SPECTRAL SENSOR FOR CHECKING VALUABLE DOCUMENTS Russian patent published in 2015 - IPC G07D7/12 

FIELD: measurement equipment.

SUBSTANCE: invention relates to spectral sensors for checking valuable documents with projection optics and a detector. An illumination device has a variety of light sources that differ from each other with their emission spectra and are connected in series one after another and light pulses comprising a sequence with emission spectra differing from each other. For each of the light pulses there recorded is the measured value of distribution of intensity of the detected light. A variety of light sources covers the range of near-infrared region of the spectrum and/or the range of the visible range of spectrum so that the spectral sensor is capable of recording spectral distribution of intensity in the specified range of the near-infrared region of the spectrum and/or in the specified range of the visible range of spectrum.

EFFECT: recording of spectral distribution of intensity of light reflected from one or more sections of a valuable document in a visually perceived near-infrared region of the spectrum.

15 cl, 8 dwg