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US 12,399,320 B2Granted
Method and system for variable optical thickness waveguides for augmented reality devices
AssigneeMagic Leap, Inc.
InventorsRobert D. Tekolste, Ryan Jason Ong, Victor Kai Liu, Samarth Bhargava, Christophe Peroz, Vikramjit Singh, Marlon Edward Menezes, Shuqiang Yang, Frank Y. Xu
Life of this patent
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Abstract
An augmented reality device includes a projector, projector optics optically coupled to the projector, and an eyepiece optically coupled to the projector optics. The eyepiece includes an eyepiece waveguide characterized by lateral dimensions and an optical path length difference as a function of one or more of the lateral dimensions.
Claims44
An augmented reality device comprising:
- a projector;
- projector optics optically coupled to the projector;
- and
- an eyepiece optically coupled to the projector optics, wherein the eyepiece comprises an eyepiece waveguide including a uniform thickness portion, a tapered portion, a thinner portion, a diffractive incoupling element, and a diffractive outcoupling element, wherein the eyepiece waveguide is characterized by lateral dimensions and an eyepiece waveguide optical thickness that decreases from the uniform thickness portion of the eyepiece waveguide to the thinner portion of the eyepiece waveguide as a function of one or more of the lateral dimensions, wherein the diffractive incoupling element is located adjacent the uniform thickness portion of the eyepiece waveguide and the diffractive outcoupling element is located at the thinner portion of the eyepiece waveguide.
1 more element
An augmented reality device comprising:
- a projector;
- projector optics optically coupled to the projector;
- and
- an eyepiece optically coupled to the projector optics, wherein the eyepiece comprises an eyepiece waveguide characterized by lateral dimensions and one or more layers, wherein at least one of the one or more layers includes a uniform thickness portion, a tapered portion, a thinner portion, a diffractive incoupling element, and a diffractive outcoupling element, wherein the eyepiece waveguide is characterized by an eyepiece waveguide optical thickness that varies decreases from the uniform thickness portion of the eyepiece waveguide to the thinner portion of the eyepiece waveguide as a function of one or more of the lateral dimensions, wherein the diffractive incoupling element is adjacent the uniform thickness portion of the eyepiece waveguide and the diffractive outcoupling element is at the thinner portion of the eyepiece waveguide.
1 more element
An augmented reality device comprising:
- a projector;
- projector optics optically coupled to the projector;
- and
- an eyepiece waveguide optically coupled to the projector optics and including:
- an incoupling element;
- and
- an outcoupling element, wherein:
- the eyepiece waveguide is:
- characterized by lateral dimensions;
- configured to propagate light by total internal reflection (TIR) in a TIR region positioned between the incoupling element and the outcoupling element;
- and
- has an optical thickness that decreases continuously from the incoupling element, over an entirety of the TIR region, to the outcoupling element, as a function of one or more of the lateral dimensions.
9 more elements
An augmented reality device comprising:
- a projector;
- projector optics optically coupled to the projector;
- and
- an eyepiece optically coupled to the projector optics, wherein the eyepiece comprises an eyepiece waveguide including an incoupling element and an outcoupling element and characterized by lateral dimensions and an eyepiece waveguide optical thickness that varies from a thicker portion of the eyepiece waveguide to a thinner portion of the eyepiece waveguide as a function of one or more of the lateral dimensions, wherein the incoupling element is located at a tapered portion of the eyepiece waveguide disposed between the thicker portion and the thinner portion and the outcoupling element is located at the thinner portion of the eyepiece waveguide.
1 more element
Dependencies are inferred from the claim text.