August 13th, 2020
by Michael Vollmer | Klaus-Peter Mollmann
In this field, the word “infrared” is often replaced by “thermal”, so that one usually speaks of thermal cameras and thermal images.
This basically positive development however creates some problems, in particular since the false-color images must be interpreted correctly. There are many traps lurking here, and we demonstrate some of them using examples. For this reason, several businesses and also the camera manufacturers offer training and certification courses on the fundamentals and applications of thermography . To be sure, such courses cost as much as the less expensive cameras, so that some “services” dispense with the course and nevertheless offer thermographic analyses.
This is where the problem begins, as measurements carried out with an IR camera can be traced back to a variety of different sources of thermal radiation. Here, in addition to the object being investigated, the environment and even the camera itself play a role. In addition, there is a large number of possible error sources in recording and interpreting thermal images . These can be avoided or corrected only by users who have a precise knowledge of the underlying thermal and radiation transport mechanisms. Untrained users, on the other hand, often simply produce colorful pictures.