Abstract: A method for analyzing objects depending on their electromagnetic properties. The method including the steps of conveying the objects to be analyzed on a conveyer belt; scanning the electromagnetic properties of the objects and the conveyer belt by an electromagnetic sensor, wherein the electromagnetic properties of the conveyer belt are dependent on metallic contaminants which are stuck in the conveyer belt; generating belt properties data representing the electromagnetic properties of the conveyer belt, and analyzing the objects according to the scanned electromagnetic properties and the belt properties data. This has the benefits that the electromagnetic properties of the conveyer belt are considered when distinguishing between metallic and non-metallic objects which have to be sorted. This way, the objects which got stuck in the conveyer belt over time, may influence a sorting less, which may improve sorting results. Further, an apparatus for executing such a method.

Abstract: A method for analyzing objects depending on their electromagnetic properties. The method including the steps of conveying the objects to be analyzed on a conveyer belt; scanning the electromagnetic properties of the objects and the conveyer belt by an electromagnetic sensor, wherein the electromagnetic properties of the conveyer belt are dependent on metallic contaminants which are stuck in the conveyer belt; generating belt properties data representing the electromagnetic properties of the conveyer belt, and analyzing the objects according to the scanned electromagnetic properties and the belt properties data. This has the benefits that the electromagnetic properties of the conveyer belt are considered when distinguishing between metallic and non-metallic objects which have to be sorted. This way, the objects which got stuck in the conveyer belt over time, may influence a sorting less, which may improve sorting results. Further, an apparatus for executing such a method.

Abstract: A system of identifying and/or sorting of matter including an advancing device (101) for advancing the matter, a radiation emitting device (107) serving to emit radiation which is varied by the advancing matter, a detecting arrangement (103) serving to detect the varied radiation, and an analysing arrangement (106) serving to analyse the varied radiation. A spectral analyser (104) serves to detect the varied radiation in a plurality of narrow wavelength bands in the visible spectrum in order to determine the colour and/or composition of the matter. The system may also include another spectral analyser (105) operable in the invisible wavelength spectrum to analyse radiation which has been varied by the matter and is in the invisible wavelength spectrum. The system may further include a colour camera (102) and an arrangement which applies camera image interpretation to radiation which has been varied by the matter.