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1 前言 红外波段的(3～5)μm和(8～14)μm波长大气透射率好,被称为大气窗口。地球上的所有物体都发出热辐射(电磁波),通常其中心波长位于红外波段。在用此波长将常温下的物体映像化时,要求能探测0.1K以下的温差。用红外方式拍摄这种微小温度差时,其对比度要比可见光摄像低。光学系统影响探测分辨率
1 Introduction Infrared (3 ~ 5) μm and (8 ~ 14) μm wavelength atmospheric transmittance, known as the atmospheric window. All objects on Earth emit radiant heat (electromagnetic waves), usually at the central wavelength in the infrared band. When using this wavelength to map an object at normal temperature, it is required to detect the temperature difference below 0.1K. When shooting this tiny temperature difference in infrared mode, its contrast is lower than that of visible light. Optical system affects the detection resolution