Method and device for the identification of materials

摘要

The invention relates to a method and a device for the identification of materials. The materials are exposed to laser energy and the heat radiation of the materials is, after heating is complete, measured and evaluated in a manner specific to the material in respect of optical and thermal material properties. At least one point of the surface of the workpieces to be identified is exposed to the laser energy at a point and for a short time. The heat impulse reply of the material characteristic of the surface region exposed is measured in terms of position and time and evaluated in respect of the type of material.