Computer aided holography and holographic computer graphics

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350376, 350 385, G03H 126, G03H 108

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active

047782625

ABSTRACT:
Methods for generating holograms from a computer model of any object using a combination of numerical and optical means and the holograms produced thereby. An illumination model is provided to specify sources of light rays and dispersion particles of the object. Each light ray being specified by a path and an intensity function is traceable from a source via the object to a set of points in space by the computer. The hologram is synthesized from a plurality of smaller hologram elements. Each individual element sustains a field of view of the object. The light rays from the object lying within the field of view and along the lines of sight are sampled by the computer. Optical means are employed to physically reproduce the sampled light rays using coherent radiation. The reproduced coherent light rays are then interfered with a coherent reference beam to form the hologram element. Alternatively, the hologram elements are calculated by the computer with an analogous technique.

REFERENCES:
patent: 3832027 (1974-08-01), King
patent: 4339168 (1982-07-01), Haines
patent: 4364627 (1982-12-01), Haines
patent: 4411489 (1982-11-01), McGrew
Rosen, "Focused Image Holography with Extended Sources", Applied Physics Letters, vol. 9, No. 9, pp. 337-339 (Nov. 1, 1966).
King et al., "A New Approach to Computer-Generated Holography", Applied Optics, vol. 9, No. 2, pp. 471-475 (Feb. 1970).
Goldstein et al., "3-D Visual Simulation", Simulation, pp. 25-31 (Jan. 1971).
Whitted, "An Improved Model for Shaded Display," Communication of the Assoc. for Computing Machinery, vol. 23, No. 6, pp. 343-349 (Jun. 1980).
"Topical Meeting on Holography Technical Digest", Mar. 31-Apr. 2, 1986 (cover sheet and three abstracts).
Teitel and Benton, "Anamorphic Imaging for Synthetic Holograms", (Abstract), Journal of the Optical Society of America, Dec. 1986.
Holzbach, "Three-Dimensional Image Processing for Synthetic Holographic Stereograms", MIT Masters Thesis (1986).

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