Hologram stabilizing assembly and method
AssigneeHughes Aircraft Company
InventorJohn E. Wreede
Life of this patent
Estimating the term…
Abstract
The holograph assembly has first and second hydrophobic substrates layers (14, 12) which carry therebetween a water absorbent layer (16). The holographic image layer (18) is protected against moisture from that side because the water absorbent layer acts as a sponge for the moisture diffusing through the first substrate (14). The upper side of the image layer is protected by first and second cover layers (20, 22) and second water absorbent cover layer (24), all of which must be transparent to view the holographic image. An adhesive may be applied between layers.
Claims20
A pre-holographic assembly comprising:
- a first hydrophobic substrate layer;
- a water absorbent layer positioned on said first hydrophobic substrate layer;
- a second hydrophobic substrate layer positioned on said water absorbent layer;
- and
- a photosensitive holographic emulsion layer positioned on said second hydrophobic substrate layer so that said photosensitive holographic emulsion layer can be exposed and developed to provide a hydrophobic image layer, said first and second substrate layers being sufficiently strong to support said emulsion layer.
A holographic assembly comprising:
- a first hydrophobic substrate layer;
- a water absorbent layer positioned on said first substrate;
- a second hydrophobic substrate layer positioned on said first water absorbent layer;
- a photosensitive holographic emulsion layer having a holographic image therein, said emulsion layer being hydrophilic;
- a first hydrophobic cover layer on said emulsion layer;
- a second water absorbent layer on said first hydrophobic cover layer;
- and
- a second hydrophobic cover on said second water absorbent layer, at least said first and second cover layers and said second water absorbent layer being transparent so that the holographic image on the emulsion layer can be viewed.
The method of fabricating a pre-holographic assembly comprising the steps of:
- providing a first hydrophobic substrate;
- depositing thereon a first water absorbent layer;
- depositing thereon a second hydrophobic substrate, with said first and second hydrophobic substrates being sufficiently strong to support the pre-holographic assembly;
- and
- depositing on the second hydrophobic substrate a photosensitive hydrophilic holographic layer.
Dependencies are inferred from the claim text.