Method and an apparatus for detecting leaded pieces of glass

An apparatus comprising:

• a substantially monochromatic UV light source, with which a single-layer material flow of objects of predominantly waste glass can be illuminated;
• a first detector for detecting the fluorescent light generated by the UV light source in the object;
• a second light source which is capable of emitting light in the visible range or infrared light outside of the wavelength range of the fluorescent light;
• a second detector for detecting the transmission light of the visible or infrared light after passing through the object;
• a device for producing a single-layer material flow of waste glass, with which the material flow can be guided past the UV light source and the second light source;
• and
• a device for sorting out leaded glass pieces, which will sort out an object when both fluorescent light is present in a predetermined intensity range for at least one predetermined wavelength range corresponding to the fluorescence of leaded glasses and when transmission light in a predetermined intensity range with an intensity of larger zero is also present, the device comprising an evaluation and control unit receiving detection data from the first detector and from the second detector and programmed to determine from the detection data if the object should be sorted out.