Compact head-mounted display system

Abstract

There is provided an optical device, including a light-transmitting substrate having at least two parallel major surfaces, edges and an output aperture, an optical element for coupling light waves into the substrate to effect total internal reflection, at least one first reflecting surface having at least one active side, located between the two major surfaces of the light-transmitting substrate for coupling light waves out of the substrate, and a partially reflecting element positioned outside of the substrate, wherein light waves coupled out from the substrate through the output aperture, are partially coupled back into the substrate by the partially reflecting element.

Dependencies are inferred from the claim text.