Invention Grant
- Patent Title: Apparatus and method to align the elements of a holographic information data storage system
- Patent Title (中): 对齐全息信息数据存储系统的元件的装置和方法
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Application No.: US11622931Application Date: 2007-01-12
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Publication No.: US07768683B2Publication Date: 2010-08-03
- Inventor: Allen Keith Bates , Daniel James Winarski
- Applicant: Allen Keith Bates , Daniel James Winarski
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agency: Quarles & Brady LLP
- Agent Dale F. Regelman
- Main IPC: G03H1/08
- IPC: G03H1/08 ; G02B5/32 ; G06K9/76

Abstract:
A method to align the write channel portion of a holographic data storage system, wherein the method establishes a write threshold correlation factor, provides a reference beam, and illuminates a holographic data storage medium encoded with a write reference orientation image with the reference beam to generate a write channel alignment data beam including a projected write reference orientation image. The method projects the write channel alignment data beam onto an optical detector, and calculates a first write correlation factor using the projected write reference orientation image, a stored write reference orientation image, and the tangential matched filter. If the method determines that the first write correlation factor is greater than or equal to the write threshold correlation factor, then the method determines that the spatial write channel is properly aligned.
Public/Granted literature
- US20080170281A1 Apparatus and method to align the elements of a holographic information data storage system Public/Granted day:2008-07-17
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