Passive projection screen for presenting projected images in 3D
A directive projection screen is configured to present images projected from a remote projector in three dimensions (3D) to a viewer. The screen includes a plurality of passive optical elements arranged on a structural substrate. The optical elements are configured to receive incident light projected from the projector and reflect the light such that first portions of the image are directed in a first direction to be viewed by a first eye of the viewer and second portions of the image are directed in a second direction to be viewed by a second eye of the viewer.
1. A device, comprising:
a substrate; and
a plurality of passive optical elements arranged on the substrate, the optical elements being configured to receive incident light projected from a remote projector and reflect the light such that first portions of the image are directed in a first direction to be viewed by a first eye of a viewer and second portions of the image are directed in a second direction to be viewed by a second eye of the viewer, wherein each of the optical elements comprises a cylindrical tube, the tube defining a hollow cavity through which the light is communicated.
2. The device of claim 1 , wherein the optical elements are arranged on a first side of the substrate, and a second surface is provided on an opposing second side of the substrate to present an image in two dimensions.
3. The device of claim 1 , wherein the cylindrical tube has a circular cross-section.
4. The device of claim 1 , wherein the cylindrical tube has an oval-shaped cross-section.
5. The device of claim 1 , wherein the cylindrical tube has a polygonal-shaped cross-section.
6. The device of claim 1 , wherein the cylindrical tube is formed of plastic.
7. The device of claim 1 , wherein each of the optical elements further comprises a reflector at the base of the cylindrical tube to reflect the light communicated through the hollow cavity.
8. The device of claim 7 , wherein the reflector has one of a flat surface, a concave surface, or a convex surface.
9. The device of claim 7 , wherein the reflector has a continuous reflection surface.
10. The device of claim 7 , wherein the reflector has a discontinuous reflection surface.
11. The device of claim 7 , wherein the reflector has at least two flat regions joined at an angle.
12. A device, comprising:
a substrate; and
a plurality of passive optical elements arranged on the substrate, the optical elements being configured to receive incident light projected from a remote projector and reflect the light such that first portions of the image are directed in a first direction to be viewed by a first eye of a viewer and second portions of the image are directed in a second direction to be viewed by a second eye of the viewer, wherein each of the optical elements comprises a cylindrical tube having a diameter equal to or less than about 100 microns, the tube defining a hollow cavity through which the light is communicated.
13. The device of claim 12 , wherein the optical elements are arranged on a first side of the substrate, and a second surface is provided on an opposing second side of the substrate to present an image in two dimensions.
14. The device of claim 12 , wherein the cylindrical tube is formed of plastic.
15. The device of claim 12 , wherein each of the optical elements further comprises a reflector at the base of the cylindrical tube to reflect the light communicated through the hollow cavity.
16. The device of claim 15 , wherein the reflector has one of a flat surface, a concave surface, or a convex surface.
17. The device of claim 15 , wherein the reflector has a continuous reflection surface.
18. The device of claim 15 , wherein the reflector has a discontinuous reflection surface.
19. The device of claim 15 , wherein the reflector has at least two flat regions joined at an angle.