Holographic memory read by a laser array

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