Optical: systems and elements – Holographic system or element
Patent
1991-03-29
1992-03-10
Arnold, Bruce Y.
Optical: systems and elements
Holographic system or element
156107, 430 1, 430 2, G03H 102
Patent
active
050953753
ABSTRACT:
The present invention comprises hologram combiners that incorporate one of several compositions of material to seal their perimeters and prevent the hologram from being attacked by water. The design of the combiner edge seals are fabricated using a perimeter edge buildup technique. The invention is implemented by the use of a band of polymer film, or a metal film such as aluminum foil, for example, that is adhered to the edge of periphery of the combiner. Adhesion is achieved by the use of a adhesive material that has been filled with a water absorbing material comprising molecular sieves such as crystalline aluminosilicate, zeolites, or calcium oxide. Calculations and accelerated static testing have indicated that the present invention provides for a hologram combiner that meets the most stringent environmental requirements, and is suitable for substantially all applications in which it may be employed.
REFERENCES:
patent: 4329409 (1982-05-01), Wreede et al.
patent: 4330604 (1982-05-01), Wreede et al.
patent: 4789211 (1988-12-01), Wreede
patent: 4853306 (1989-08-01), Wreede et al.
patent: 4908285 (1990-03-01), Kushibiki et al.
Alkov Leonard A.
Arnold Bruce Y.
Denson-Low Wanda K.
Hughes Aircraft Company
Lerner Martin
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