G - Physics – 07 – D
Patent
G - Physics
07
D
G07D 7/12 (2006.01)
Patent
CA 2555878
This invention relates to a method and the relevant device used to implement such a method, for the identification of documents and banknotes marked with OVI TM (Optical Variable Inks). The above-mentioned device is apt to: .cndot. generate a white light ray (full spectrum) between 5,000° and 7,000°K, with a light intensity of at least 30,000 mcd; .cndot. polarize that white light ray through a first polarizing filter (3), and send the polarized ray (4) onto an area (5) to be assessed; .cndot. filter the ray (6) reflected by the area (5) to be assessed by means of a second polarizing filter (7), in phase consistency with the first polarizing filter (3) and getting a first signal (s a) by measuring its luminous intensity; .cndot. filter the ray (6) reflected by the area (5) to be assessed by means of a third polarizing filter (8), in anti-phase with the first polarizing filter (3), and getting a second signal (s b) by measuring its luminous intensity; .cndot. measure the difference .DELTA. between these two signals; .cndot. compare the calculated value .DELTA. to a reference value .DELTA.r previously measured on genuine documents and banknotes, providing a signal depending on the genuineness or not of the assessed document or banknote.
Numerouno Ricerche S.r.l.
Robic
LandOfFree
Method and device for the detection of counterfeit documents... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and device for the detection of counterfeit documents..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and device for the detection of counterfeit documents... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1620019