Apparatus for high density holographic optical data storage

Patent 4998236 Issued on March 5, 1991. Estimated Expiration Date:

August 25, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

3771150

3829838

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Inventor

Henshaw, Philip D.

Assignee

Sparta, Inc.

Application

No. 236604 filed on 08/25/1988

US Classes:

369/103, Holographic706/40Radiant energy neural network

Examiners

Primary: McElheny, Donald Jr.

Attorney, Agent or Firm

Engellenner; Thomas J., Jacobs; David A.

International Class

G11B 007/00

Abstract

Methods and apparatus for writing and reading data provide storage in a volume of memory material consisting of inhomogenously broadened absorption centers such that a beam of electromagnetic radiation controlled to be independently steered and simultaneously shifted in wavelength can access information stored in four independent dimensions, three spatial and one spectral. The memory medium can be utilized to write and read a selectable connection matrix between two completely populated two-dimensional memory planes.

Other References

Psaltis, Demetri, DARPA, Conference, Feb. 1988
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