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AssigneeAmethystum Storage Technology Co., Ltd.
InventorsMu ZHENG, Tiewei LUO, Jun TIAN, Dejiao HU, Yicheng LIU
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The present invention relates to a method for accurately detecting and controlling a position of an optical head. According to the present invention, by utilizing the narrow shift selectivity of a spherical reference beam shift multiplexing technology, a control area that includes an x-direction position control unit and a y-direction position control unit and that is separated from a data area is formed in a storage medium. Like the data area, holograms of special patterns are recorded in the control area, when the data is read, information in the control area is read first, and the position of the optical head relative to the hologram in the data area can be detected in the x direction and the y direction respectively according to the information read by the hologram in the control area, so that reference light is controlled to the correct position shown by the address.
A method for accurately detecting and controlling a position of an optical head of an optical disk, wherein a spherical wave is used as reference light for cross-shift multiplexing holographic storage, and a position deviation signal is obtained by using holograms staggered in a position control unit in a storage medium for accurate detection and control of the position of the optical head.
A method for accurately detecting and controlling a reading position of an optical disk for reading data stored in an optical disk as a storage medium, wherein data units stored in the storage medium comprise position control units, and the method comprises:
A device for accurately detecting and controlling a reading position of an optical disk, comprising:
Dependencies are inferred from the claim text.