Composite lightguides for augmented reality
AssigneeCorning Incorporated
InventorMark Francis Krol
Life of this patent
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Abstract
Various examples are provided related to composite lightguides which can be used for augmented reality and other augmented display applications. In one example, a composite lightguide includes a support substrate including a surface and a lightguide layer disposed on the surface of the support substrate. The lightguide layer can have a density that is greater than the density of the support substrate. For example, the density of the lightguide layer can be greater than twice the density of the support substrate. The lightguide layer can have a thickness that is about 25% or less than the thickness of the support substrate.
Claims20
A composite lightguide, comprising:
- a support substrate comprising a surface;
- and
- a lightguide layer disposed on the surface of the support substrate, the lightguide layer comprising an entrance grating and an exit grating, the lightguide layer having a refractive index nd greater than 1.60;
- wherein a ratio of a density of the lightguide layer to a density of the support substrate is greater than 1.40 and a ratio of a thickness of the lightguide layer to a thickness of the support substrate is less than 0.50.
Dependencies are inferred from the claim text.