Characterizing items of currency
AssigneeMEI, Inc.
InventorsFatiha Anouar, Gaston Baudat, Philippe S. Jard
Life of this patent
Estimating the term…
Abstract
Characterizing an item of currency employs a validation apparatus that includes at least three specified light sources for illuminating the item of currency. Each of the specified light sources has an emission spectrum similar to an approximating function for reconstructing a predetermined set of spectrum. At least one receiver receives light emitting from the at least three specified light sources. A transportation unit transports the item of currency within the validation apparatus. The light received by the receiver is at least one of light reflected by or light transmitted through the item of currency.
Claims28
A validation apparatus comprising:
- at least one broadband source for illuminating an item of currency;
- at least three specified physical filters, wherein each of the at least three specified physical filters has a transmission spectrum similar to at least one approximating function for reconstructing a predetermined reference spectrum, the reference spectrum being similar to an emission spectrum of at least a portion of a document, wherein each of the at least three specified filters filter light emitted from each respective broadband source such that the resulting transmission spectrum is similar to the predetermined reference spectrum;
- at least one receiver for receiving filtered light emitted from the at least one broadband source;
- a transportation unit for transporting the item of currency within the validation apparatus;
- wherein the at least three specified physical filters are positioned between the at least one broadband source and the at least one receiver;
- and
- wherein the light received by the at least one receiver is at least one of light reflected by or light transmitted through the item of currency.
A validation apparatus comprising:
- a plurality of common sources for illuminating an item of currency, wherein at least one common source has an emission spectrum similar to at least one of Red light, Blue light, Green light or infrared light;
- at least one specified source for illuminating the item of currency, wherein the emission spectrum of the at least one specified source is similar to a portion of an emission spectrum of at least an item of currency to be classified by the validation apparatus;
- a receiver for receiving light emitted from at least one of the plurality of common sources or the at least one specified source;
- a transportation unit for transporting the item of currency within the validation apparatus;
- wherein the validation apparatus classifies the currency item based in part on at least one of light reflected on or transmitted through the currency item.
A validation apparatus comprising:
- a plurality of common sources for illuminating an item of currency, wherein at least one common source has an emission spectrum similar to at least one of Red light, Blue light, Green light or infrared light;
- at least one specified source for illuminating the item of currency, wherein the emission spectrum of the at least one specified source is similar at least one approximating function for reconstructing a predetermined reference spectrum;
- a receiver for receiving light emitted from at least one of the plurality of common sources or the at least one specified source;
- and
- a transportation unit for transporting the item of currency within the validation apparatus;
- wherein the validation apparatus classifies the currency item based in part on at least one of light reflected on or transmitted through the currency item.
Dependencies are inferred from the claim text.