Abstract
THE application of holography to character recognition has been receiving a great deal of attention. A recent report by Gabor1 introduced a somewhat different approach to the problem, based on a principle “that if two coherent waves are made to fall simultaneously on a photographic plate, one coming from an object A, the other from an object B, the photograph links these together in such a way that if the hologram is illuminated by A alone, B will appear too, and vice versa”. I now present some experimental investigations based on this approach.
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References
Gabor, D., Nature, 208, 422 (1965).
Van Heerden, P. J., Appl. Optics, 2, 387 (1963).
Stroke, G. W., Restrick, R., Funkhouser, A., and Brumm, D., Appl. Phys. Letters, 7, 178 (1965); and Phys. Letters, 18, 274 (1965).
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WATRASIEWICZ, B. Character Recognition by Holography. Nature 216, 302–304 (1967). https://doi.org/10.1038/216302a0
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DOI: https://doi.org/10.1038/216302a0
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