Embedded information carrier for optical data
OwnerRonald R. Erickson, Joel N. Bock +1inventors
InventorsRonald R. Erickson, Joel N. Bock, Eliezer D. Sandler
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Abstract
In a system for authenticating information, a holographic element, including a first layer of optical information in a first coded pattern and a second layer of optical information in a second coded pattern is inserted into a reader. The reader includes an opening into which the holographic element may be positioned, a light source, a first detector positioned at a first predetermined distance from the location of the holographic element when the holographic element is positioned in the opening, and a second detector positioned at a second predetermined distance from the location of the holographic element when the holographic element is positioned in the opening.
Claims6
A device for limiting the reproducibility of information, comprising:
- a semi-rigid carrier;
- and
- a holographic element coupled to the semi-rigid carrier, including a first layer of optical information in a first coded pattern and a second layer of optical information in a second coded pattern.
A system for authentication of information, comprising:
- a holographic element, including a first layer of optical information in a first coded pattern and a second layer of optical information in a second coded pattern;
- and
- a reader, including
- an opening for positioning of the holographic element,
- a light source,
- a first detector positioned at a first predetermined distance from the location of the holographic element when the holographic element is positioned in the opening, and
- a second detector positioned at a second predetermined distance from the location of the holographic element when the holographic element is positioned in the opening.
Dependencies are inferred from the claim text.