Particularly in the automotive industry, extremely high demands are placed on product quality. Confocal chromatic sensors from Micro-Epsilon enable highly accurate inspection of ultra-fine surface structures. The IFS2407-0,1 sensors are used, for example, for measuring the roughness of brake discs. The disc is smooth, polished and often shiny, with surface structures almost imperceptible to the human eye. These ultra-fine structures become clearly visible only under a microscope. These surface structures are required to create friction and to ensure a high braking force even after numerous braking manoeuvres.
Another sensor in the confocal range from Micro-Epsilon is the IFS2407/90-0.3. This has a lateral 90° beam path, which means it is particularly suitable for special installation scenarios, for example, when inspecting automotive cylinder liners. The axial beam path of the confocal sensors avoids shadowing effects, enabling measurements even in sleeves and recesses. High precision measurements with tilted objects are also possible.
Confocal chromatic measurement systems are used for micrometer precise displacement, distance measurements and intensity evaluation. Based on the determination of the distance, surface topographies of objects can be obtained. Unevenness and scratches influence the degree of reflectance causing a change of the signal intensity. Therefore, an exact image of the target and its fine structures is produced.