WAVEGUIDES WITH IMPROVED INTENSITY DISTRIBUTIONS
First Claim
1. A near-eye or heads-up display system, comprising:
- an optical waveguide including an input-coupler, an intermediate-component and an output-coupler; and
a display engine configured to produce an image and to direct light corresponding to the image towards the input-coupler of the optical waveguide;
the input-coupler configured to couple light corresponding to the image, that is incident on the input-coupler, into the optical waveguide and towards the intermediate-component;
the intermediate-component configured to perform pupil expansion and direct the light corresponding to the image towards the output-coupler;
the output-coupler configured to couple, out of the optical waveguide, the light corresponding to the image that travels in the optical waveguide from the input-coupler to the output-coupler via the intermediate-component by way of total internal reflection (TIR); and
the intermediate-component comprising a Bragg polarization grating.
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Accused Products
Abstract
An optical waveguide, for use a near-eye or heads-up display system, includes an input-coupler, an intermediate-component and an output-coupler. The input-coupler is configured to couple light corresponding to an image that is incident on the input-coupler, into the optical waveguide and towards the intermediate-component. The intermediate-component can be implemented as a Bragg polarization grating that comprises a stack of birefringent layers configured to diffract the light corresponding to the image that is incident thereon into a zero-order beam having one of right handed circular polarization or left handed circular polarization, and a first-order beam having the other one of right handed circular polarization or left handed circular polarization. The output-coupler is configured to couple, out of the optical waveguide, the light corresponding to the image that travels in the optical waveguide from the input-coupler to the output-coupler via the intermediate-component by way of total internal reflection (TIR).
24 Citations
20 Claims
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1. A near-eye or heads-up display system, comprising:
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an optical waveguide including an input-coupler, an intermediate-component and an output-coupler; and a display engine configured to produce an image and to direct light corresponding to the image towards the input-coupler of the optical waveguide; the input-coupler configured to couple light corresponding to the image, that is incident on the input-coupler, into the optical waveguide and towards the intermediate-component; the intermediate-component configured to perform pupil expansion and direct the light corresponding to the image towards the output-coupler; the output-coupler configured to couple, out of the optical waveguide, the light corresponding to the image that travels in the optical waveguide from the input-coupler to the output-coupler via the intermediate-component by way of total internal reflection (TIR); and the intermediate-component comprising a Bragg polarization grating. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An optical waveguide, comprising:
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an input-coupler; an intermediate-component; and an output-coupler; the input-coupler configured to couple light corresponding to an image, that is incident on the input-coupler, into the optical waveguide and towards the intermediate-component; the intermediate-component comprising a stack of birefringent layers that is configured to diffract the light corresponding to the image that is incident thereon into a zero-order beam having one of right handed circular polarization or left handed circular polarization, and a first-order beam having the other one of right handed circular polarization or left handed circular polarization; and the output-coupler configured to couple, out of the optical waveguide, the light corresponding to the image that travels in the optical waveguide from the input-coupler to the output-coupler via the intermediate-component by way of total internal reflection (TIR). - View Dependent Claims (13, 14, 15)
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16. A method for use with a near-eye or heads-up display system, comprising:
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producing light corresponding to an image; coupling the light corresponding to the image into an optical waveguide; after the light corresponding to the image has been coupled into the optical waveguide, and has traveled within at least a portion of the optical waveguide by way of total internal reflection (TIR), diffracting the light corresponding to the image into a zero-order beam having one of right handed circular polarization or left handed circular polarization, and a first-order beam having the other one of right handed circular polarization or left handed circular polarization; after the light corresponding to the image has been diffracted into the zero-order beam having the one of right handed circular polarization or left handed circular polarization, and the first-order beam having the other one of right handed circular polarization or left handed circular polarization, coupling at least a portion of the light corresponding to the image out of the optical waveguide. - View Dependent Claims (17, 18, 19, 20)
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Specification