Moisture-insensitive holograms and method for making the same
OwnerJonathan R. Bilesinventor
Life of this patent
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Abstract
Reflection holograms to be viewed through the front side of a transparent and preferably flexible substrate, and which are insensitive to moisture in liquid and in vapor form, are produced by attaching a layer of holographic recording material to the back side of a transparent substrate, attaching a layer of moisture barrier resin to the back side of the recording material in sufficient thickness to render the hologram insensitive to moisture, and attaching a layer of opaque material to the back side of the moisture barrier layer. Further protection against moisture may be achieved by attaching a solvent deposited layer of transparent moisture barrier resin to the front side of the substrate and/or attaching a layer of moisture barrier sheet to the back side of the opaque layer.
Claims7
A liquid water and water vapor insensitive reflection holographic article to be viewed through the front side of its transparent substrate, the article comprising:
- a) a transparent substrate having front and back sides,
- b) a layer of image developed, dry holographic recording material, whose image is capable of being destroyed by liquid water and water vapor, attached to the back side of the substrate,
- c) a film or organic polymer liquid water and water vapor barrier attached to the back side of the recording material, and
- d) an opaque layer attached to the back side of the organic polymer barrier.
A process for making a liquid water and water vapor insensitive reflection holographic article to be viewed through the front side of a transparent substrate having front and back sides, the process comprising:
- a) coating the back side of a transparent substrate with a holographic recording material,
- b) drying the holographic recording material,
- c) exposing the holographic recording material,
- d) developing the holographic recording material,
- e) drying the developed holographic recording material,
- f) coating the back side of the developed, dry holographic recording material with one or more layers of an organic polymer liquid water and water vapor barrier material,
- g) drying the barrier layer,
- h) coating the back side of the dry barrier layer with an opaque layer, and
- i) drying the opaque layer.
Dependencies are inferred from the claim text.