Patent ID: 8749768
Filing Date: 2014-06-10
Classification: A61B,G06K,G07D,Y10T

Abstract:
1. A method for manufacturing a sensor useful for checking value documents, comprising the steps: providing a sensor platform, comprising: a light source receiver on which there are provided a multiplicity of light source positions, each of the light source positions being configured to receive a light source, and a microlens array comprising a multiplicity of microlenses, said microlens array and light source receiver arranged relative to each other such that each of the light source positions is associated with exactly one of the microlenses forming an illumination device by: providing the light source receiver with light sources, each of the light sources being a light emitting diode, so that at several of the light source positions of the light source receiver there is respectively arranged exactly one light emitting diode, and the emission spectra of at least two of the several light sources being mutually different, and arranging the microlens array and the light source receiver provided with the light sources relative to each other such that each of the several light sources has exactly one of the microlenses associated therewith, wherein each of these microlenses collects only emission light of exactly one of the light emitting diodes, arranging the illumination device and the imaging optic such that, upon operating of the sensor, a portion of light emitted by each of the several light sources is imaged by the imaging optic onto the same area of a value document to be checked by the sensor, and arranging the detection device such that the detection device detects detection light which, upon operating of the sensor, emanates from the value document illuminated by the illumination device, wherein each of the light emitting diodes is a chip-shaped light emitting diode, and the emission light of each of the chip-shaped light emitting diodes is collected by the microlens associated with the light emitting diode.