DEVICE FOR THE CONTACTLESS AND NON-DESTRUCTIVE TESTING OF A SURFACE BY MEASURING ITS INFRARED RADIATION

摘要

A device (100) for the contactless and non-destructive testing of a surface (106) by measuring its infrared radiation thereof comprises an electromagnetic radiation source (1) adapted to emit excitation radiation which can be directed onto the surface (106) to be tested (26), a detector (9) arranged on a detection axis (25) directed towards said surface (106) and a first IR filter medium (2) provided between the radiation source (1) and the surface (106). In response to radiation impinging onto the surface (106), detection radiation is emitted by the surface (106) and fed to the detector (9). At least a second filter medium (3) is provided between the first filter medium (2) and the surface (106) to be tested (26), wherein a space (24) is provided between the first and the second filter medium (2, 3) creating a coolant channel for a cooling fluid circulation (4) and wherein the coolant channel is connected to a coolant drive for actively exchanging the fluid for the cooling fluid circulation (4).