Bis-propyl amine analog and composition
First Claim
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1. A method for fabricating an optical medium readable by an optical reader, said method comprising the steps of:
- (a) molding a substrate so as to have a first major surface with information pits and information lands thereon and a second major surface that is relatively planar;
(b) applying a transient optical state change security material capable of converting from a first optical state to a second optical state upon exposure to the laser of said optical reader to at least a position of said first major surface;
(c) applying a reflective material over the first major surface so as to cover said information pits and information lands;
wherein the transient optical state change security material comprises [7-(dipropylamino)phenothiazin-3-ylidene]dipropylamine.
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Abstract
Copy-protected optical medium utilizing a composition comprising a transient optical state change security materials capable of changing optical state when exposed to a wavelength of about 630 nm to about 660 nm and an electron transfer agent.
52 Citations
24 Claims
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1. A method for fabricating an optical medium readable by an optical reader, said method comprising the steps of:
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(a) molding a substrate so as to have a first major surface with information pits and information lands thereon and a second major surface that is relatively planar;
(b) applying a transient optical state change security material capable of converting from a first optical state to a second optical state upon exposure to the laser of said optical reader to at least a position of said first major surface;
(c) applying a reflective material over the first major surface so as to cover said information pits and information lands;
wherein the transient optical state change security material comprises [7-(dipropylamino)phenothiazin-3-ylidene]dipropylamine.
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2. [7-(dipropylamino)phenothiazin-3-ylidene]dipropylamine.
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3. A compound of the formula:
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4. A composition comprising:
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a transient optical state change security material capable of existing in a first unactivated state and a second activated state on said first or second major surface, said transient optical state security material comprising a compound of formula I;
where R6, R7, R8, and R9 are alkylamino and R1, R2, R3, R4 and R5 are selected from the group consisting of hydrogen, alkyl, aryl, alkoxy, thioalkoxy, alkylamino, nitro, amino and halogen; and
X is selected from the group consisting of Cl, Br, I, Chlorate, Mesylate, Tosylate, triflate, ethoxylate, methoxylate and any other anion, andan electron transfer agent. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13)
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- 14. An optical medium comprising the compound [7-(dipropylamino)phenothiazin-3-ylidene]dipropyl-amine wherein the compound when applied to the optical medium it is detectable on said optical medium by an optical reader producing a wavelength of from about 630 nm to about 660 nm by a transient change in optical state from an initial optical state to a second optical state.
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16. A method for authenticating an optical medium having a number of data deformations thereon, said method comprising the steps of:
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(1) providing for a complementary data state onto a portion of said optical medium;
(2) detecting said complementary data state on said portion of said optical medium. (3) authenticating said optical medium upon detection of said complementary data state on said portion of said optical medium;
wherein the complementary data state is produced using a transient optical state security material comprising [7-(dipropylamino)phenothiazin-3-ylidene]dipropyl-amine. - View Dependent Claims (17, 18, 19, 20)
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21. An optical disc comprising a compound of formula:
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22. An optical disc comprising a composition having:
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an electron transfer agent; and
a dye capable of being reduced by said electron transfer agent and activated by a wavelength of between about 630 nm to about 660 nm to convert from one optical state to a second optical state. - View Dependent Claims (23, 24)
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Specification