About Thermography:

Thermography is the use of an infrared imaging and measurement camera to "see" and "measure" thermal energy
emitted from an object. Thermal, or infrared energy, is light that is not visible
because its wavelength is too long to be detected by the human eye; it's the part of the electromagnetic spectrum that we perceive as heat. Unlike visible light, in the infrared world, everything with a temperature above absolute zero emits heat. Even very cold objects, like ice cubes, emit infrared. The higher the object's temperature, the greater the IR radiation emitted. Infrared allows us to see what our eyes cannot.
Infrared thermography cameras produce Images of invisible infrared or "heat"radiationand provide precise non-contact temperature measurement capabilities. Nearly everything gets hot before it fails, making infrared cameras
extremely cost-effective, valuable diagnostic tools in many diverse applications. And as industry strives to improve manufacturing efficiencies, manage energy, improve product quality, and enhance worker safety, new applications for infrared cameras continually emerge.