Scanner for scanning items marked with near-infrared tags
First Claim
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1. A scanner for scanning items marked with near-infrared tags, the scanner comprising:
- a laser configured to produce a narrowband near-infrared beam matched to a peak wavelength of near-infrared ink used to print the tags;
a mirror assembly to re-direct the beam;
a deflecting arrangement to receive the re-directed beam, the deflecting arrangement including a horizontal deflector, a vertical deflector and a pair of synchronised drivers to drive the deflectors;
a steering mirror to steer the deflected beam;
a scanning mirror to direct the beam onto the tag to be scanned; and
a light collection system to collect light reflected by the tags.
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Abstract
A scanner for scanning items marked with near-infrared tags includes a laser configured to produce a narrowband near-infrared beam matched to a peak wavelength of near-infrared ink used to print the tags. A mirror assembly re-directs the beam. A deflecting arrangement receives the re-directed beam. A steering mirror steers the deflected beam. A scanning mirror directs the beam onto the tag to be scanned and a light collection system collects light reflected by the tags.
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Citations
7 Claims
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1. A scanner for scanning items marked with near-infrared tags, the scanner comprising:
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a laser configured to produce a narrowband near-infrared beam matched to a peak wavelength of near-infrared ink used to print the tags; a mirror assembly to re-direct the beam; a deflecting arrangement to receive the re-directed beam, the deflecting arrangement including a horizontal deflector, a vertical deflector and a pair of synchronised drivers to drive the deflectors; a steering mirror to steer the deflected beam; a scanning mirror to direct the beam onto the tag to be scanned; and a light collection system to collect light reflected by the tags. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification