Optical: systems and elements – Holographic system or element – Having particular recording medium
Patent
1992-06-29
1993-06-29
Arnold, Bruce Y.
Optical: systems and elements
Holographic system or element
Having particular recording medium
359 23, 359 30, 359 35, 359900, G03H 104, G03H 126
Patent
active
052239551
ABSTRACT:
Apparatus and method for storing holographic synthesized information for reflection integral Bragg holograms, free of the limitations of dispersing elements (such as unilateral diffusing screens, conventional lenticular screens and Fresnel lenses), multiple reference beams, mirrorized indexing or other similar materials or techniques. These holograms accurately satisfy Bragg's condition, provide an expanded (and essentially normal) vertical viewing range and can be displayed both flat (in which case the image is behind the film plane) or concave towards the viewer (in which case the image is in front of the film plane). Flat and curved holograms can be combined together. The final holographic images are produced directly from motion picture film, without intermediate transfer prints as required by the prior art. All are front illuminated. By curving the developed hologram for viewing a high definition projection image is obtained.
REFERENCES:
patent: 3758649 (1973-09-01), Frattarola
patent: 4206965 (1980-06-01), McGrew
patent: 4364627 (1982-12-01), Haines
patent: 4411489 (1983-10-01), McGrew
patent: 4429946 (1984-02-01), Haines
patent: 4834476 (1989-05-01), Benton
patent: 5046792 (1991-09-01), Zabka
Arnold Bruce Y.
Morgan DeWitt M.
Parsons David R.
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