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US 12,078,815 B1Granted
Polarization volume hologram lens
AssigneeMeta Platforms Technologies, LLC
InventorsScott Charles McEldowney, Lu Lu, Babak Amirsolaimani
Life of this patent
Estimating the term…
Abstract
A lens may include optically anisotropic molecules arranged in helical structures. The lens may include a first portion, a second portion located around the first portion, and a third portion located around the second portion. The first portion may include a first helical structure having a first helical pitch. The second portion may include a second helical structure having a second helical pitch distinct from the first helical pitch. The third portion may include a third helical structure having a third helical pitch distinct from the first helical pitch and the second helical pitch. The second helical pitch may have a length that is between a length of the first helical pitch and a length of the third helical pitch.
Claims20
A lens, comprising:
- optically anisotropic molecules arranged in helical structures, wherein:
- the lens includes a first portion, a second portion located around the first portion, and a third portion located around the second portion;
- the first portion includes optically anisotropic molecules arranged in a first helical structure having a first helical pitch along a first helical axis, within the first portion, parallel to an optical axis of the lens;
- the second portion includes optically anisotropic molecules arranged in a second helical structure having a second helical pitch distinct, from the first helical pitch, along a second helical axis, within the second portion, parallel to the optical axis of the lens;
- the third portion includes optically anisotropic molecules arranged in a third helical structure having a third helical pitch, distinct from the first helical pitch and the second helical pitch, along a third helical axis, within the third portion, parallel to the optical axis of the lens;
- and
- the second helical pitch has a length that is between a length of the first helical pitch and a length of the third helical pitch.
4 more elements
A method, comprising:
- receiving first light of a first circular polarization and second light of a second circular polarization distinct from the first polarization with a lens including optically anisotropic molecules arranged in helical structures, wherein:
- the lens includes a first portion, a second portion located around the first portion, and a third portion located around the second portion;
- the first portion includes optically anisotropic molecules arranged in a first helical structure having a first helical pitch along a first helical axis, within the first portion, parallel to an optical axis of the lens;
- the second portion includes optically anisotropic molecules arranged in a second helical structure having a second helical pitch, distinct from the first helical pitch, along a second helical axis, within the second portion, parallel to the optical axis of the lens;
- the third portion includes optically anisotropic molecules arranged in a third helical structure having a third helical pitch, distinct from the first helical pitch and the second helical pitch, along a third helical axis, within the third portion, parallel to the optical axis of the lens;
- and
- the second helical pitch has a length that is between a length of the first helical pitch and a length of the third helical pitch;
- and
- focusing, with the lens, the first light while transmitting the second light through the lens without focusing the second light, or defocusing, with the lens, the first light while transmitting the second light through the lens without defocusing the second light.
6 more elements
A method for making a lens, comprising:
- arranging a layer of optically anisotropic molecules in helical configurations, wherein the layer of optically anisotropic molecules includes a first portion, a second portion, and a third portion, wherein:
- the lens includes a first portion, a second portion located around the first portion, and a third portion located around the second portion;
- the first portion includes optically anisotropic molecules arranged in a first helical structure having a first helical pitch along a first helical axis, within the first portion, parallel to an optical axis of the lens;
- the second portion includes optically anisotropic molecules arranged in a second helical structure having a second helical pitch, distinct from the first helical pitch, along a second helical axis, within the second portion, parallel to the optical axis of the lens;
- the third portion includes optically anisotropic molecules arranged in a third helical structure having a third helical pitch, distinct from the first helical pitch and the second helical pitch, along a third helical axis, within the third portion, parallel to the optical axis of the lens;
- and
- the second helical pitch has a length that is between a length of the first helical pitch and a length of the third helical pitch;
- and
- firming the layer of optically anisotropic molecules.
6 more elements
Dependencies are inferred from the claim text.