Patent ID: 11966046
Assignee: ENVISICS LTD
Field: Optics (Instruments)
Classification: CPC G | IPC F  G

Claim 13:
14. A system comprising a waveguide, wherein the waveguide comprises:
a pair of opposing surfaces arranged to guide a light field therebetween by internal reflection;
an input port arranged to receive light from a display system;
a reflective element arranged to internally reflect the light field, wherein the input port and reflective element are formed on a second surface of the pair of opposing surfaces;
and
an output port formed by a transmissive-reflective element configured to divide the light field at each internal reflection therefrom such that a plurality of replicas of the light field are transmitted out of the waveguide through the output port, wherein the reflective element comprises a metal layer disposed on the second surface of the waveguide and a dielectric stack at least partially disposed on the metal layer to form a step, in which the metal layer forms an edge with the input port and the dielectric stack is offset with respect to the edge in a direction away from the input port, and wherein the waveguide comprises a first one-dimensional pupil expander of a pair of waveguide pupil expanders arranged to expand the pupil of the display system in a first direction and second, perpendicular direction, respectively.