Digital recording using hologram arrays: Some initial experiments in 100 M bit/s recording

The construction of an experimental holographic recorder has advanced sufficiently to carry out some initial experiments and to obtain some sample recordings of hologram tracks written on continuously moving photographic film. The hologram exposures and data transfer rates were commensurate with those values required for digital television recording. Careful analysis of the reconstructed hologram images from the test recordings has revealed some problems associated with the film and its processing for this application. The results have also directed attention to several critical areas of the proposed system and underlined the deficiencies still remaining in the principal transducers such as the page-composer and the digital light-deflector.