Why is the long-wave infrared system suitable for detecting targets at room temperature (primarily t
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- Aug 2,2021
![Why is the long-wave infrared system suitable for detecting targets at room temperature (primarily t](https://icdn.tradew.com/file/202102/1574789/png/7584707.png?x-oss-process=image/quality,Q_90)
The total radiation emitted by the target in the mid-wave infrared and long-wave infrared bands can be obtained by integrating the Planck formula. At different temperatures of the target, the total infrared radiation in the medium-wave and long-wave bands is shown in the left figure below; the ratio of the total infrared radiation of the two to the target temperature change is shown in the right.
![](https://icdn.tradew.com/file/202102/1574789/jpg/7584666.jpg?x-oss-process=image/quality,Q_90)
It can be seen from the figure that when the temperature of the target is lower than 575K, the long-wave infrared radiation is stronger than the medium-wave infrared radiation, especially when the temperature is around 300K, the long-wave radiation energy is nearly 20 times that of the medium-wave radiation