Claims
- 1. A process for producing and replaying holographic images, comprising the steps of:
- furnishing a sheet of a photopolymerizable composition comprising
- a water insoluble, photopolymerizable olefinic compound that is polymerizable with free radical initiators,
- an oil soluble phenothiazine dye that is soluble in water-immiscible organic solvents, and
- an oil soluble reducing agent operable to react with the dye to form reactive free radicals only when the dye is in an excited state induced by exposure to light;
- directing two coherent beams of visible light toward the sheet of the photopolymerizable composition to polymerize the composition to expose a holographic image into the sheet;
- developing the holographic image; and
- projecting the image by directing coherent visible light through the sheet of the polymerized composition.
- 2. The process of claim 1 wherein the step of developing the image comprises placing the composition first in a solvent for the unpolymerized monomer and then in a nonsolvent for the unpolymerized monomer.
- 3. A process for producing holographic images, comprising the steps of:
- furnishing a sheet of a photopolymerizable composition comprising
- a water insoluble, photopolymerizable olefinic compound that is polymerizable with free radical initiators,
- an oil soluble phenothiazine dye that is soluble in water-immiscible organic solvents, and
- an oil soluble reducing agent operable to react with the dye to form reactive free radicals only when the dye is in an excited state induced by exposure to light;
- directing two coherent beams of visible light toward the sheet of the photopolymerizable composition to polymerize the composition to expose a holographic image into the sheet and
- developing the holographic image.
- 4. A holographic product made by the process of claim 3.
Parent Case Info
This is a division of application Ser. No. 07/521,853 filed May 10, 1990, U.S. Pat. No. 5,250,391.
US Referenced Citations (15)
Non-Patent Literature Citations (3)
Entry |
The Condensed Chemical Dictionary, Tenth Edition, p. 677. |
The Merck Index, An Encyclopedia of Chemicals, Drugs, and Biologicals, Tenth Edition, 1983, pp. 2104, 2117, and 9354. |
The Merck Index .COPYRGT. 1983 10th ed. pp. 1045-1046. |
Divisions (1)
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Number |
Date |
Country |
Parent |
521853 |
May 1990 |
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