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US 5,182,180 AGranted
Dry film process for altering the wavelength of response of holograms
AssigneeE. I. Du Pont de Nemours and Company
InventorsWilliam J. Gambogi, Jr., Robert G. Melega
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Abstract
The process is disclosed for altering the wavelength response of a volume phase reflection hologram by contacting the hologram with a diffusion element containing a monomer. Monomer in the diffusion element is partially polymerized to effect a desired diffusion pattern.
Claims11
A process for forming a multicolor volume phase hologram in a substantially solid, transparent, photosensitive film element comprising:
- (a) holographically exposing said film element to coherent light to record a volume hologram within said element;
- (b) imagewise exposing a solid diffusing element containing monomer to actinic radiation to partially polymerize said monomer;
- (c) contacting said film element with said diffusion element for at time sufficient to selectively modify the wavelength of light response by the hologram by the diffusion of monomer from said diffusion element, thereby forming a multicolor hologram, and
- (d) polymerizing the monomer that has diffused into said film element during step (c).
1 more element
Dependencies are inferred from the claim text.