Post-exposure dye treatment in the production of holograms
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United States of America Patent
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Oct 30, 1990
Grant Date -
N/A
app pub date -
Mar 22, 1989
filing date -
Mar 24, 1988
priority date (Note) -
Expired
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Abstract
A hologram which comprises a light transparent base having coated thereon a hydrophilic water-swellable layer which contains the holographic image and a dye whose peak absorption is below the peak replay wavelength of the hologram. The hologram is produced by adding the dye after exposure of the hologram.
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