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US 12,535,671 B2Granted
Optical eyepiece using single-sided patterning of grating couplers
AssigneeMagic Leap, Inc.
InventorsKang Luo, Vikramjit Singh, Nai-Wen Pi, Shuqiang Yang, Frank Y. Xu
Life of this patent
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Abstract
An eyepiece includes a substrate and an in-coupling grating patterned on a single side of the substrate. A first grating coupler is patterned on the single side of the substrate and has a first grating pattern. The first grating coupler is optically coupled to the in-coupling grating. A second grating coupler is patterned on the single side of the substrate adjacent to the first grating coupler. The second grating coupler has a second grating pattern different from the first grating pattern. The second grating coupler is optically coupled to the in-coupling grating.
Claims37
An eyepiece comprising:
- a substrate;
- an in-coupling grating imprinted on a single side of the substrate;
- and
- a grating coupler imprinted on the single side of the substrate and optically coupled to the in-coupling grating, wherein the grating coupler comprises a plurality of tiles defining an exit pupil expander (EPE) of the eyepiece,
- wherein each tile of the plurality of tiles comprises a plurality of protrusions.
2 more elements
An eyepiece comprising:
- a substrate;
- an in-coupling grating imprinted on a single side of the substrate;
- and
- a grating coupler imprinted on the single side of the substrate and optically coupled to the in-coupling grating, wherein the grating coupler comprises a plurality of tiles defining an exit pupil expander (EPE) of the eyepiece,
- wherein each tile of the plurality of tiles comprises a plurality of cuboids.
2 more elements
An eyepiece comprising:
- a substrate;
- an in-coupling grating imprinted on a single side of the substrate;
- and
- a grating coupler imprinted on the single side of the substrate and optically coupled to the in-coupling grating, wherein the grating coupler comprises a plurality of tiles defining an exit pupil expander (EPE) of the eyepiece,
- wherein the grating coupler is configured to receive light diffracted by the in-coupling grating and diffuse light emitted by a center region of the grating coupler.
2 more elements
An eyepiece comprising:
- a substrate;
- an in-coupling grating imprinted on a single side of the substrate;
- and
- a grating coupler imprinted on the single side of the substrate and optically coupled to the in-coupling grating, wherein the grating coupler comprises a plurality of tiles defining an exit pupil expander (EPE) of the eyepiece,
- wherein the grating coupler is configured to receive light diffracted by the in-coupling grating and diffuse light emitted by a center region of the grating coupler,
- wherein each tile of the plurality of tiles comprises a first grating pattern, wherein a grating region is interspersed among the plurality of tiles, and comprises a second grating pattern that is different from the first grating pattern,
- wherein the in-coupling grating comprises a first set of parallel ridges, and the grating region comprises a second set of parallel ridges orthogonal to the first set of parallel ridges.
4 more elements
An eyepiece comprising:
- a substrate;
- an in-coupling grating imprinted on a single side of the substrate;
- and
- a grating coupler imprinted on the single side of the substrate and optically coupled to the in-coupling grating, wherein the grating coupler comprises a plurality of tiles defining an exit pupil expander (EPE) of the eyepiece,
- wherein an area of each tile of the plurality of tiles decreases as a position of the tile changes from a center of the grating coupler to a boundary of the grating coupler.
2 more elements
An eyepiece comprising:
- a substrate;
- an in-coupling grating imprinted on a single side of the substrate;
- and
- a grating coupler imprinted on the single side of the substrate and optically coupled to the in-coupling grating, wherein the grating coupler comprises a plurality of tiles defining an exit pupil expander (EPE) of the eyepiece,
- wherein an area of each tile of the plurality of tiles increases as a position of the tile changes from a first boundary of the grating coupler to a second boundary of the grating coupler.
2 more elements
An eyepiece comprising:
- a substrate;
- an in-coupling grating imprinted on a single side of the substrate;
- and
- a grating coupler imprinted on the single side of the substrate and optically coupled to the in-coupling grating, wherein the grating coupler comprises a plurality of tiles defining an exit pupil expander (EPE) of the eyepiece,
- wherein each tile of the plurality of tiles comprises a plurality of recesses.
2 more elements
Dependencies are inferred from the claim text.