Providing a representation of information stored in a hologram
AssigneeRCA Corporation
InventorMichael Jay Lurie
Life of this patent
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Abstract
A holographic recording of a plurality of rows of informational elements, which may represent a binary number, is successively illuminated by each of a plurality of light sources, where the number of light sources equals the number of rows of elements. In response to the successive illumination, a holographic reconstruction of the elements is projected upon photodetectors disposed along a line in a projection plane. The illumination may be instead by a deflected beam having an angle of incidence with the recording which changes at a vertical scan rate. In response to the deflected beam, a holographic reconstruction of horizontal lines of the elements are successively projected upon the photodetectors.
Claims4
Apparatus used with a hologram for providing a signal representation of first and second groups of elements of an image recorded in said hologram, comprising:
- reconstructing means for providing a single beam of light incident to said hologram:
- means for controlling the angle of incidence of said beam with said hologram;
- and
- detector means, including a fixedly disposed array of photodetectors, for providing a signal representation of elements of said first and second groups in response to a projection of holographic reconstructions thereof caused by said beam having first and second angles of incidence, respectively.
Dependencies are inferred from the claim text.