FIELD: physics, signalling.
SUBSTANCE: invention relates to means of protecting valuable documents. Described is a system of luminescent security features, a luminescent security feature, as well as a device and a method of verifying the said luminescent security feature. The system of valuable documents includes luminescent materials which have an invisible but machine-readable spectral code formed by at least two of the said materials with overlapping spectral bands as a response. Each material is a powdered pigment and contains a matrix with an embedded luminophor.
EFFECT: increased security level.
55 cl, 6 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| IMPORTANT DOCUMENT | 2004 |
|
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