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 received by the composition through the optical filter. The filter attenuates the intensity of the received excitation radiation and the light radiation emitted by the composition. Independent claims are also included for the following: (1) a method for calibrating a sepctrofluorimetry apparatus (2) a method for controlling a secured document. L'invention concerne un dispositif étalon comprenant un support (1), le support (1) possédant une cavité (22), une composition (5) disposée dans la cavité (22), la composition (5) contenant un pigment apte émettre un rayonnement luminescent en réponse à un rayonnement d'excitation, et un filtre optique (3), agencé de sorte que le rayonnement d'excitation est reçu par la composition (5) à travers le filtre optique (3), dans lequel le filtre optique (3) est apte à atténuer l'intensité du rayonnement d'excitation reçu et/ou du rayonnement luminescent émis par la composition (5).