Thermography (Thermographic Imaging)

    Thermography, or thermal imaging, is a type of infrared imaging. Thermographic cameras detect radiation in the infrared range of the electromagnetic spectrum (roughly 900-14,000 nanometers or 0.9-14 µm) and produce images of that radiation.

     The most commonly used ultrasonic testing technique is pulse echo wherein sound is introduced into the test object and reflections (echos) are returned to a receiver from internal imperfections or from geometrical surfaces of the part.

    Since infrared radiation is emitted by all objects based on their temperatures, thermography makes it possible to "see" one's environment with or without visible illumination.

     The amount of radiation emitted by an object increases with temperature, therefore thermography allows one to see variations in temperature (hence the name).

     When viewed by thermographic camera, warm objects stand out well against cooler backgrounds and cool objects stand out well against warm backgrounds.