FIELD: instrument making.
SUBSTANCE: invention relates to technical means for authenticating bond paper and other secure printed products in different spectral ranges of reflected infrared light. Detector comprises two infrared emitters, a photodetector of reflected infrared radiation, photodetector signal amplifier, an analog-digital converter, a microcontroller, memory, a signalling device and autonomous power supply.
EFFECT: technical result is simplification of design while improving accuracy and reliability of control of products, including rapid inspection, identification, control of authenticity of bond paper and documents.
5 cl, 2 dwg
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