Systems for forming improved diffusion holograms

Details Systems for forming improved diffusion holograms Systems for forming improved diffusion holograms

1981-06-01

1984-06-26

Arnold, Bruce Y.

G03H 102

Patent

active

044563280

ABSTRACT:
The hologram forming systems of the invention form diffusion type holograms in which undesired spurious transmission hologram recordings are eliminated. The reflecting surfaces are moved during the recording process so that the reflected rays change in phase relative to the primary recording beams and spurious holograms cannot be recorded with sufficient intensity to form undesired reflections in the developed hologram. Thus, pictorial type holograms such as jewelry holograms or art holograms do not present undesired ghost images or flare patterns to the viewer. The concepts of the invention also include formation of diffusion type holograms for high gain directional viewing screens.

REFERENCES:
patent: 3494698 (1970-02-01), Neumann
patent: 3572882 (1971-03-01), Neumann
patent: 3632182 (1972-01-01), Sincerbox
patent: 3635539 (1972-01-01), McMahon
patent: 3659947 (1972-05-01), Neumann
patent: 3666344 (1972-05-01), Mottier
patent: 3762215 (1973-10-01), Aleksoff
Acoustical Holography, vol. 5, pp. 41-45, Ed. P. S. Green (Plenum Press).
Optical Holography, pp. 418-425, 437-438, Collier et al., (Academic Press 1971).
Laser Applications, vol. 1, pp. 42-49, Ed. M. Ross (Academic Press 1971).

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