Method for holographic mastering and replication
First Claim
1. A method for mastering and replicating holograms, the method comprising:
- a) providing N substrates each containing a first hologram for diffracting incident light from a first direction into diffracted light in a second direction;
providing a second holographic recording medium; and
providing a third holographic recording medium;
b) stacking in sequence the first holograms 1-N onto said second holographic recording medium;
c) illuminating an external surface of said first holograms 1-N with light of a first polarization in a first direction;
d) said first holograms 1-N diffracting said light into zero order light in said first direction and diffracted light in said second direction;
e) said first direction light and said second direction light interfering in said second holographic recording medium to form a second hologram;
f) placing said second hologram in contact with said third holographic recording medium;
g) illuminating external surface of said second hologram with light in said first direction;
h) said second hologram diffracting said light into zero order light in said first direction and diffracted light in said second direction; and
i) said diffracted and zero order light interfering in said third holographic recording medium to form a third hologram.
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Accused Products
Abstract
A method for producing holograms with a multiplicity of holographic prescriptions from a single master is provided. A multiplicity of holographic substrates each having 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.
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Citations
20 Claims
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1. A method for mastering and replicating holograms, the method comprising:
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a) providing N substrates each containing a first hologram for diffracting incident light from a first direction into diffracted light in a second direction;
providing a second holographic recording medium; and
providing a third holographic recording medium;b) stacking in sequence the first holograms 1-N onto said second holographic recording medium; c) illuminating an external surface of said first holograms 1-N with light of a first polarization in a first direction; d) said first holograms 1-N diffracting said light into zero order light in said first direction and diffracted light in said second direction; e) said first direction light and said second direction light interfering in said second holographic recording medium to form a second hologram; f) placing said second hologram in contact with said third holographic recording medium; g) illuminating external surface of said second hologram with light in said first direction; h) said second hologram diffracting said light into zero order light in said first direction and diffracted light in said second direction; and i) said diffracted and zero order light interfering in said third holographic recording medium to form a third hologram. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of mastering and replicating holograms, the method comprising:
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a) providing a laser apparatus for forming a first recording beam in a first direction and a second recording beams in a second direction;
N substrates each containing a first HPDLC mixture;
a holography photopolymer;
a copy holographic substrate containing a second HPDLC mixture;
a HWP; and
a linear polarizer;b) said first and second beams interfering within each said first HPDLC mixture to form a first hologram in each said substrate; c) stacking in sequence the linear polarizer, HWP and first holograms 1-N onto a second holographic photopolymer; d) illuminating external surface of said holograms 1-N with light of a first polarization in said first direction; e) said first holograms 1-N diffracting said light into zero order light in said first direction and diffracted light in said second direction; f) said HWF rotating the incident light polarization through ninety degrees into a second polarization; g) said polarizer removing residual first polarization light; h) said first direction light and said second direction light interfering in said holographic photopolymer to form a second hologram; i) placing said second hologram in contact with said copy holographic substrate; j) illuminating external surface of said second hologram with light of said second polarization in said first direction; k) said second hologram diffracting said light into zero order light in said first direction and diffracted light in said second direction; and l) said diffracted and first order interfering in said copy holographic substrate to form a third hologram. - View Dependent Claims (19, 20)
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Specification