Devices for recording or reading out an encoded hologram

Details Devices for recording or reading out an encoded hologram Devices for recording or reading out an encoded hologram

G - Physics

11

B

G11B 7/0065 (2006.01) G11C 13/04 (2006.01)

Patent

CA 2579293

The invention relates to devices for recording or reading out an encoded hologram. Said devices are designed in such a way as to record or to read out spatially separated data structures, and data holograms (36) and positioning holograms (37) which are spatially separated from each other and are associated with positioning structures that are structurally simple in relation to the data structures. Said positioning holograms (37) can be evaluated separately from the data holograms (36) in order to align a modulation pattern in an iteration. In this way, the hologram can be relatively easily correctly oriented even in the event of complex data structures or modulation structures.

L'invention concerne des dispositifs qui servent à enregistrer ou à lire un hologramme codé et qui sont configurés pour l'enregistrement ou la lecture de structures de données séparées spatialement les unes des autres, ainsi que d'hologrammes de données (36) et d'hologrammes de positionnement (37) également séparés spatialement les uns des autres et affectés à des structures de positionnement structurellement simples par rapport aux structures de données. Les hologrammes de positionnement (37) peuvent être évalués séparément des hologrammes de données (36) pour l'alignement d'un motif de modulation dans une itération. Il est ainsi possible d'orienter l'hologramme correctement et de manière relativement simple, même en présence de structures de données ou de structures de modulation complexes.

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