Machine-readable optical disc with reading-inhibit agent
First Claim
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1. In an optical disc comprising machine-readable, information-encoding features, the improvement comprising:
- a barrier layer releasably coupled to the disc, said barrier layer configured to prevent machine-reading of the features; and
a reading-inhibit agent, included in the disc and activated by removal of the barrier layer, said reading-inhibit agent operative, once activated, to alter the disc to inhibit reading of the disc.
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Abstract
An optical disc having machine-readable, information-encoding features is provided with a barrier layer secured to the disc. This barrier layer is configured to prevent machine-reading of the features. A reading-inhibit agent, included in the disc and activated by removal of the barrier layer, is operative, once activated, to alter the disc to inhibit reading of the disc. Alternately, the barrier layer can be eliminated, and the reading-inhibit agent can be activated by initial reading of the disc, as for example by exposure to optical radiation associated with reading of the disc, or rotation of the disc.
162 Citations
14 Claims
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1. In an optical disc comprising machine-readable, information-encoding features, the improvement comprising:
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a barrier layer releasably coupled to the disc, said barrier layer configured to prevent machine-reading of the features; and
a reading-inhibit agent, included in the disc and activated by removal of the barrier layer, said reading-inhibit agent operative, once activated, to alter the disc to inhibit reading of the disc. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. In an optical disc comprising machine-readable, information-encoding features, a method for rendering at least some of the features unreadable by machine, comprising:
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providing the disc to include a reading-inhibit agent and a barrier layer that is releasably coupled to the disc. the barrier layer configured to prevent machine-reading of the features;
removing the barrier layer; and
in response to the removal of the barrier layer, activating the reading-inhibit agent to begin a process that results in at least some of the features being made unreadable by machine. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification