Patent ID: 9019615
Filing Date: 2015-04-28
Classification: G02B

Abstract:
1. A virtual image projector comprising: a rod light guide embossed with at least a first diffraction grating and a second diffraction grating that is substantially parallel to the first diffraction grating on a first surface of the rod light guide, the first diffraction grating configured to receive first light rays from an illuminator and to project first diffracted light rays from the rod light guide at a first range of angles, and the second diffraction grating configured to receive second light rays from the illuminator and to project second diffracted light rays from the rod light guide at a second range of angles; and a slab light guide configured to receive the first diffracted light rays and the second diffracted light rays, and to project the first diffracted light rays and the second diffracted light rays out of the slab light guide to generate a virtual image with a wide field-of-view.