Holographic combiner edge seal design and composition
First Claim
1. A hologram combiner comprising:
- a plurality of substrates, each having two surfaces and an edge;
a hologram disposed between adjacent surfaces of the substrates and having an edge coextensive with the edges of the substrates;
a adhesive disposed on the edge of the hologram having a molecular sieve material disposed therein; and
a low moisture vapor transmission rate film adhered to the edges of the hologram and substrates by means of the adhesive.
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Accused Products
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.
52 Citations
17 Claims
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1. A hologram combiner comprising:
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a plurality of substrates, each having two surfaces and an edge; a hologram disposed between adjacent surfaces of the substrates and having an edge coextensive with the edges of the substrates; a adhesive disposed on the edge of the hologram having a molecular sieve material disposed therein; and a low moisture vapor transmission rate film adhered to the edges of the hologram and substrates by means of the adhesive. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of making a water resistant hologram combiner that comprises the steps of:
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providing a plurality of substrates, each having two surfaces and an edge; disposing a hologram between adjacent surfaces of the substrates such that its edge is coextensive with the edges of the substrates; disposing a adhesive on the edge of the hologram that has a molecular sieve material disposed therein; adhering a low moisture vapor transmission rate film to the coextensive edges of the hologram and substrates by means of the adhesive. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification