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Präzise Messtechnik für komplexe Mehrschichtfolien

Precise measurement technology for complex multilayer films
: Hölters, S.; Overbeck, J.; Ederleh, L.; Michaeli, W.; Lenenbach, A.; Noll, R.

Coating international 43 (2010), No.9, pp.6-12
ISSN: 0590-8450
Journal Article
Fraunhofer ILT ()

The Fraunhofer Institute for Laser Technology (ILT) and the Institute of Plastics Processing (1KV) in Aachen, Germany, are collaborating to develop a precise measurement technology for complex multilayer films. The project has been undertaken by them as part of the IRIS project funded by the German ministry of economics and technology (BMWi). The project aims at developing a laser sensor that can measure individual layer thicknesses in the micrometer range on production lines. It is observed that such inline measurement ensures high process reliability in the film manufacturing process, enabling the implementation of a control concept in film processing plants and equipment. The laser sensor utilizes light in the near-infrared range to optically measure individual layer thicknesses and its light is nonhazardous and operates without the need for safety measures. An optical fiber and a compact measuring head are also used to aim the measurement radiation at the film from a distance of a few centimeters.