Waveguide Comprising an Anisotropic Diffracting Layer
First Claim
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1. Edge-lit slab waveguide equipped with a slanted anisotropic holographic layer which couples out linearly polarized light.
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Abstract
The invention relates to an edge-lit slab waveguide equipped with a slanted anisotropic holographic layer, which couples out linearly polarized light. The invention further relates a new slanted anisotropic holographic layer suitable for use on the waveguide according to the invention, to a method to prepare such layer, and devices comprising the waveguide according to the invention.
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Citations
30 Claims
- 1. Edge-lit slab waveguide equipped with a slanted anisotropic holographic layer which couples out linearly polarized light.
- 6. Slanted anisotropic holographic layer based on photo-polymerizable material and at least one mesogen in which the mesogen is in an aligned state after polymerization.
- 11. Edge-lit slab waveguide equipped with a slanted anisotropic holographic layer which couples out linearly polarized light, wherein the layer is obtained by polymerization of a mixture of at least one reactive monomer and a mesogen, and wherein the mesogen is in an aligned state.
- 18. Method for producing a slanted anisotropic holographic layer, based on at least one reactive monomer and at least one reactive mesogen which are polymerized by use of different polymerization methods.
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26. Method for making a slanted anisotropic holographic layer comprising the steps of
a) providing a mixture of at least one reactive monomer and a reactive mesogen, b) making a layer of the mixture, c) applying UV radiation in order to at least partially polymerize the reactive monomer into a slanted transmission grating, d) applying a subsequent thermal or UV exposure to further polymerize the reactive mesogen and (optional) residual unreacted monomer.
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