| 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:
first and second light-transmitting substrates, each substrate having at least two major surfaces parallel to each other, edges, a light waves input aperture and at least one partially reflecting surface located in one of the substrates; first and second electronic display sources for producing light waves; first and second optical devices for coupling light waves from the first and the second electronic display sources, respectively, into the first and the second substrates, by total internal reflection, to form two electronic images which can be projected by the partially reflecting surfaces into two eyes of a viewer, the optical system facilitates dual operational modes in see-through configuration of an external scene allowing a viewer to see the electronic images or an external scene, wherein in a first mode, image light waves projected from the electronic display sources are coupled into the substrates and projected respectively into two eyes of a viewer, by the partially reflecting surfaces, and in a second mode, the electronic displays are shut-off and the external scene is directly viewable through the substrates. |
