Holographic memory read by a laser array

Details Holographic memory read by a laser array Holographic memory read by a laser array

G - Physics

03

H

88/0.12

G03H 1/22 (2006.01) G11B 7/0065 (2006.01) G11C 13/04 (2006.01) G11C 17/00 (2006.01)

Patent

CA 2022126

A holographic memory read-out system in which multiple pages of information are angularly multiplexed onto a recording medium, either planar or volume. For read-out of the hologram, a selected one of a plurality of surface-emitting semiconductor lasers arranged in a two-dimensional array is activated. The coherent output beam is passed through a collimating lens which produces a coherent plane-wave having a direction dependent upon which laser in the array produced the output beam. The plane-wave uniformly irradiates the recording medium to thereby diffract a selected image at a set angle to an imaging apparatus.

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