| 摘要 |
A method of identification and/or security marking which comprises applying to or incorporating into an article one or more triboluminescent phosphors and wherein a similar article to be tested may be subsequently subjected to means for stimulating triboluminescence and wherein emission of triboluminescent radiation serves to identify or confirm the authenticity of the test article. In Figure 1, means 5 stimulates the luminescence eg by styli, blades, wheels, scrapers, rotating brushes, bending, or rotating flails. Sight detector 7, eg photodiode and circuitry 8 provide an indication eg light 9 of authenticity. If the triboluminescent material is applied in bar-code format, then an apparatus like that in Figure 1 may be used to detect it. The identification and/or security may be used on or in bank-notes, cheques, securities, credit/charge cards, passports, identification cards, classified documents, packaging and tickets. <IMAGE> |
