Patent ID: 11947123
Assignee: OORYM OPTICS LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G | IPC F  G

Claim 0:
1. An optical device, comprising:
a light-transmitting substrate having at least two major surfaces, edges and an output aperture;
an optical element for coupling light waves into the substrate to effect total internal reflection, and
at least one optical surface having at least a first and a second side, located between the two major surfaces of the light-transmitting substrate for coupling light waves out of the substrate,
wherein light waves trapped inside the substrate impinge on the first side of the optical surface, having incident angles confined in at least a first and a second distinct angular spectrum before being coupled out from the substrate through the output aperture;
the light waves having incident angles in the first angular spectrum are totally reflected from the optical surface, and the light waves having incident angles in the second angular spectrum are substantially partially reflected from the optical surface and substantially partially transmitted through the optical surface.