Holographic exposure system to reduce spurious hologram noise

Details Holographic exposure system to reduce spurious hologram noise Holographic exposure system to reduce spurious hologram noise

1989-08-31

1991-01-15

Arnold, Bruce Y.

350 369, 350 38, G03H 120

Patent

active

049848569

ABSTRACT:
A method and apparatus of exposing a hologram to reduce spurious noise holograms. The exposure light source is moved relative to a recording module within predetermined distances that will ensure a blurring of the fringes of a noise hologram that is formed at a distance from a primary hologram while substantially not affecting the primary hologram. The controlled relative movement of the exposure source and the recording module within predetermined limits provide a considerable improvement in reducing the efficiency of spurious noise holograms.

REFERENCES:
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patent: 4458977 (1984-07-01), Arns et al.
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patent: 4530564 (1985-07-01), Close
patent: 4715670 (1987-12-01), Jurukhano
patent: 4895419 (1990-01-01), Doyle et al.

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