Double beam systems for forming improved holograms

Details Double beam systems for forming improved holograms Double beam systems for forming improved holograms

1981-06-01

1984-07-10

Arnold, Bruce Y.

350 383, G03H 102

Patent

active

044589786

ABSTRACT:
The systems of the invention form improved reflection and transmission holograms utilizing two beams and eliminating all of the higher energy spurious holographic recordings that are caused by reflections of rays from the outer surfaces of the cover plates. The systems provide movement of the cover plate or movement of the substrate and recording medium during the recording period to prevent formation of the spurious recordings. In some arrangements of the invention, global phase shifters are utilized to maintain the phase of the primary rays forming the desired hologram at a high level.

REFERENCES:
patent: 3494698 (1970-02-01), Neumann
patent: 3572382 (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), Mottiev
patent: 3762215 (1973-10-01), Aleksoff
Green, P. S. , (Ed.), Acoustical Holography, vol. 5, pp. 41-45, Plenum Press.
Collier et al., Optical Holography, pp. 418-425, 437-438, Academic Press, 1971.
Ross, M. (Ed.), Laser Applications, vol. 1, pp. 42-49, Academic Press, 1971.

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