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AssigneeInternational Business Machines Corporation
InventorsAllen Keith Bates, Daniel James Winarski
Estimating the term…
A method to align the write channel portion of a holographic data storage system. 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.
A method to align the read channel portion of a holographic data storage system, comprising the steps of:
An optical detector disposed in a holographic information reading system, said optical detector comprising an input screen, a processor, a computer readable medium, a read threshold correlation factor, a read reference orientation image, a tangential matched filter, a first rotated matched filter, and a second rotated matched filter, encoded in said computer readable medium, computer readable program code encoded in said computer readable medium, said computer readable program code being useable with said processor to align said optical detector, the computer readable program code comprising a series of computer readable program steps to effect:
Dependencies are inferred from the claim text.