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US 11,609,418 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.
Claims18
An eyepiece comprising:
- an in-coupling grating patterned on a single side of a substrate and configured to diffract light, received from a projector, into a first portion of the light and a second portion of the light,
- wherein the first portion has a first orientation with respect to the light received from the projector and the second portion has a second orientation with respect to the light received from the projector, and
- wherein the second orientation is different from the first orientation;
- and
- a diffraction grating patterned on the single side of the substrate and configured to:
- receive, from the in-coupling grating, the first portion of the light and the second portion of the light;
- diffract the first portion of the light and the second portion of the light;
- and
- combine the diffracted first portion of the light and the diffracted second portion of the light,
- wherein the diffraction grating comprises:
- a first grating coupler;
- and
- a second grating coupler,
- wherein the first grating coupler is configured to direct, to the second grating coupler, the diffracted first portion of the light, and
- wherein the second grating coupler is configured to direct, to the first grating coupler, the diffracted second portion of the light.
12 more elements
An eyepiece comprising:
- a substrate;
- an in-coupling grating patterned on a single side of the substrate and configured to diffract light, received from a projector, into a first portion of the light and a second portion of the light, wherein the first portion has a first orientation with respect to the light received from the projector and the second portion has a second orientation with respect to the light received from the projector, and wherein the second orientation is different from the first orientation;
- a first grating coupler patterned on the single side of the substrate and having a first grating pattern, wherein the first grating coupler is optically coupled to the in-coupling grating;
- and
- a second grating coupler patterned on the single side of the substrate and adjacent to the first grating coupler, the second grating coupler having a second grating pattern different from the first grating pattern, wherein the second grating coupler is optically coupled to the in-coupling grating,
- wherein the in-coupling grating is configured to direct the first portion of the light into the first grating coupler and the second portion of the light into the second grating coupler.
3 more elements
A method for manufacturing an eyepiece, the method comprising:
- providing a substrate;
- patterning an in-coupling grating on a single side of the substrate;
- and
- patterning a diffraction grating on the single side of the substrate, wherein patterning the diffraction grating comprises:
- patterning a first grating coupler on the single side of the substrate, the first grating coupler directly optically coupled to the in-coupling grating and having a first grating pattern;
- and
- patterning a second grating coupler on the single side of the substrate and adjacent to the first grating coupler, wherein the second grating coupler is directly optically coupled to the in-coupling grating and has a second grating pattern different from the first grating pattern,
- wherein the patterning of the first grating coupler comprises patterning a plurality of protrusions on the single side of the substrate, each protrusion of the plurality of protrusions having one or more sidewalls, and
- wherein each sidewall of the one or more sidewalls is oriented at a different angle to the substrate.
6 more elements
A method for manufacturing an eyepiece, the method comprising:
- providing a substrate;
- patterning an in-coupling grating on a single side of the substrate;
- and
- patterning a diffraction grating on the single side of the substrate, wherein patterning the diffraction grating comprises:
- patterning a first grating coupler on the single side of the substrate, the first grating coupler directly optically coupled to the in-coupling grating and having a first grating pattern;
- and
- patterning a second grating coupler on the single side of the substrate and adjacent to the first grating coupler,
- wherein the second grating coupler is directly optically coupled to the in-coupling grating and has a second grating pattern different from the first grating pattern, and
- wherein the patterning of the first grating coupler further comprises patterning at least two intersecting ridges oriented in two different directions for each protrusion of a plurality of protrusions.
6 more elements
Dependencies are inferred from the claim text.