Data reader and reader system having visible centerless targeting
First Claim
Patent Images
1. A data reader comprising:
- a digital image detector;
an optical system imaging on said digital image detector;
a light emitter emitting a light beam;
a pattern maker receiving said beam from said light emitter and transmitting a zero order beam and a second beam; and
a mask receiving said beams from said pattern maker, said mask having a shield obstructing said zero order beam and a window passing said second beam.
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Abstract
A data reader has a digital image detector an optical system imaging on the digital image detector, and a marker beam source that emits a diverging, centerless visible light projection. A data reading system includes the data reader and media bearing: a visible primary image and a secondary image overlying the visible image. The secondary image is transparent to visible radiation and modulates a band of invisible electromagnetic radiation. The media also bears visible indicia aligned with the secondary image.
146 Citations
32 Claims
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1. A data reader comprising:
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a digital image detector;
an optical system imaging on said digital image detector;
a light emitter emitting a light beam;
a pattern maker receiving said beam from said light emitter and transmitting a zero order beam and a second beam; and
a mask receiving said beams from said pattern maker, said mask having a shield obstructing said zero order beam and a window passing said second beam. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A data-reading system comprising:
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media bearing;
a visible primary image, a secondary image overlying said primary image, said secondary image being transparent to visible radiation, said secondary image modulating a band of invisible electromagnetic radiation to provide an invisible radiation image, and a visible fiducial delimiting said secondary image; and
a data reader including;
a digital image detector sensitive to said invisible radiation image;
an optical system imaging on said digital image detector; and
a marker projection source emitting a visible light projection having a geometric shape matching said fiducial. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A data-reading system comprising:
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media bearing;
a visible primary image, a plurality of secondary images overlying said primary image, each said secondary image being transparent to visible radiation, each said secondary image differently modulating a band of invisible electromagnetic radiation to provide a respective invisible radiation image, and a plurality of visible fiducials, each said fiducial delimiting a respective said secondary image; and
a data reader including;
a digital image detector sensitive to said invisible radiation image;
an optical system imaging on said digital image detector; and
a marker projection source emitting a visible light projection having a geometric shape matching each of said fiducials.
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30. A data-reading system comprising:
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first and second sets of photographic prints, said prints of said first set being of a first size;
said prints of said second set being of a second size different than said first size, each print of said first and second sets bearing;
a visible primary image, one or more secondary images overlying said primary image, each said secondary image being transparent to visible radiation, each said secondary image differently modulating a band of invisible electromagnetic radiation to provide a respective invisible radiation image, and a plurality of visible fiducials, each said fiducial delimiting a respective one of said secondary images;
each of said secondary images on said sets of photographic prints being of the same size; and a data reader including;
a digital image detector sensitive to said invisible radiation image;
an optical system imaging on said digital image detector; and
a marker projection source emitting a visible light projection having a geometric shape matching each of said fiducials. - View Dependent Claims (31, 32)
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Specification