Acousto-optical data input transducer with optical data storage and process for operation thereof

In an apparatus for holographically recording data on a storage medium with the data being block-organized holographic data, said apparatus comprising means providing a coherent reference beam and a laser beam having a coherent optical plane wave, means for spatially modulating the laser beam into a plurality of object beams, means for directing the plurality of object beams at a storage medium to interfere with the reference beam to form the holographic recording on the storage medium, the improvements comprising said means for spatially modulating comprising an acousto-optical light deflector having a large area piezoelectric sound transducer disposed on one side thereof, said sound transducer having n electrodes spaced thereon to form n transducer units, means associated with each electrode for creating and applying a signal to each electrode with the signal being a frequency mixture of m frequencies to deflect the beam passing through each unit into m beam directions with the light frequency of each beam direction having a Doppler shift associated with the amount of deflecting, said means for directing the object beams including a lens raster consisting of n times m lens elements arranged in such a manner that each of the individual object beams produced by the means for modulating is widened to illuminate the entire storage medium, and said apparatus including means compensating for the Doppler shift in the light frequency of each of the object beams so that the capacity of interference of each of the object beams with the reference beams is maintained.