公开(公告)号：US20240036257A1

公开(公告)日：2024-02-01

申请号：US18256608

申请日：2021-12-07

Applicant: Snap Inc.

Inventor： Roland Piper ,  Arseny Alexeev

IPC: G02B6/26 ,  G02B27/00 ,  G02B27/01

CPC classification number: G02B6/262 ,  G02B27/0081 ,  G02B27/0172 ,  G02B2027/0178

Abstract: An optical device for an augmented reality or virtual reality display. A first input diffractive optical element is arranged on a waveguide to receive light from a projector, couple a first portion of the light into the waveguide along a first path, and allow a second portion of the light to pass through. A second input diffractive optical element is arranged to receive the second portion of the light and couple a third portion of the received light along a second path. An output diffractive optical element receives light along the first and second paths and couples the received light out of the waveguide towards a viewer at a first pattern of positions for light along the first path and at a second pattern of positions for light along the second path, providing a first and second plurality of exit pupils corresponding to the first and second pattern of positions.