US5095375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Holographic combiner edge seal design and composition
Assignee: Raytheon Co
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Filing: 1991-03-29
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Granted: 1992-03-10
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Expires: 2011-03-29
Abstract
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.
Inventors
- 👤 L. Gordon Bolt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:28
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/01; G02B27/0101; G02B27/0103; G03; G03H; G03H1/00; G03H1/02; G03H2250/00; G03H2250/37
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
73 words
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.
Claim 2
Dependent Claim
73 words
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.
Claim 3
Dependent Claim
13 words
The hologram combiner of claim 1 wherein the adhesive comprises a thermoset adhesive.
Claim 4
Dependent Claim
18 words
The hologram combiner of claim 2 wherein the thermoset adhesive has been filled with a water absorbing material.
Claim 5
Dependent Claim
14 words
The hologram combiner of claim 3 wherein the water absorbing material comprises calcium oxide.
Claim 6
Dependent Claim
14 words
The hologram combiner of claim 1 wherein the molecular sieve material comprises crystalline aluminosilicate.
Claim 7
Dependent Claim
15 words
The hologram combiner of claim 1 wherein the molecular sieve material comprises a zeolite material.
Claim 8
Dependent Claim
13 words
The hologram combiner of claim 1 wherein the film comprises an Aclar film.
Claim 9
Dependent Claim
25 words
The hologram combiner of claim 7 wherein the Aclar film has been corona discharge treated to provide for greater bond strength to the epoxy adhesives.
Claim 10
Dependent Claim
13 words
The hologram combiner of claim 1 wherein the film comprises an aluminum foil.
Claim 11
Independent Claim
86 words
A method of making a water resistant hologram combiner that comprises the steps of: 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.
Claim 12
Independent Claim
86 words
A method of making a water resistant hologram combiner that comprises the steps of: 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.
Claim 13
Dependent Claim
31 words
The method of claim 10 wherein the step of adhering a low moisture vapor transmission rate film to the hologram comprises the step of adhering an Aclar film to the hologram.
Claim 14
Dependent Claim
24 words
The method of claim 11 wherein the Aclar film has been treated by corona discharge to provide for greater bond strength to the adhesive.
Claim 15
Dependent Claim
37 words
The method of claim 10 wherein the step of adhering a low moisture vapor transmission rate film to the hologram comprises the step of adhering a metal foil to the coextensive edges of the hologram and substrate.
Claim 16
Dependent Claim
15 words
The method of claim 10 wherein the adhesive is filled with a water absorbing material.
Claim 17
Dependent Claim
13 words
The method of claim 14 wherein the molecular sieve material comprises crystalline aluminosilicate.
Claim 18
Dependent Claim
13 words
The method of claim 14 wherein the molecular sieve material comprises zeolite material.
Claim 19
Dependent Claim
13 words
The method of claim 14 wherein the water absorbing material comprises calcium oxide.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-03-10 | 1995-09-09 | 1996-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-10 | 1999-09-09 | 2000-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-10 | 2003-09-09 | 2004-03-10 | $7700.00 | Window Closed / Lapsed |