BEAM GUIDING DEVICE
An example apparatus for a beam guiding device. The apparatus includes a curved lens and a beam splitter attached to the curved lens for splitting an incident light beam into a number of light beams. The apparatus may also include a coupling holographic optical element (HOE) attached to the curved lens to divert the number of light beams to a holographic coupling angle. The apparatus may also include a pair of waveguide HOEs to reflect the number of light beams within the curved lens. The apparatus may also include a decoupling HOE to divert the number of light beams from a holographic coupling angle out of the curved lens.
1 . A curved lens apparatus for a beam guiding device comprising:
a curved lens;
a beam splitter attached to the curved lens for splitting an incident light beam into a plurality of light beams;
a coupling holographic optical element (HOE) attached to the curved lens to divert the plurality of light beams to a holographic coupling angle;
a pair of waveguide HOEs to reflect the plurality of light beams within the curved lens; and
a decoupling HOE to divert the plurality of light beams from a holographic coupling angle out of the curved lens.
2 . The apparatus of claim 1 , wherein the beam splitter is a diffractive optical element.
3 . The apparatus of claim 1 , wherein the beam splitter is a holographic optical element.
4 . The apparatus of claim 1 , wherein the beam splitter is mounted on a convex side of the curved lens.
5 . The apparatus of claim 1 , wherein the beam splitter is mounted on a concave side of the curved lens.
6 . The apparatus of claim 1 , wherein the waveguide HOEs comprise a first HOE that is attached to a convex side of the curved lens and a second HOE that is attached to a concave side of the curved lens.
7 . The apparatus of claim 1 , wherein the decoupling HOE to divert the plurality of light beams out of the curved lens to form multiple eyeboxes.
8 . The apparatus of claim 1 , wherein the curved lens is made of a material with a corresponding maximum total internal reflection angle, and wherein the holographic coupling angle is smaller than the internal reflection angle.
9 . The apparatus of claim 1 , comprising a frame to secure the curved lens, wherein incident light beam comprises a laser beam projected from the frame.
10 . A method for guiding beams in a curved lens comprising:
splitting an incident light beam into a plurality of light beams with a beam splitter attached to a curved lens;
diverting, with a coupling holographic optical element (HOE) attached to the curved lens, the plurality of light beams to a holographic coupling angle;
reflecting, with a pair of waveguide HOEs, the plurality of light beams at a holographic coupling angle within the curved lens; and
diverting, with a decoupling HOE, the plurality of light beams from a holographic coupling angle out of the curved lens.
11 . The method of claim 10 , wherein the beam splitter is a diffractive optical element.
12 . The method of claim 10 , wherein the beam splitter is a holographic optical element.
13 . The method of claim 10 , wherein the beam splitter is mounted on a convex side of a curved lens.
14 . The method of claim 10 , wherein the beam splitter is mounted on a concave side of a curved lens.
15 . The method of claim 10 , wherein the waveguide HOEs comprise a first HOE that is attached to a convex side of the curved lens and a second HOE that is attached to a concave side of the curved lens.
16 . The method of claim 10 , wherein the decoupling HOE diverts the plurality of light beams out of the curved lens to form multiple eyeboxes.
17 . The method of claim 10 , wherein the curved lens is made of a material with a corresponding maximum total internal reflection angle, and wherein the holographic coupling angle is smaller than the internal reflection angle.
18 . The method of claim 10 , wherein the beam splitting and the curved lenses are secured in a frame, wherein the incident light beam comprises a laser beam projected from the frame.
19 . A head mountable display system for guiding beams of light, comprising:
a frame;
an image processing integrated circuit mounted in the frame;
an optical engine mounted in the frame; and
a curved lens mounted in the frame, the curved lens comprising:
a beam splitter attached to the curved lens for splitting a light beam from the optical engine into a plurality of light beams
a coupling holographic optical element (HOE) attached to the curved lens to divert the plurality of light beams to a holographic coupling angle;
a pair of waveguide HOEs to reflect the plurality of light beams within the curved lens; and
a decoupling HOE to divert the plurality of light beams from a holographic coupling angle out of the curved lens.
20 . The system of claim 19 , wherein the waveguide HOEs comprise a first HOE that is attached to a convex side of the curved lens and a second HOE that is attached to a concave side of the curved lens.
21 . The system of claim 19 , wherein the decoupling HOE diverts the plurality of light beams out of the curved lens to form multiple eyeboxes.
22 . The system of claim 19 , wherein the curved lens is made of a material with a corresponding maximum total internal reflection angle, and wherein the holographic coupling angle is smaller than the internal reflection angle.
23 . The system of claim 19 , wherein the optical engine comprises:
a laser diode to generate a light beam; and
a micro-electro-mechanical system (MEMS) mirror to direct the light beam towards the curved lens.
24 . The system of claim 19 , comprising a wireless transceiver to provide data to the image processing integrated circuit for display by the head mountable display device.
25 . The system of claim 24 , comprising a wireless computing device to couple to the wireless transceiver to transmit image data for display by the head mountable display device.