All objects in nature with temperatures above absolute zero (-273.15°C) can radiate infrared energy, and the physical nature of infrared radiation is thermal radiation, which is also an electromagnetic wave.
The infrared thermal imager converts infrared thermal radiation into a corresponding electrical signal, which is then amplified and video processed to form a video image that can be observed by the naked eye. In layman's terms, this means that the invisible infrared radiation is turned into a visible thermal image, and can reflect the temperature distribution state of the target surface.
This thermal image corresponds to the heat distribution field on the surface of the object. Different colors on the thermal image represent different temperatures of the object being measured. By viewing the thermal image, the overall temperature distribution of the measured target can be visualized and the heat generation of the target can be studied so that the next step can be judged.
Infrared thermal imaging cameras are able to clearly observe the target to be monitored even at night when there is no light at all, or in harsh environments such as rain, snow and other dense clouds of smoke.
Currently, thermal imaging cameras are widely used in electric power, industry, agriculture, security, medical, firefighting, archaeology, transportation, geology and other civilian fields.