Screening device, method for carrying out an active in thermography - for the testing of materials, as well as the use of

摘要

The present invention relates to a screening device (1) for screening an area under observation of a workpiece (3) in front of a secondary excitation radiation (4) during an active in thermography - for the testing of materials with a thermal excitation of the workpiece (3) in a stimulation range by means of a primary excitation radiation. The screening device (1) has a screen segment (6) for positioning between the observation area (2) of the workpiece (3) and an elevation, wherein the screen segment (6) a high transmissivity for the primary excitation radiation (5) comprises. The screen segment (1) has no or a low transmissivity for the secondary excitation radiation (4) on.The present invention also relates to a method for carrying out an active in thermography - for the testing of materials, as well as the use of.