Invention Grant
US08446808B2 Use of feedback error and/or feed-forward signals to adjust control axes to optimal recovery position of hologram in holographic data storage system or device
有权
使用反馈误差和/或前馈信号来调整控制轴到全息数据存储系统或设备中的全息图的最佳恢复位置
- Patent Title: Use of feedback error and/or feed-forward signals to adjust control axes to optimal recovery position of hologram in holographic data storage system or device
- Patent Title (中): 使用反馈误差和/或前馈信号来调整控制轴到全息数据存储系统或设备中的全息图的最佳恢复位置
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Application No.: US12351047Application Date: 2009-01-09
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Publication No.: US08446808B2Publication Date: 2013-05-21
- Inventor: Mark R. Ayres , Alan Hoskins , Paul C. Smith , John J. Kane
- Applicant: Mark R. Ayres , Alan Hoskins , Paul C. Smith , John J. Kane
- Applicant Address: US CO Longmont
- Assignee: Akonia Holographics, LLC
- Current Assignee: Akonia Holographics, LLC
- Current Assignee Address: US CO Longmont
- Agency: Morrison & Foerster LLP
- Main IPC: G11B7/00
- IPC: G11B7/00
Abstract:
A method for adjusting at least one alignment control axis of a holographic data storage system or device to or towards a sufficiently optimal recovery position for recovery of a hologram based on a derived feedback error signal and/or a derived feed-forward signal. For the next hologram in the sequence, the derived feedback error signal estimates the direction and magnitude of misalignment of the at least one alignment control axis for one or more previously recovered holograms based on alignment-indicating data. The derived feed-forward signal estimates an optimal alignment value for the at least one alignment control axis for one or more holograms based on recording and recovery operating condition data for the holograms. An iterative alignment procedure may also be used to derive a feedback error signal for one hologram.
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