Claims
- 1. A method for manufacturing a holographic storage medium comprising:
providing one or more data masks with data to be recorded on a holographic storage medium; illuminating the one or more data masks onto the holographic storage medium with a plane wave object beam from a laser light source operating at a record wavelength; propagating a reference beam at an incident angle to the holographic storage medium to record the one or more data masks on the holographic storage medium; altering the incident angle of the reference beam for each of the one or more data masks, wherein each of the one or more data masks recorded on said holographic storage medium can be read bit by bit using a laser light source operating in a readout range of wavelengths different from the record wavelength.
- 2. The method of claim 1, wherein the reference beam and object beam are counterpropagating.
- 3. The method of claim 1, wherein the record wavelength is less than the readout range of wavelengths.
- 4. The method of claim 1, wherein the record wavelength is approximately 532 nanometers.
- 5. The method of claim 1, wherein the readout range of wavelengths is approximately 630 to 800 nanometers.
- 6. The method of claim 1, wherein the readout range of wavelengths is approximately 630 to 690 nanometers.
- 7. The method of claim 1, wherein the readout range of wavelengths is approximately 760 to 800 nanometers.
- 8. A method for manufacturing a holographic storage medium comprising:
providing one or more data masks with data to be recorded on a holographic storage medium; propagating a plane wave object beam and reference beam from a laser light source operating at a first range of record wavelengths; illuminating the one or more data masks onto the holographic storage medium with the object beam; propagating the reference beam at fixed incident angle to the holographic storage media to record the one or more data masks on the holographic storage media; altering the record wavelength of the object beam and reference beam for each of the one or more data masks, wherein each of the one or more data masks recorded on said holographic storage medium can be read bit by bit using a laser light source operating in a readout range of angles different from the first range of record angles.
- 9. The method of claim 8, wherein the reference beam and object beam are counterpropagating.
- 10. The method of claim 8, wherein the first range of record wavelengths is less than the readout wavelength.
- 11. The method of claim 8, wherein the readout wavelength is between approximately 630 and 800 nanometers.
- 12. The method of claim 8, wherein the readout wavelength is between approximately 630 and 690 nanometers.
- 13. The method of claim 8, wherein the readout wavelength is between approximately 760 and 800 nanometers.
- 14. A method for reading an optical storage medium comprising:
propagating a readout beam from a laser light source to an optical storage medium; identifying an optical storage medium type of the optical storage medium as a holographic storage device or other type of optical storage medium; propagating the readout beam from the optical storage medium to a lens with an adjustable focal length; adjusting the focal length of the lens depending on the optical storage medium type; and focussing the readout beam onto the detector with the lens.
- 15. The method of claim 14, further comprising propagating the readout beam through an objective lens to focus the readout beam on the optical storage medium.
- 16. The method of claim 14, wherein the adjustable focal length is controlled by an applied voltage to the lens.
- 17. The method of claim 16, wherein an applied voltage magnitude is associated with the storage media type.
- 18. The method of claim 14, wherein the adjustable focal length is adjusted by an amount greater than 10% depending on the optical storage medium type.
- 19. A system for reading an optical storage medium comprising:
a laser light source capable of operating at a range of wavelengths for providing a readout beam; an objective lens for focussing the readout beam onto an optical storage medium; a means for identifying an optical storage medium type of the optical storage medium as a holographic storage device or other type of optical storage medium; a detector; a lens with an adjustable focal length for focussing the readout beam onto the detector, wherein a focal length controller adjust the focal length of the lens depending on the optical storage medium type.
- 20. The system of claim 19, wherein the laser light source comprises a wavelength tunable diode, wherein the wavelength is temperature controlled.
- 21. The system of claim 19, further comprising a controller means for synchronizing the focal length controller and the means for identifying whether the optical storage medium type is a holographic storage device or other type of optical storage medium.
- 22. The system of claim 19, wherein the range of wavelengths is between 630 to 690 nanometers.
- 23. The system of claim 19, wherein the focal length controller applies a voltage to the lens to adjust the focal length of the lens.
- 24. A system for manufacturing a holographic storage medium comprising:
a laser light source capable of operating at a record wavelength for providing an object beam and a reference beam; one or more data masks, wherein the one or more data masks are illuminated by the object beam; a holographic storage medium for recording the one or more data masks, wherein the holographic storage medium is illuminated by the object beam propagating through the one or more data masks; a means for altering an incident angle of the reference beam directed at the holographic storage medium, wherein each of one or more data masks recorded on said holographic storage device can be read bit by bit using a laser light source operating in a readout range of wavelengths different from the record wavelength.
- 25. The system of claim 24, wherein the record wavelength is less than the range of readout wavelengths.
- 26. The system of claim 24, wherein the readout range of wavelengths is between 630 and 800 nanometers.
- 27. The system of claim 24, wherein the record wavelength is 532 approximately nanometers.
- 28. The system of claim 24, wherein the object beam and reference beam are counterpropagating.
- 29. The system of claim 24, wherein the holographic storage device comprises a layer of photopolymer material.
- 30. The system of claim 24, wherein the one or more data masks are transmissive amplitude or transmissive phase masks.
- 31. The system of claim 24, wherein the data mask contains a holographic storage device identifier.
- 32. A method for manufacturing a storage medium comprising:
disposing a holographic storage layer on the storage medium, wherein the storage medium includes an optical storage layer for storing information; and storing data in the holographic layer.
- 33. The method of claim 32, wherein the optical storage layer includes at least one of CD and DVD storage format.
- 34. The method of claim 32, wherein the holographic layer is accessible from a first side of the storage medium and the optical storage layer is accessible from a second side of the storage medium.
- 35. The method of claim 32, wherein an absorbing layer is disposed between the optical storage layer and the holographic layer.
- 36. The method of claim 32, wherein the holographic layer contains at least one of header information, servo information, or security information.
- 37. The method of claim 32, wherein the holographic layer and optical storage layer are accessible by the same optics.
- 38. A method for manufacturing a holographic storage medium comprising:
providing a holographic master data mask, wherein one or more data masks to be recorded on a holographic storage medium are located within the holographic master data mask; illuminating the one or more data masks onto the holographic storage medium with a plane wave object beam from a laser light source operating at a record wavelength; propagating a reference beam at an incident angle to the holographic storage medium to record the one or more data masks on the holographic storage medium; altering the incident angle of the reference beam for each of the one or more data masks, wherein each of the one or more data masks recorded on said holographic storage medium can be read bit by bit using a laser light source operating in a readout range of wavelengths different from the record wavelength.
- 39. The method of claim 38, wherein the reference beam and object beam are counterpropagating.
- 40. The method of claim 38, wherein the record wavelength is less than the readout range of wavelengths.
- 41. The method of claim 38, wherein the record wavelength is approximately 532 nanometers.
- 42. The method of claim 38, wherein the readout range of wavelengths is approximately 630 to 800 nanometers.
- 43. A method for manufacturing a holographic storage medium comprising:
providing a holographic master data mask, wherein one or more data masks to be recorded on a holographic storage medium are located within the holographic master data mask; propagating a plane wave object beam and reference beam from a laser light source operating at a first range of record wavelengths; illuminating the one or more data masks onto the holographic storage medium with the object beam; propagating the reference beam at fixed incident angle to the holographic storage media to record the one or more data masks on the holographic storage media; altering the record wavelength of the object beam and reference beam for each of the one or more data masks, wherein each of the one or more data masks recorded on said holographic storage medium can be read bit by bit using a laser light source operating in a readout range of angles different from the first range of record angles.
- 44. The method of claim 43, wherein the reference beam and object beam are counterpropagating.
- 45. The method of claim 43, wherein the first range of record wavelengths are less than the readout wavelength.
- 46. The method of claim 43, wherein the readout wavelength is between approximately 630 to 800 nanometers.
- 47. A method for manufacturing a holographic storage medium comprising:
providing one or more data masks with data to be recorded on a holographic storage medium; propagating a plane wave object beam and a reference beam from a laser light source; illuminating the one or more data masks onto the holographic storage medium with the object beam; varying the distance of at least the data mask or an image of the data mask from the holographic storage medium to record the one or more data masks on the holographic storage medium, wherein each of the one or more data masks recorded on said holographic storage medium can be confocally readout bit by bit.
- 48. The method of claim 47, further including:
propagating the reference beam at an incident angle to the holographic storage medium to record the one or more data masks on the holographic storage medium; altering the incident angle of the reference beam for each of the one or more data masks; and using a laser light source operating in a readout range of wavelengths different from the record wavelength.
- 49. The method of claim 47, further including:
propagating the plane wave object beam and the reference beam from a laser light source operating at a first range of record wavelengths; propagating the reference beam at fixed incident angle to the holographic storage media to record the one or more data masks on the holographic storage media; altering the record wavelength of the object beam and reference beam for each of the one or more data masks; and using a laser light source operating in a readout range of angles different from the first range of record angles.
- 50. The method of claim 47, wherein the reference beam and object beam are counterpropagating.
- 51. The method of claim 47, wherein the record wavelength for each data mask is less than the readout angle.
- 52. The method of claim 47, wherein image planes associated with the one or more data masks stored in the holographic memory are imaged outside of the storage medium.
- 53. The method of claim 47, wherein multiple layers associated with the one or more data masks are not physically within the storage medium.
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] The present application claims benefit of earlier filed provisional applications: U.S. Serial No. 60/349,146, entitled “Backward Compatible Holographic ROM and replication with different wavelength then readout,” filed on Jan. 15, 2002; U.S. Serial No. 60/371,549, entitled “Backward Compatible Holographic ROM and replication with different wavelength then readout,” filed on Apr. 9, 2002; and U.S. Serial No. 60/379,367, entitled “Backward Compatible Holographic ROM and replication with different wavelength then readout with temperature based laser diode,” filed on May 9, 2002, all of which are incorporated herein in their entirety by reference.
Provisional Applications (3)
|
Number |
Date |
Country |
|
60349146 |
Jan 2002 |
US |
|
60371549 |
Apr 2002 |
US |
|
60379367 |
May 2002 |
US |