公开(公告)号：US20240385444A1

公开(公告)日：2024-11-21

申请号：US18684806

申请日：2022-08-10

Applicant: GOOGLE LLC

Inventor： Eliezer Glik ,  Ruoping Li ,  Ido Raveh

IPC: G02B27/01 ,  F21V8/00

Abstract: A virtual image is displayed to a user via a light engine (211) to generate a display light representing the virtual image, a diffractive waveguide (235), and an incoupler (231) and outcoupler (234) that are each optically coupled to the diffractive waveguide (235). In operation, the incoupler (231) receives the display light from the light engine (211) and directs the received display light into the diffractive waveguide (235) and to one or more multidimensional intermediate gratings (232. 233). The multidimensional intermediate gratings (232, 233) redirect the display light through the diffractive waveguide (235) to the outcoupler (234), which in turn redirects at least a portion of the display light out of the diffractive waveguide (235) to an eye (291, 293) of the user.