Moisture-insensitive holograms and method for making the same

Details Moisture-insensitive holograms and method for making the same Moisture-insensitive holograms and method for making the same

1991-05-20

1994-07-19

Lerner, Martin

Optical: systems and elements

Holographic system or element

Having particular recording medium

359 1, 359507, 359513, 430 1, G03H 102, G03H 104

Patent

active

053314441

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.

REFERENCES:
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patent: 4269473 (1981-05-01), Flothmann et al.
patent: 4318970 (1982-03-01), Kurland et al.
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patent: 4530564 (1985-07-01), Close
patent: 4789211 (1988-12-01), Wreede
patent: 4956040 (1990-09-01), Fry
patent: 5073222 (1991-12-01), Fry

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