Pulse Thermography (PT)

Fundamental for pulse phase thermography is the disturbance of the thermal equilibrium for a short period of time (typically a few 1/1000 seconds) with an energy impulse. The thermography camera takes image sequences after the pulse and the decay behaviour is analysed for every pixel. The pulse excitation is realised with powerful flash lamps. The temperature jump has to be high enough to track the decay in an optimal way. The thermal load of the surface immediately after the pulse is higher than with lockin methods.