The particular strength of these hyperspectral systems is their spectral resolution: with the aid of the transmission properties of long-wave light, contamination of the heat-sealed packages can be reliably detected even through printed plastic films. The prerequisite for this is that the covering plastic material is transparent to light in the SWIR range. The seal inspection at Bergader thus represents a perfect application case: imperfections or undesirable substances are reliably identified through the sealing film.
Minebea uses Specim FX17 as a part of a larger system that also includes lighting, data acquisition equipment, analysis software, and other, more traditional imaging systems. Hyperspectral imaging equipment can be integrated into other inspection methods, and, as a result, it provides results that cannot be achieved with any other method.
Markus Leibold is particularly proud of the heat-sealing inspection based on hyperspectral technology: “This system, which is unique to date, represented the perfect solution for our requirements. With it, we have been able to achieve the desired cycle speed of around 145 inspections per minute and attain virtually 100% reliability in the detection of heat-sealed joint faults.”