Simply put, the principle of thermal imager is to use temperature imaging to convert invisible infrared energy emitted by objects into visible thermal images. Different colors on the thermal image represent different temperatures of the measured object.
As long as the objects in nature are above absolute zero (-273℃), they will continuously radiate infrared rays. The thermal imager converts infrared radiation on the surface of an object into visible light images through an optical system, an infrared detector chip and an electronic processing system.
Thermal imager has the advantages of being unaffected by visible light, clear imaging for 24 hours, non-contact temperature measurement, smoke and fog permeability, and can be applied to human body temperature measurement, industrial temperature measurement, automatic driving, fire safety, outdoor observation and so on. There are hand-held, online and mobile cameras, and their use methods are different.