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

• Main Authors: JACQUET PHILIPPE, THIEBAUT JEAN MARIE
• Format: Patent
• Language: English; French
• Published: 12.10.2007
• Subjects: CHECKING-DEVICES; HANDLING OF COINS OR OF PAPER CURRENCY OR SIMILAR VALUABLEPAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING,DISPENSING, CHANGING OR DEPOSITING; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

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...