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HOLOGRAPHIC METHOD AND APPARATUS FOR INFORMATION STORAGE AND RETRIEVAL

  • US 3,620,590 A
  • Filed: 05/27/1969
  • Issued: 11/16/1971
  • Est. Priority Date: 05/27/1969
  • Status: Expired due to Term
First Claim
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1. A holographic method of storing and retrieving information comprising the steps of creating a holographic image of the information to be stored, recording the image containing the information as a hologram on a photosensitive medium along with a holographic image of a master code on said photosensitive medium, said master code consisting of holographic images which scramble said information so that said information cannot be recreated out of said hologram in the absence of said code, then retrieving said information by aligning said hologram and a second hologram containing said master code along a common optical axis, and translating said hologram and second hologram relative to each other in a reciprocating manner transversely across said optical axis so as to remove the scrambling effect, and displaying said information using a holographic display means.

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