Method and Apparatus for Providing a Polarization Selective Holographic Waveguide Device
AssigneeDigiLens Inc.
InventorsMilan Momcilo Popovich, Jonathan David Waldern, Alastair John Grant
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Abstract
A waveguide apparatus, comprises: disposed in at least one layer: an input coupler; a first fold grating; a second fold grating; an output coupler; and a source of light optically coupled to the waveguide providing at least first and second polarizations of the light and at least one wavelength. The input coupler is configured to cause the first polarization light to travel along a first total internal reflection (TIR) path and the second polarization light to travel along a second TIR path.
Claims30
A waveguide apparatus, comprising:
- an input coupler comprising a first linear slant grating and a second linear slant grating configured such that the first linear slant grating and the second linear slant grating form overlapping crossed slant gratings;
- an output coupler;
- and
- a source of light optically coupled to a waveguide providing at least first and second polarizations of light in at least one wavelength,
- wherein said input coupler is configured to cause said first polarization light to travel along a first total internal reflection (TIR) path and said second polarization light to travel along a second TIR path,
- wherein said first TIR path and said second TIR path diverge from said input coupler, and
- wherein the first linear slant grating is configured to only diffract the first polarization light and the second linear slant grating is configured to only diffract the second polarization light.
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A waveguide apparatus, comprising:
- an input coupler;
- an output coupler comprising a first linear slant grating and a second linear slant grating configured such that the first linear slant grating and the second linear slant grating form overlapping crossed slant gratings;
- a source of light optically coupled to a waveguide providing at least first and second polarizations of light in at least one wavelength,
- wherein said output coupler outputs said first polarization light traveling along a first total internal reflection (TIR) path and said second polarization light traveling along a second TIR path,
- wherein the first TIR path and second TIR path converge on said output coupler, and
- wherein the first linear slant grating is configured to only diffract the first polarization light and the second linear slant grating is configured to only diffract the second polarization light.
Dependencies are inferred from the claim text.