SECURITY FEATURE ON THE BASIS OF LUMINESCENT SUBSTANCES

摘要

The safety feature has two luminescences, where the former luminescence is a spectral wide band and the latter luminescence is a spectral narrow band. The latter luminescence has spectral characteristics which are transmitted through the nature and the composition of one of the two luminescences emitting material. The spectral half-width of a band of the latter luminescence is smaller than the spectral half-width of a band of the former luminescence around the factor. Independent claims are included for the following: (1) a value or safety document with a check digit; (2) a method for the verification of the safety feature; and (3) a device for the verification of the safety feature.