ILLUMINATION DEVICE AND SENSOR FOR CHECKING VALUABLE DOCUMENTS

摘要

The invention relates to a sensor for checking valuable documents, comprising an illumination device for illuminating a valuable document, an optical imaging element and a detection device. The illumination device of the sensor contains a light source receiving element comprising a plurality of light sources in the form of chips, having emission spectra that are different from each other. A light-absorbing casting compound in which the chip-type light sources are embedded is applied to the light source receiving element. By embedding said light sources in the light-absorbing casting compound, the emission of light, at least from some of the chip-type light sources, is spatially limited in such a way that the irradiation characteristics of the light sources are adapted to each other.