Method for determining the coating thickness of a medium to be applied

摘要

The invention relates to a method for determining the coating thickness of a medium which is to be applied on a coating support inside a protective surface finishing unit. Output signals and reflection signals are used in this case to determine a signal difference. The invention is characterised in that both at a surface (14) of a medium (19) and at an interface (13) between the medium and a coating support (3, 4) an output signal (17) generates reflection signals (15, 16) from the behaviour of the transit time (propagation time) of which it is possible to determine the layer thickness (12) of the medium (19). <IMAGE>