Disc structure for bit-wise holographic storage
View Patent ↗An optical disc for micro-holographic data storage, including: optically-enabled material configured to store holographic data; guide grooves; a first coating disposed on the guide grooves and configured to reflect a tracking beam and to transmit a read or record beam; and a second coating disposed to cover the guide grooves and disposed on the first coating.
1. An optical disc for micro-holographic data storage, comprising:
optically-enabled material configured to store holographic data, wherein the optically-enabled material comprises guide grooves;
a first coating disposed on the guide grooves and configured to reflect a tracking beam and to transmit a read or record beam; and
a second coating disposed to cover the guide grooves and disposed on the first coating.
2. The disc of claim 1 , wherein the optical disc is largely monolithic.
3. The disc of claim 1 , wherein the optically-enabled material comprises data layers comprising micro-holograms.
4. The disc of claim 1 , wherein the optically-enabled material comprises a thermoplastic.
5. The disc of claim 1 , wherein the optically-enable material comprises a threshold material that is optically-enabled.
6. The disc of claim 5 , wherein the threshold material comprises a phase change material, an energy transfer material, or a thermo-chromic material, or any combination thereof.
7. The disc of claim 1 , wherein the guide grooves are molded as part of the optically-enabled material.
8. The disc of claim 1 , wherein the guide grooves comprise spiral tracks, wobble structures, or synchronization marks, or any combination thereof.
9. The disc of claim 1 , wherein the first coating comprises a dichroic coating.
10. The disc of claim 1 , wherein the second coating is substantially planarized.
11. The disc of claim 1 , wherein the second coating comprises an acrylate.
12. The disc of claim 1 , wherein the second coating reduces disturbance by the grooves to a record/read beam.
13. The disc of claim 1 , wherein the second coating provides a protective layer for the disc.
14. A method of manufacturing a holographic data storage disc, comprising:
molding a holographic-enabled material in a disc shape with guide grooves;
applying a first coating to the guide grooves, wherein the first coating is configured to reflect a tracking beam and to transmit a read or record beam; and
applying a second coating to cover the guide grooves, wherein the second coating is disposed on the first coating.
15. The method of claim 14 , wherein molding comprises injection-molding.
16. The method of claim 14 , wherein applying the first coating comprises depositing, evaporating, or sputtering a dichroic coating on the guide grooves, or any combination thereof.
17. The method of claim 14 , wherein applying the second coating comprises spin coating.
18. A multi-layer optical disc for micro-holographic data storage, comprising:
at least one layer of optically-enabled material arranged between a substrate layer and a cover layer, wherein at least one layer of optically-enabled material comprises guide grooves on one side;
a coating disposed on the guide grooves and configured to reflect a tracking beam and to transmit a read or record beam.
19. The disc of claim 18 , comprising at least two layers of optically-enabled material, wherein an intermediate layer is disposed between two layers of optically-enabled material.
20. The disc of claim 18 , wherein the guide grooves are disposed directly adjacent the substrate layer.
21. The disc of claim 18 , wherein the guide grooves are disposed directly adjacent the cover layer.
22. The disc of claim 18 , wherein the guide grooves are disposed between two layers of optically-enabled material.
23. The disc of claim 18 , wherein the at least one layer of optically- enabled material comprises a thickness in the range of about 0.1 millimeter (mm) to about 1.2 mm.