| 摘要 |
The present invention relates to a holographic storage medium (10), and more specifically to a holographic storage medium (10) with an improved servo architecture for precise positioning of a laser beam in radial, axial and tangential direction. According to the invention, a holographic storage medium (10) includes a holographic layer (42) for storing holograms and a servo layer (44) with a track structure (40) for positioning a light beam (7, 8) for reading and/or recording of a hologram relative to the holographic recording medium (10), wherein the track structure (40) includes a pack of two or more tracks (48, 49).
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