Multilevel data structure
View Patent ↗A method of performing writable optical recording of a medium to form multilevel oriented nano-structures therein, comprises steps of providing a disc-shaped, writable recording medium having a planar surface; and encoding data/information in the medium by forming a plurality of multilevel nano-structured pits in the surface by scanning with a focused spot of optical energy to form at least one data track therein, including scanning the optical spot in a cross-track direction while rotating the disc about a central axis.
1. An apparatus, comprising:
scanning components adapted to scan an optical spot in a cross-track direction across a recording medium to encode multilevel data structures therein while said recording medium is rotated about a central axis; and
recording angle controlling components coupled to said scanning components adapted to control a recording angle of said optical spot, wherein said recording angle controlling components control said recording angle by varying one of a cross-track scan velocity of said optical spot and a down-track velocity of said recording medium.
2. The apparatus of claim 1 , wherein said scanning components comprise an electro-optic scanner.
3. The apparatus of claim 1 , wherein said scanning components vary a position of said incoming beam of optical energy within an SIM.
4. The apparatus of claim 3 , wherein said recording angle controlling components one of add a variable phase delay to one half of said SIM and utilize a combination of liquid crystal displays and anamorphic lenses for varying said position of said incoming beam within said SIM.
5. The apparatus of claim 1 , wherein said recording angle controlling components focus two separate beams onto said surface of said recording medium to have a cross-track offset.
6. An optical recording apparatus, comprising:
scanning components adapted to scan an optical spot in a cross-track direction across a recording medium to encode multilevel data structures therein, wherein said scanning components vary a position of an incoming beam of optical energy within a solid immersion mirror (SIM);
recording angle controlling components coupled to said scanning components adapted to control a recording angle of said optical spot; and
recording medium controlling components operable to rotate said recording medium about a central axis during said scan.
7. The apparatus of claim 6 , wherein said recording medium controlling components comprise a spindle.
8. The apparatus of claim 6 , wherein said scanning components comprise an electro-optic scanner.
9. The apparatus of claim 6 , wherein said recording angle controlling components control said recording angle by varying one of a cross-track scan velocity of said optical spot and a down-track velocity of said recording medium.
10. The apparatus of claim 6 , wherein said recording angle controlling components one of add a variable phase delay to one half of said SIM and utilize a combination of liquid crystal displays and anamorphic lenses for varying said position of said incoming beam within said SIM.
11. A non-transitory computer-readable medium having stored thereon computer-executable instructions that if executed by a device cause the device to perform a method, said method comprising:
scanning an optical spot in a cross-track direction across a storage medium to encode multilevel data structures therein while rotating said storage medium about a central axis; and
controlling a recording angle of said optical spot, wherein said controlling said recording angle comprises varying one of a cross-track scan velocity of said optical spot and a down-track velocity of said medium.
12. The computer-readable medium of claim 11 , wherein said controlling said recording angle comprises controlling said recording angle to a range of 11° to 170° when a ratio of a down-track velocity to a cross-track scan velocity is in a range of 10:1 to 1:10 and to a range of 1° to 180° when said ratio is in a range of 100:1 to 1:100.
13. The computer-readable medium of claim 12 , wherein said controlling said recording angle comprises controlling said ratio to a value of 2:1.
14. The computer-readable medium of claim 11 , wherein said storage medium comprises a writable, disk-shaped, recording medium that includes a surface layer that is about 10 to about 50 nm thick and comprises CoPtO x , where x is in a range of about 2 to about 20.
15. The computer-readable medium of claim 11 , wherein said storage medium comprises a writable, disk-shaped, recording medium that includes a surface layer that is about 10 to about 50 nm thick and comprises PtO x , where x is in a range of 2 to about 20.
16. The computer-readable medium of claim 11 , wherein said storage medium comprises one of a writable and a re-writable disk-shaped recording medium with at least a surface layer comprising a material selected from a group consisting of phase change materials, dye polymers, eutectic metal alloys, and magneto-optical recording materials.
17. A method, comprising:
scanning an optical spot in a cross-track direction across a recording medium to encode multilevel data structures therein while rotating said recording medium about a central axis; and
controlling a recording angle of said optical spot, wherein said controlling said recording angle comprises focusing two separate beams onto said surface of said recording medium to have a cross-track offset.
18. The method of claim 17 , wherein said controlling said recording angle comprises varying one of a cross-track scan velocity of said optical spot and a down-track velocity of said recording medium.
19. The method of claim 17 , wherein said controlling said recording angle comprises controlling said recording angle to a range of 11° to 170° when the ratio of a down-track velocity to a cross-track scan velocity is in a range of 10:1 to 1:10 and to a range of 1° to 180° when said ratio is in a range of 100:1 to 1:100.
20. The method of claim 19 , wherein said controlling said recording angle comprises controlling said ratio to a value of 2:1.
21. The method of claim 17 , wherein said controlling said recording angle comprises moving said optical spot faster in said cross-track direction than in said down-track direction.
22. The method of claim 17 , wherein said controlling said recording angle comprises scanning said optical spot at a cross-track scan velocity of ˜40 m/sec, and a down-track disk velocity of 4˜m/sec.