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AssigneeAmethystum Storage Technology Co., Ltd.
InventorsMu ZHENG, Tiewei LUO, Jun TIAN, Dejiao HU, Yicheng LIU
Estimating the term…
The invention relates to a positioning method and device for a hologram in a card-type holographic storage medium, which can be used for beam positioning of cross-shift multiplexing and belong to the technical field of optical holographic storage. A guide groove in a grid shape is engraved on a card-type storage medium, and is provided with positioning markers. Each marker includes position information and direction information, can control an optical head to move along the guide groove, and shift multiplexing/reproducing is performed when recognizing the positioning markers. Since the card-type medium is adopted, a 90-degree rotation can be executed three times, and a total of four times of shift multiplex recording is performed. Random access can be achieved even in a medium that is rotated and used by adopting the positioning method and device described in the present invention.
A positioning method for a hologram in a card-type holographic storage medium, comprising recording a guide groove on a recording area of a card-type storage medium in a manner of two-dimensional grid pattern in order to achieve cross-shift multiplex recording.
A positioning method for a hologram in a card-type holographic storage medium used to position a recording/reproducing beam when recording/reproducing the hologram, wherein markers provided on a guide groove of a storage medium are taken as starting positions of recording/reproducing, the recording/reproducing beam is positioned first with a positioning beam detection marker when recording/reproducing is performed, and shift multiplex recording/reproducing is performed when detecting the marker.
A positioning device for a hologram in a card-type holographic storage medium, comprising:
Dependencies are inferred from the claim text.