Copy-protected optical media and method of manufacture thereof
First Claim
Patent Images
1. A multi-layer optical medium comprising:
- a substrate having a first major surface and a second major surface, said first major surface having information pits and lands thereon;
a metal reflector layer, said metal reflector layer being disposed along the information pits and lands;
a polymeric film positioned over said metal reflector layer, said polymeric film comprising light-changeable material;
wherein said metal reflector layer has a plurality punctuate discontinuities therein that permit laser light directed through said second major surface to impinge on the light-changeable material polymeric film;
wherein said light-changeable material is a material capable of existing in at least a first optical state and a second optical state, the first optical state being converted in the second optical state upon exposure to an input signal, and the second optical state being spontaneously convertible after a period of time to the first a optical state.
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Abstract
A method for fabricating read-only copy protected optical medium comprising a light-sensitive material at positions capable of altering the data read during copying of the optical medium but permitting read of the underlying data in the reading of the optical medium.
373 Citations
36 Claims
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1. A multi-layer optical medium comprising:
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a substrate having a first major surface and a second major surface, said first major surface having information pits and lands thereon;
a metal reflector layer, said metal reflector layer being disposed along the information pits and lands;
a polymeric film positioned over said metal reflector layer, said polymeric film comprising light-changeable material;
wherein said metal reflector layer has a plurality punctuate discontinuities therein that permit laser light directed through said second major surface to impinge on the light-changeable material polymeric film;
wherein said light-changeable material is a material capable of existing in at least a first optical state and a second optical state, the first optical state being converted in the second optical state upon exposure to an input signal, and the second optical state being spontaneously convertible after a period of time to the first a optical state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for fabricating an optical medium, said method comprising:
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obtaining a substrata having a first major surface and a second major surface, said first major surface having information pits and lands thereon;
metalizing said first major surface so as to form a metalized layer along said information pits and lands;
placing a polymeric layer comprising light-changeable material over said metalized layer;
forming a plurality of holes in said metalized layer;
wherein said light-changeable material is a material capable of existing in at least a first optical state and a second optical state, the first optical state being converted to the second optical state upon exposure to an input signal, and the second optical state being spontaneoulsy convertible after a period of time to the first optical state. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A method for authenticating an optical storage medium having an optical data structure representative of a plurality of hits, the method comprising:
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(a) reading the optical storage medium at a locus to obtain unambiguous standard data code lot the optical storage medium being read that is true to the series of bits represented by the optical data structure at such locus;
(b) re-reading the optical storage medium at the locus to determine it the data code obtained varies by one or more bits in the series of bits represented by the optical data structure at such locus; and
(c) authenticating the optical storage medium it the data obtained in step (b) differs from the data obtained in step (a).
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34. A method fox authenticating an optical storage medium having an optical data structure representative of a codes of bits, the method comprising:
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(a) reading the optical storage medium at a locus to obtain data true to the serves of hits represented by the optical data structure at such locus, said optical data structure at said locus conforming to applicable specifications for the optical storage medium;
(b) re-reading the optical storage medium at the locus to determine if the data obtained varies by one or more bits in the series of bits represented by thc optical data structure at such locus; and
(c) authenticating the optical storage medium if the data obtained in step (b) differs from the data obtained in step (a).
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35. A method for dissuading the illicit copying of data stored on an optical data storage medium stored as a plurality of optical deformations readable by an optical reader as unambiguous data code, said method comprising the steps of:
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introducing one or more physical changes into or on said optical data storage medium at select positions on or within said optical data storage medium;
mapping the positions of said physical changes;
incorporating into the data stored on said optical data storage medium or in said reader, or a device coupled to said reader, a program instruction set for detecting said physical changes in said optical data storage medium at said mapped positions and for effectuating read of said data stored on said optical data storage medium when said physical changes are determined to be present at said select positions on or within said optical data storage medium. - View Dependent Claims (36)
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Specification