Tracking technology of holographic data storage medium

摘要

In one embodiment, (63), and I include (64) a detectable optical pattern tracing medium (60) on (61, 62), holographic recording material substrate holographic data storage medium (60). The substrate may comprise a substrate portion of the second (62) and (61) first. Well, a sandwich structure which is sandwiched between the substrate portion of the second (62) and (61), first (63) holographic recording material (60) medium and a photosensitive polymer (63) holographic recording material It may not make. I can replicate in substrate portion on at least one (64) a light detectable tracking pattern. Alternatively, I can be recorded as a holographic diffraction grating holographic recording material (63) in (64) a light detectable tracking pattern. Tracking pattern by (64), to identify possible in a fraction of the μm the location of the holographic bitmap holographic medium (60) on.