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OPTICAL MEMORY STORAGE AND RETRIEVAL SYSTEM

  • US 3,765,749 A
  • Filed: 05/23/1972
  • Issued: 10/16/1973
  • Est. Priority Date: 05/23/1972
  • Status: Expired due to Term
First Claim
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1. An optical memory system which comprises:

  • a. a memory sheet of material whose optical transmission property at any selected page region can be locally modified by incident optical write-in radiation;

    b. first and second lens matrices located on opposite sides of the sheet;

    c. a first optical array of individual optical sources capable of producing a controllable pattern of optical write-in radiation incident upon the first lens matrix in a first direction and which is focused by each of the lenslets in the first lens matrix on a different page portion of the sheet, whereby the optical transmission property of the sheet can be modified in accordance with the pattern at one or more of said page portions; and

    d. a second optical array of individually controllable sources of optical readout radiation, each of which is arranged to furnish readout optical radiation incident in the opposite direction from the first direction upon at least one diffeRent lenslet in the second lens matrix, thence past an optical stop means in an array of such optical stop means and through a lenslet of the first lens matrix for focusing on an array of photodetectors, each of such lenslets arranged to transmit said readout optical radiation to a different page portion of the sheet.

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