公开(公告)号：US20240393517A1

公开(公告)日：2024-11-28

申请号：US18674737

申请日：2024-05-24

Applicant: Meta Materials Inc.

Inventor： Ehsan Alimohammadian ,  Milad Khoshnegar Shahrestani

IPC: F21V8/00

Abstract: A display and waveguide system includes an in-coupler, an out-coupler, a light engine, and a waveguide core. The in-coupler is a combination of a refractive element (for example, an angled microfacet) and a diffractive element (for example, a grating). This microfacet, which uses refraction to change the light direction, is combined with the grating, which uses diffraction to change the light direction, for a combination that enables a large steering angle with high-efficiency coupling. The in-coupler structure in one example includes a layer of dielectric material, into which the refractive and diffractive elements are embossed using a nanoimprinting stamp. The embossed dielectric surface can be covered with a protective layer of protective material.