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热成象指对某一景物发射或反射的红外辐射进行可见光成象的技术。本文所指红外辐射通常为3～14微米波段的电磁辐射。它们是-64～+692℃的物体的峰值黑体发射的波长。由于大气吸收,热成象一般限于3.5～5和8～14微米波段。热成象和其他成象有两个区别。首先是,红外辐射探测器所探测的景物的光子能量,大致和探测器自身的光子能量相同。因此,优质的红外探测器必须致冷,以通过降低有关波长上的内光子流而减少噪声。其次,要探测的热景物是由约为300°K的大面积均匀
Thermal imaging is the technique of visible imaging of infrared radiation emitted or reflected by a scene. This article refers to the infrared radiation is usually 3 to 14 microns band electromagnetic radiation. They are the wavelengths of the peak blackbody emission for objects at -64 to +692 ° C. Thermal imaging is generally limited to 3.5-5 and 8-14 micron bands due to atmospheric absorption. There are two differences between thermal imaging and other imaging. The first is that the photon energy of the scene detected by the infrared radiation detector is approximately the same as the photon energy of the detector itself. Therefore, good infrared detectors must be cooled to reduce noise by reducing the internal photon flux at the wavelength involved. Second, the thermal profile to be detected is a large area of about 300 ° K uniform