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Waveform-decomposition-based algorithm for horizontal parallax-only-display computer-generated holograms

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Abstract

A fast algorithm to compute a scattering pattern produced by a two-dimensional object is presented. Rather than by use of an approximation, this algorithm is derived by decomposition of the spherical nature of a radiation pattern into the sum of plane waves. Thus it precludes the phase errors that exist in approximation-based Fresnel holograms. Moreover, the amount of computation required in this method is shown to be significantly smaller than that of a well-known ray-tracing method; excellent performance, as good as one could obtain with the ray-tracing method, is achieved. Implementation results as well as sampling constraints are also presented.

© 1996 Optical Society of America

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