Sensor for verifying the luminescence of value documents

A method for providing a velocity correction of at least one luminescence parameter of a value document to be verified in a sensor, which is configured to measure at least one luminescence intensity of the value document while the respective value document is transported past the sensor, and which is configured to determine at least one luminescence parameter of the respective value document on the basis of the measured at least one luminescence intensity and to verify the luminescence of the respective value document, having the following steps:

• a) determining a first velocity dependence of the luminescence parameter of a reference medium excitable to luminescence emission, which corresponds to the luminescence parameter of the value document, with the aid of a reference sensor assigned to the sensor for a first transport direction of the reference medium relative to the reference sensor, and
• b) determining a second velocity dependence of the luminescence parameter of the reference medium, which corresponds to the luminescence parameter of the value document, with the aid of the reference sensor for a second transport direction of the reference medium, opposite to the first transport direction, relative to the reference sensor, and
• c) averaging the first velocity dependence of the luminescence parameter of the reference medium and the second velocity dependence of the luminescence parameter of the reference medium at the respective velocity in order to ascertain a mean velocity dependence of the luminescence parameter of the reference medium, and
• d) using the mean velocity dependence of the luminescence parameter of the reference medium to determine a velocity dependence of a correction factor, which is suitable for correcting the luminescence parameter of the value document to be verified,
• e) storing the velocity dependence of the correction factor in the sensor,
• f) providing a velocity correction, which is usable in the verification of the luminescence of the value document transported at a verification transport velocity past the sensor to correct the luminescence parameter determined using the sensor for the value document, in a correction unit of the sensor, wherein the correction unit for the velocity correction of the luminescence parameter of the value document is configured,
• on the basis of a velocity dependence of the correction factor stored in the sensor and by means of information made available to the sensor about the verification transport velocity of the value document, to determine a correction factor, which applies for the verification transport velocity of the value document, and
• to correct the luminescence parameter determined by the sensor for the value document with the aid of the correction factor applicable for the verification transport velocity of the value document, in order to determine a corrected luminescence parameter for the value document,
• wherein the sensor is configured to use the corrected luminescence parameter to verify the luminescence of the value document.