Process for fabricating stable holograms

Radiation imagery chemistry: process – composition – or product th – Holographic process – composition – or product

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350 36, 350 361, 430 2, 430 14, 430 17, 430 18, 430523, 430533, 430961, G03C 524, G03C 526

Patent

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043294090

ABSTRACT:
An improved method for fabricating a light weight dichromated gelatin hologram package on plastic or glass substrates is provided. The prior art cover plate protecting the gelatin layer is eliminated by depositing on the gelatin a material providing a barrier to atmospheric moisture and possessing abrasion-resistant properties. In one embodiment, the photosensitive gelatin layer is deposited on a plastic substrate employing at least one subbing layer which provides a barrier to atmospheric moisture. Protection of the gelatin layer is provided by a plasma deposited silicon nitride film thereon.

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Holographic Optical Element for Visual Display Applications, D. E. McCauley, C. E. Simpson, W. J. Murbach, pp. 232-242.

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