Determining the authenticity of an object
Assigneeams International AG
InventorDewight Warren
Life of this patent
Estimating the term…
Abstract
A device comprising: an optical emitter for emitting light having an emitted optical spectrum; an optical sensor for receiving light reflected from a tag attached to an object; and a processor configured to: determine a reflected optical colour spectrum of the light reflected from the tag based on an output of the optical sensor; retrieve an optical signature associated with said object from memory; and determine the authenticity of said object based on comparing the optical signature and the reflected optical colour spectrum.
Claims21
A device comprising:
- an optical emitter for emitting light having an emitted optical spectrum;
- an optical sensor for receiving light reflected from a tag attached to an object;
- and
- a processor configured to:
- determine a reflected optical colour spectrum of the light reflected from the tag based on an output of the optical sensor;
- retrieve an optical signature associated with said object from memory;
- and
- determine the authenticity of said object based on comparing the optical signature and the reflected optical colour spectrum,
- wherein the reflected optical colour spectrum comprises, for each of a plurality of wavelength bands, a ratio of optical power of the light reflected from the tag to optical power of the light emitted by the optical emitter.
(canceled)
A computer implemented method for authenticating an object, the method performed on a device and comprising:
- controlling an optical emitter of said device to emit light having an emitted optical spectrum;
- determining a reflected optical colour spectrum of light reflected from a tag attached to the object based on an output of an optical sensor of said device;
- retrieving an optical signature associated with said object from memory;
- and
- determining the authenticity of said object based on comparing the optical signature and the reflected optical colour spectrum,
- wherein the reflected optical colour spectrum comprises, for each of a plurality of wavelength bands, a ratio of optical power of the light reflected from the tag to optical power of the light emitted by the optical emitter.
A system comprising:
- a device comprising an optical emitter for emitting light having an emitted optical spectrum;
- and
- a tag attached to an object, the tag comprising:
- a base layer of optically absorptive material;
- and
- at least one optical filter, each of the least one optical filter configured to pass light having a wavelength in one or more portions of the emitted optical spectrum through to the base layer and reflect light having a wavelength in remaining portions of the emitted optical spectrum;
- wherein the device further comprises:
- an optical sensor for receiving light reflected from the tag;
- and
- a processor configured to:
- determine a reflected optical colour spectrum of the light reflected from the tag based on an output of the optical sensor;
- retrieve an optical signature associated with said object from memory;
- and
- determine the authenticity of said object based on comparing the optical signature and the reflected optical colour spectrum,
- wherein the reflected optical colour spectrum comprises, for each of a plurality of wavelength bands, a ratio of optical power of the light reflected from the tag to optical power of the light emitted by the optical emitter.
Dependencies are inferred from the claim text.