Data reader and reader system having visible centerless targeting
AssigneeEastman Kodak Company
InventorsDavid J. Nelson, Robert C. Bryant, Carl F. Leidig
Life of this patent
Estimating the term…
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.
Claims32
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.
A data-reading system comprising:
- 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.
A data-reading system comprising:
- 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.
A data-reading system comprising:
- 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.
Dependencies are inferred from the claim text.