METHOD AND DEVICE FOR MEASURING OPTICAL PROPERTIES OF AN OPTICALLY VARIABLE MARKING APPLIED TO AN OBJECT
A method for measuring optical properties of an optically variable marking applied on an object, the method including the steps of illuminating the optically variable marking so as to form a first light reflected by the marking at a first view angle and a second light reflected by the marking at a s...
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| creator | DECOUX, ERIC SCHWAB, XAVIER |
| description | A method for measuring optical properties of an optically variable marking applied on an object, the method including the steps of illuminating the optically variable marking so as to form a first light reflected by the marking at a first view angle and a second light reflected by the marking at a second view angle, the first and second lights having different spectral compositions as a result of the optically variable marking, refracting the second reflected light through a optical unit so as to redirect the second reflected light toward an optical sensor, capturing the first light and the second refracted light with the optical sensor simultaneously; and determining optical properties of the optical variable marking based on the captured first and second lights. |
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| language | eng ; fre ; ger |
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| subjects | CALCULATING CHECKING-DEVICES COMPUTING COUNTING HANDLING OF COINS OR OF PAPER CURRENCY OR SIMILAR VALUABLEPAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING,DISPENSING, CHANGING OR DEPOSITING HANDLING RECORD CARRIERS PHYSICS PRESENTATION OF DATA RECOGNITION OF DATA RECORD CARRIERS |
| title | METHOD AND DEVICE FOR MEASURING OPTICAL PROPERTIES OF AN OPTICALLY VARIABLE MARKING APPLIED TO AN OBJECT |
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