GONIOLUMINISCENT PROTECTIVE ELEMENT AND METHOD OF ITS PRODUCTION Russian patent published in 2013 - IPC B42D15/10 G07D7/12 B32B7/00 

FIELD: process engineering.

SUBSTANCE: invention relates to gonioluminiscent material. Protective element comprises first element and second element covering at least partially said first element. Second element faces the of protective element observation side. First element comprises first luminescent means while second element comprises optical interference structure with transmissivity and/or reflectivity dependent upon orientation in isolated wavelength band. Said first and second elements are matched so that observed luminescent light changes at excitation of luminescence of the first luminescent means depending upon observation orientation and/or excitation light incidence direction. In said wavelength band at straightly one orientation or in limited orientation range at least one interference structure varies its transmissivity or reflectivity. Note here that isolated spectral band matches with wavelength band wherein first luminescent means can be excited by irradiation by excitation light.

EFFECT: protective element with high degree of protection against counterfeit.

22 cl, 10 dwg