Method, device and security system, all for authenticating a marking
First Claim
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1. A method for authenticating a luminescent probe marking, said method comprising steps of:
- exciting said luminescent probe marking with at least one excitation pulse of at least one excitation source,measuring probe intensity values of emission radiation of said luminescent probe marking in response to said at least one excitation pulse at time intervals,forming a probe intensity-versus-time emission function of said probe intensity values,normalizing said probe intensity-versus-time emission function, and thencomparing said probe intensity-versus-time emission function with at least one reference intensity-versus-time emission function.
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Abstract
A luminescent probe marking is excited with at least one excitation pulse of at least one excitation source. The probe intensity values of emission intensity from emission radiation of the luminescent probe marking are measured in response to the excitation pulse(s) at time intervals. A probe intensity-versus-time emission function is formed of the probe intensity values, and the probe intensity-versus-time emission function is compared with at least one reference intensity-versus-time emission function after the probe intensity-versus-time emission function and the reference intensity-versus-time emission function have been normalized.
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Citations
17 Claims
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1. A method for authenticating a luminescent probe marking, said method comprising steps of:
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exciting said luminescent probe marking with at least one excitation pulse of at least one excitation source, measuring probe intensity values of emission radiation of said luminescent probe marking in response to said at least one excitation pulse at time intervals, forming a probe intensity-versus-time emission function of said probe intensity values, normalizing said probe intensity-versus-time emission function, and then comparing said probe intensity-versus-time emission function with at least one reference intensity-versus-time emission function. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A device for authenticating a luminescent probe marking, said device comprising:
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at least one detector for measuring probe intensity values of emission intensity from emission radiation of said luminescent probe marking in response to at least one excitation pulse generated by at least one excitation source at time intervals, at least one processor for forming a probe intensity-versus-time emission function of said probe intensity values, at least one processor for comparing said probe intensity-versus-time emission function with at least one reference intensity-versus-time emission function and at least one processor for normalizing said probe intensity-versus-time emission function prior to comparison with a normalized reference probe intensity-versus-time emission function. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification