OPTICAL DEVICE FOR AUGMENTED REALITY OR VIRTUAL REALITY DISPLAY

Abstract

An optical device for use in an augmented reality or virtual reality display, comprising: a planar waveguide; an input diffractive optical element, DOE, configured to receive light from a projector and couple the light into the waveguide; the output DOE configured to receive light from the input diffractive optical element in an input direction, expand the light in two dimensions and couple the light out of the waveguide towards a user, the output DOE comprising a first diffractive region configured to diffract light within the waveguide, the first diffractive region having a first direction of periodicity and a second direction of periodicity , wherein an angle between the input direction and the first direction of periodicity is equal and opposite to an angle between the input direction and the second direction of periodicity, wherein the first diffractive region comprises an array of optical structures, wherein each optical structure is oriented in a third direction that is non-parallel to the first and second directions of periodicity, and is configured to couple light out of the waveguide towards the user.

Inventors

SOL, Christian
NOUMAN, Tayyab
PROCTER, Matthew

Assignees

SNAP INC

Dates

Publication Date: 20260506
Application Date: 20230608