FIELD: physics; images processing.
SUBSTANCE: invention is related to methods for counterfeit protection and assessment of identity of valuable articles, and also expensive medicines, intellectual property objects, securities. Protective facility material is metal with electrochemically treated surface to create rough surface of nanosize level, at that detected informative criteria are simultaneously specific generations of giant reflected second and third harmonics, for excitation of which laser coherent radiation is used in short-range infrared and visible optical range of wave lengths as probing electromagnet radiation.
EFFECT: provision of guaranteed protection and possibility to assess identity with the help of simple technical means.
2 cl, 2 dwg
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|---|---|---|---|
| METHOD FOR COUNTERFEIT PROTECTION AND CONTROL OF VALUABLE ARTICLES IDENTITY | 2007 |
|
RU2343550C1 |
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RU2343546C2 |
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RU2359328C2 |
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|
RU2356093C1 |
