Security markers for determining composition of a medium
AssigneePrime Technology LLC
InventorsGary A. Ross, Graham I. Johnson, Barrie Clark, Simon J. Forrest, Jeffrey Cegalis, William J. Greaves, Charles Q. Maney
Life of this patent
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Abstract
A method of determining a component of a medium comprises illuminating the medium to excite a marker associated with the component. Detected photoluminescent emission from the marker in response to the excitation is compared with one or more emission profiles. The component is identified based on a match between the detected photoluminescent emission and at least one of the emission profiles.
Claims16
A method of determining a component of a medium, the method comprising:
- illuminating the medium to excite a marker associated with the component;
- detecting photoluminescent emission from the marker in response to the excitation;
- comparing the detected photoluminescent emission with one or more emission profiles associated with the marker;
- identifying the component based on a match between the detected photoluminescent emission and at least one of the one or more emission profiles.
- illuminating the medium to excite a marker associated with a second component of the medium;
- detecting a second photoluminescent emission from the marker associated with the second component in response to the excitation;
- comparing the detected second photoluminescent emission with one or more emission profiles associated with the second marker;
- and
- identifying the second component based on a match between the detected second photoluminescent emission and at least one of the one or more emission profiles associated with the second marker.
A method of analyzing a medium comprising a plurality of components to determine a concentration of at least one of the components, the method comprising:
- illuminating the medium to excite one or more photoluminescent markers associated with each component of the medium;
- detecting photoluminescent emission from the one or more photoluminescent markers associated with each component in response to the excitation;
- generating a composite photoluminescent signature from the detected photoluminescent emission;
- processing the composite photoluminescent signature to ascertain the contribution to the composite photoluminescent signature from a component;
- and
- calculating the concentration of the component based on the processed composite photoluminescent signature and the ascertained contribution.
A system for determining a concentration of a component of a medium, the system comprising:
- a light source which illuminates the medium and excites one or more photoluminescent markers associated with each component of the medium;
- a detector which detects photoluminescent emission from the one or more photoluminescent markers in response to the excitation;
- a processor which generates a composite photoluminescent signature from the detected photoluminescent emission, processes the composite photoluminescent signature to ascertain a contribution from a component, and calculates the concentration of the component based on the processed composite photoluminescent signature and the ascertained contribution.
Dependencies are inferred from the claim text.