Process for forming a polymerized material and presenting holographic images
AssigneeHughes Aircraft Company
InventorLeroy J. Miller
Life of this patent
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Abstract
A photopolymerizable composition includes a water-insoluble olefinic compound that is polymerizable with free-radical initiators, an oil-soluble phenothiazine dye that is soluble in water-immiscible organic solvents, and a 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. The reducing agent and the dye are reacted together under the influence of light, and particularly red light. The resulting reactive free radicals cause the olefinic compound to polymerize to a polymer that is substantially unaffected by the presence of moisture.
Claims4
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.
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.
Dependencies are inferred from the claim text.