In semiconductor production or in the chemical industry, many processes take place in closed reactors that are difficult to access. Here, too, permanently increasing production speeds and quality requirements demand continuous optimisation of processes and sequences. Real-time monitoring of the processes taking place in combustion chambers, for example, can only be carried out remotely. To check these processes, an endoscope is often inserted into the reactor with a high-resolution camera head at the end of which (outside the reactor) is the camera control unit, which archives the images and simultaneously sends them directly to a computer for further processing.