Leaflet and Label Query of Pharmaceutical Products with Luminescence Sensors
When packaging pharmaceutical products, it is mandatory to reliably verify the presence of leaflets and labels in and on the packaging. In order to ensure that these elements are authentic, luminophores, i.e. light-emitting substances, are added to the paper beforehand. Thus, the paper emits UV light, which is invisible to the human eye. A luminescence sensor is able to reliably detect this light at a specific wavelength and thus confirm authenticity. Counterfeits are thus revealed quickly and high security standards are maintained.
Luminescence sensors emit UV light at a certain wavelength. If the emitted light strikes a luminescent object, it reflects within a visible wavelength range in accordance with the luminescent substance mounted. The sensors use this effect to make markings on labels visible, for example.