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    SERVO SYSTEM FOR ADJUSTING POSITIONS OF PLURALITY OF SPOTS OF HOLOGRAPHIC DUPLICATION SYSTEM
    1.
    发明专利
    SERVO SYSTEM FOR ADJUSTING POSITIONS OF PLURALITY OF SPOTS OF HOLOGRAPHIC DUPLICATION SYSTEM 审中-公开

    公开(公告)号：JP2012109008A

    公开(公告)日：2012-06-07

    申请号：JP2011248253

    申请日：2011-11-14

    Applicant: GEN ELECTRIC

    Inventor： WANG XUEFENG ,  PIERINO GIANNI BONANNI ,  SHI XIAOLEI ,  REN ZHIYUAN ,  XIA HUA ,  OSTROVERKHOV VICTOR PETROVICH ,  XINGHUA WANG

    IPC: G11B7/09 ,  G11B7/0065 ,  G11B7/135 ,  G11B7/28

    Abstract: PROBLEM TO BE SOLVED: To provide a method and system for controlling recording of a micro-hologram to a plurality of data tracks of a holographic disk, using a plurality of reverse propagation light beams.SOLUTION: When a holographic disk is incomplete, or the disk is moved during a recording process, a signal beam is sometimes deviated from a target data track. According to an embodiment, a tracking beam is guided to a reference layer of the disk. Deviation of a reference beam from a target groove of the reference layer sometimes shows a tacking error. A detector detects reflection of the tracking beam, and an error signal can be generated in response to the detected tracking error. The tracking error can be compensated when a servo mechanical element activates (for example, performs parallel displacement, rotation and/or inclination in a radial, tangential or axial direction) one or more optical elements which emit reverse propagation light beams.

    FLOW METER AND A METHOD OF CALIBRATION
    2.
    发明专利
    FLOW METER AND A METHOD OF CALIBRATION 未知

    公开(公告)号：CA2913904A1

    公开(公告)日：2016-06-12

    申请号：CA2913904

    申请日：2015-12-03

    Applicant: GEN ELECTRIC

    Inventor： WANG XUEFENG

    IPC: G01F25/00

    Abstract: A system, comprising a first sensor that generates a first output signal representative of a first flow rate measurement in a first flow rate range of a fluid, a second sensor that generates a second output signal representative of a second flow rate measurement in a second flow rate range of the fluid that at least partially overlaps the first flow rate range of the fluid to form a partially overlapping region, a data repository storing a first calibration relationship corresponding to a first condition of the fluid and a second calibration relationship corresponding to a second condition of the fluid, wherein the first calibration relationship and the second calibration relationship correspond to the first sensor, and a processing subsystem that automatically generates a third calibration relationship when the second flow rate measurement falls in the partially overlapping region, wherein the third calibration relationship corresponds to a third condition of the fluid based at least on the first calibration relationship, the second calibration relationship, the first output signal and the second output signal.

    SERVO STRUCTURE IN SINGLE-BIT HOLOGRAPHIC VOLUME RECORDING AND READOUT
    3.
    发明专利
    SERVO STRUCTURE IN SINGLE-BIT HOLOGRAPHIC VOLUME RECORDING AND READOUT 未知

    公开(公告)号：CA2762713A1

    公开(公告)日：2012-06-29

    申请号：CA2762713

    申请日：2011-12-22

    Applicant: GEN ELECTRIC

    Inventor： REN ZHIYUAN ,  SHI XIAOLEI ,  OSTROVERKHOV VICTOR PETROVICH ,  WANG XUEFENG

    IPC: G11B7/0065 ,  G11B7/0037

    Abstract: Methods and systems are provided for recording micro-holograms in a holographic disk. Disk tilting or disk imperfections may cause counter-propagating recording and reference beams to deviate from the target data position in the disk. In some embodiments, a tracking beam is directed to a tracking position in the disk, and deviation of the tracking beam from the tracking position may indicate tracking and/or focusing errors of the recording and/or reference beams. A detector may generate an error signal in response to such errors. A first servo-mechanical system may actuate a first optical head (e.g., transmitting the reference and tracking beams) to compensate for such errors, and a second servo-mechanical system may actuate a second optical head (e.g., transmitting the recording beam) to follow the actuation of the first servo system, such that an interference of the reference beam and the recording beam may be maintained in the target data position.

    CODING FOR OPTICAL STORAGE SYSTEMS WITH MULTIPLE READER HEADS AND MULTIPLE OPTICAL DISKS
    4.
    发明专利
    CODING FOR OPTICAL STORAGE SYSTEMS WITH MULTIPLE READER HEADS AND MULTIPLE OPTICAL DISKS 未知

    公开(公告)号：CA2737196A1

    公开(公告)日：2011-10-28

    申请号：CA2737196

    申请日：2011-04-14

    Applicant: GEN ELECTRIC

    Inventor： ROSS JOHN ANDERSON FERGUS ,  HERSHEY JOHN ERIK ,  SHI XIAOLEI ,  WANG XUEFENG

    IPC: G11B7/004 ,  G11B7/007 ,  G11B7/08 ,  H03M13/45

    Abstract: Provided are methods and systems of encoding and decoding techniques in an optical storage system having a multi-head detector. In one embodiment, source data may be encoded using error correction coding (e.g., turbo coding) techniques, and the encoded data may be interleaved and distributed to more than one detector head of the multi-head detector. Data recorded in an optical disc may be retrieved by the multi-head detector, and a read data from more than one detector head may be concurrently decoded to retrieve estimates of the original information in the source data. Further, more than one encoder/decoder may be used, and each encoder/decoder may encode or decode data from multiple data heads. Some embodiments also include replicating multiple discs.

    Multi-stage focus actuator and optical head for holographic disc
    5.
    发明专利
    Multi-stage focus actuator and optical head for holographic disc 未知

    公开(公告)号：GB2486785A

    公开(公告)日：2012-06-27

    申请号：GB201121543

    申请日：2011-12-15

    Applicant: GEN ELECTRIC

    Inventor： WANG XUEFENG ,  HERSHEY JOHN ERIK ,  REN ZHIYUAN ,  LI XIAOHONG

    IPC: G11B7/09 ,  G11B7/0065

    Abstract: A multi-stage actuator 26 actuates one or more optical components 14 of an optical head for a holographic disc 12. The multi-stage actuator includes a coarse or cross-layer displacement component 25 which actuates an optical component to change the beam focus in a displacement range corresponding to the total thickness of the plurality of data layers in a holographic disk 12, such that a beam 16 is impinged on the target data layer. The multi-stage actuator also includes a fine or intra-layer focusing component 27 which actuates the optical component 14 in a smaller range to focus the beam on the target data position. The cross-layer displacement component 25 and the intra-layer focusing component 27 may each include more than one actuator. The focusing component 27 can also actuate the optical component in a tilting motion to compensate for movement or imperfections of the disk during a reading or recording process.

    Precise servoing on holographic disc
    9.
    发明专利
    Precise servoing on holographic disc 未知

    公开(公告)号：GB2486049A

    公开(公告)日：2012-06-06

    申请号：GB201119448

    申请日：2011-11-11

    Applicant: GEN ELECTRIC

    Inventor： REN ZHIYUAN ,  SHI XIAOLEI ,  WANG XUEFENG

    IPC: G11B7/08 ,  G11B7/085

    Abstract: A method for servoing when reading out a recorded holographic disc or recording in a preformatted holographic disc, includes detecting a primary signal 86 of a reflected primary beam from a target data track of a target data layer. The primary beam of radiation having a first wavelength. Power measurement 94 of the primary signal is compared 96 with a threshold value of power. A tracking signal 90 of a reflected tracking beam from a reference layer of the holographic disc is detected in an event that the power measurement of the primary signal is below the threshold value of power. The tracking beam of radiation has a second wavelength. A servo error signal 100, 102 is generated based upon the primary signal or the tracking signal and an optical sub-system 108 is actuated based upon either of the primary servo error signal or the tracking servo error signal such that the primary beam focuses on the target data layer. Alternatively the optical sub-system may actuated based on the primary servo error signal and a tracking run-out profile.

    SERVOING SYSTEM FOR MULTIPLE SPOT REGISTRATION FOR HOLOGRAPHIC REPLICATION SYSTEM
    10.
    发明专利
    SERVOING SYSTEM FOR MULTIPLE SPOT REGISTRATION FOR HOLOGRAPHIC REPLICATION SYSTEM 未知

    公开(公告)号：CA2756897A1

    公开(公告)日：2012-05-18

    申请号：CA2756897

    申请日：2011-11-03

    Applicant: GEN ELECTRIC

    Inventor： WANG XUEFENG ,  BONANNI PIERINO GIANNI ,  SHI XIAOLEI ,  REN ZHIYUAN ,  XIA HUA ,  OSTROVERKHOV VICTOR PETROVICH ,  WANG XINGHUA

    IPC: G11B7/0065 ,  G11B7/135

    Abstract: The present techniques provide methods and systems for controlling the recording of micro-holograms using multiple counter-propagating light beams over multiple data tracks of a holographic disk. Imperfections in a holographic disk or movement of the disk during a recording process may cause signal beams to deviate from target data tracks. In some embodiments, a tracking beam is directed to a reference layer in the disk. Deviation of the reference beam from a target groove in the reference layer may be indicative of tracking errors. A detector may detect reflections of the tracking beam and generate an error signal in response to detected tracking errors. Servo-mechanical devices may actuate (e.g., radially, tangentially, or axially translate, rotate, and/or tilt) one or more optical components through which the counter-propagating light beams are emitted to compensate for tracking errors.

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