SUBSTRATE-GUIDE OPTICAL DEVICE

摘要

An optical device, including a light waves-transmitting substrate has two major surfaces and edges, optical means for coupling light into the substrate by total internal reflection, and a plurality of partially reflecting surfaces (22a, 22b) carried by the substrate. The partially reflecting surfaces (22a, 22b) are parallel to each other and are not parallel to any of the edges of the substrate, one or more of the partially reflecting surfaces (22a, 22b) being an anisotropic surface. The optical device has dual operational modes in see-through configuration. In a first mode, light waves are projected from a display source through the substrate to an eye of a viewer. In a second mode, the display source is shut off and only an external scene is viewable through the substrate.

主权项

1. An optical system, comprising:
a light waves-transmitting substrate having at least two major surfaces and edges; first and second electronic display sources; an optical device for coupling light waves from the first electronic display source into the substrate by total internal reflection to form an electronic display; and a plurality of partially reflecting surfaces carried by the substrate, the partially reflecting surfaces being parallel to each other and not parallel to any of the edges of the substrate; characterized in that the optical system allows dual operational modes in see-through configuration of an external scene, allowing a viewer to see the electronic display or only an external scene, wherein in a first mode, image light waves projected from the first electronic display source are coupled into the substrate and projected into an eye of a viewer by the partially reflecting surfaces, and in a second mode, the electronic display is shut-off and the external scene is directly viewable through the substrate and wherein an image from the external scene transmitted through the substrate emerges from the second electronic display source.