quantitative and precise (0.1 degrees C) information on the temperature distribution near ambient temperature must be obtained. Single detector scanners can have sufficiently good performance to reach the objectives of precise thermography, but their real technical limits must be well-known in practice; consequently, the thermograph performance must be clearly defined by means of the modulation transfer function, the intrinsic thermal resolution and the response uniformity, as we indicate in the second part of this paper.
考虑到热成像技术的主要目标以及被动红外检测的特殊特性，在简要讨论了检测和图像采集方法后，指出了支持单探测器扫描仪的基本论点，此时必须获取关于接近环境温度的温度分布的定量且精确（0.1摄氏度）信息。单探测器扫描仪可以具有足够好的性能以实现精确热成像的目标，但在实践中必须清楚地了解其实际技术限制；因此，正如我们在本文第二部分所指出的，热成像仪的性能必须通过调制传递函数、固有热分辨率和响应均匀性来明确界定。
