Method for Holographic Mastering and Replication
AssigneeDigiLens Inc.
InventorsMilan Momcilo Popovich, Jonathan David Waldern, Alastair John Grant
Life of this patent
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Abstract
A method for producing holograms with a multiplicity of holographic prescriptions from a single master is provided. A multiplicity of holographic substrates each containing a first hologram is stacked on a second holographic recording medium substrate. The first hologram is designed to diffract light from a first direction into a second direction. When expose to illumination from the first direction zero order and diffracted light from each first hologram interfere in the second holographic recording medium substrate forming a second hologram. The second hologram is then copied into a third holographic recording medium substrate to provide the final copy hologram.
Claims20
A method for producing a pluarlity of holograms with a plurality of prescriptions from common master hologram, the method comprising:
- providing a master hologram configured to provide diffracted and zero-order beams angles for each of a plurality of incident beam directions;
- providing an intermediate holographic medium;
- providing a contact copy holographic medium;
- providing a light source to provide a plurality of incidence angles on said master hologram;
- illuminating said master hologram with a light of a first polarization in a first direction;
- diffracting said light into a zero order beam in said first direction and a diffracted beam in said second direction using said master hologram;
- interfering said zero order beam and said diffracted beam in said intermediate holographic medium to form an intermediate master hologram;
- placing said intermediate master hologram in contact with said contact copy holographic medium;
- further illuminating an external surface of said intermediate master hologram with a second light in said first direction, said intermediate master hologram diffracting said second light into a second zero order beam in said first direction and a second diffracted beam in said second direction, said second diffracted and second first order beams interfering in said contact copy holographic medium to form a contact copy hologram.
Dependencies are inferred from the claim text.