Optical: systems and elements – Holographic system or element – For synthetically generating a hologram
Patent
1990-11-06
1993-03-16
Arnold, Bruce Y.
Optical: systems and elements
Holographic system or element
For synthetically generating a hologram
359 22, 359 29, 359 32, G03H 126, G03H 108
Patent
active
051949717
ABSTRACT:
Methods for generating holograms from a computer model of any object employ a combination of numerical and optical means. An illumination model and the light dispersion properties of the object are specified. 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. The sample density should not exceed the resolution limit set by the size of the hologram element. Each light ray is specified by a direction and an amplitude function. The hologram element is obtainable from a Fourier Transform fo the sampled rays. In one embodiment, 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 interference pattern is calculated directly by the computer and is printed to form the hologram element.
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American Bank Note Holographics, Inc.
Arnold Bruce Y.
Parsons David R.
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