Polytopic multiplex holography
Disclosed is a multiplexing method and apparatus that allows holograms to be spatially multiplexed with partial spatial overlap between neighboring stacks of holograms. Each individual stack can additionally take full advantage of an alternate multiplexing scheme such as angle, wavelength, phase cod...
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Format: | Patent |
Sprache: | eng ; fre ; ger |
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Zusammenfassung: | Disclosed is a multiplexing method and apparatus that allows holograms to be spatially multiplexed with partial spatial overlap between neighboring stacks of holograms. Each individual stack can additionally take full advantage of an alternate multiplexing scheme such as angle, wavelength, phase code, peristrophic, or fractal multiplexing, for example. An amount equal to the beam waist (216) of the signal beam (212) writing a hologram separates individual stacks of holograms. Upon reconstruction, a hologram and its neighbors will all be readout simultaneously. An filter (130,230) is placed at the beam waist (116a,216a) of the reconstructed data such that the neighbors (116b,216b) that are read out are not transmitted to the camera plane (246). Alternatively, these unwanted reconstructions can be filtered out with an angular filter (630) at an intermediate plane in the optical system that has a limited angular passband. |
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