Sepctrofluorimetry apparatus calibrating device for controlling luminescence level of security mark in e.g. bank note, has composition with pigment emitting light radiation in response to excitation radiation and disposed in cavity
The device has a composition (5) containing a pigment emitting light radiation in response to ultraviolet excitation radiation and disposed in a cavity (22) of a support (1), where the composition presents high thickness. An optical filter (3) is arranged such that the excitation radiation is receiv...
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Main Authors | , |
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Format | Patent |
Language | English French |
Published |
12.10.2007
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Subjects | |
Online Access | Get full text |
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