Etendue Expander for a Display
AssigneeEnvisics Ltd
InventorRuisheng Lin
Life of this patent
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Abstract
An etendue expander for a display. The etendue expander comprises a first lens arranged to form a holographic reconstruction of a hologram displayed at a first focal plane thereof. The holographic reconstruction comprises a plurality of pixels. The etendue expander comprises a plurality of microlenses. Each microlens is aligned with a respective pixel of the holographic reconstruction to form an image of the plurality of pixels. The etendue expander comprises a second lens arranged such that the image of the plurality of pixels is disposed at a first focal plane thereof and a relayed hologram is formed at a second focal plane thereof. The etendue of the relayed hologram is greater than that of the hologram.
Claims20
An etendue expander for a display, the etendue expander comprising:
- a first lens arranged to form a holographic reconstruction of a hologram displayed at a first focal plane thereof, wherein the holographic reconstruction comprises a plurality of pixels;
- a plurality of microlenses, wherein each microlens is aligned with a respective pixel of the holographic reconstruction to form an image of the plurality of pixels;
- and
- a second lens arranged such that the image of the plurality of pixels is disposed at a first focal plane thereof and a relayed hologram is formed at a second focal plane thereof, wherein an etendue of the relayed hologram is greater than that of the hologram.
A method of expanding an etendue of a holographic wavefront, comprising:
- forming a holographic reconstruction of a hologram at a first focal plane of a first lens, wherein the holographic reconstruction comprises a plurality of pixels;
- forming an image of the plurality of pixels with a plurality of microlenses, wherein each microlens is aligned with a respective pixel of the holographic reconstruction;
- and
- forming a relayed hologram at a first focal plane of a second lens wherein the image of the plurality of pixels is disposed at a second focal plane thereof, wherein an etendue of the relayed hologram is greater than that of the hologram.
A system comprising:
- a first lens arranged to form a holographic reconstruction of a hologram displayed at a first focal plane thereof, wherein the holographic reconstruction comprises a plurality of pixels;
- a plurality of microlenses, wherein each microlens is aligned with a respective pixel of the holographic reconstruction to form an image of the plurality of pixels;
- a second lens arranged such that the image of the plurality of pixels is disposed at a first focal plane thereof and a relayed hologram is formed at a second focal plane thereof, wherein an etendue of the relayed hologram is greater than that of the hologram;
- and
- a first waveguide optically connected to the second lens, the first waveguide configured to receive the relayed hologram and replicate the relayed hologram along a first dimension.
Dependencies are inferred from the claim text.