Patent ID: 11902716
Assignee: LUMUS LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 2:
3. The optical system of claim 1, wherein the plurality of surfaces of the light-transmitting substrate further includes an edge non-parallel to the major external surfaces, and wherein the optical coupling-in configuration includes: a reflective surface deployed at the edge of the light-transmitting substrate, and an angular selective reflective surface deployed within the light-transmitting substrate obliquely to the major external surfaces of the light-transmitting substrate, the angular selective reflective surface configured to: transmit light that is incident to the angular selective reflective surface at a first range of incident angles such that the transmitted light is guided by internal reflection between the major external surfaces of the light-transmitting substrate, and reflect light that is incident to the angular selective reflective surface at a second range of incident angles.