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US 6,636,336 B2Granted
Apparatus for making holograms including means for controllably varying a beamsplitter
AssigneeVoxel, Inc.
InventorStephen J. Hart
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Abstract
A method and apparatus for making holograms includes a technique for exposing a film substrate or other light-sensitive medium to consecutive two dimensional images, together representative of a physical three-dimensional system, to generate a three dimensional hologram of the physical system. Low beam ratios are employed to superimpose multiple (20-300) images on the substrate. Each image is relatively weak, but the combination of the series of weak images ultimately appears as a single clearly defined hologram.
Claims25
An apparatus for making holograms, comprising:
- a reference beam source for generating a reference beam;
- an object beam source for generating an object beam;
- a photosensitive material having a first surface and a second surface, said photosensitive material disposed in the beam paths of the beams generated by said reference beam source and said object beam source;
- an object assembly for sequentially transmitting multiple two-dimensional images of a plurality of data slices upon said photosensitive material,
- means for varying the apparent distance between said object assembly and said photosensitive material, such that each of said two dimensional images is transmitted onto said photosensitive material at a predetermined apparent respective distance from said photosensitive material;
- and,
- a second means for controllably varying a beam splitter assembly to allocate said reference beam and said object beam source into said reference and object beam in accordance with the image content of a plurality of data slices.
4 more elements
Dependencies are inferred from the claim text.