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AssigneeOxford University Innovation Limited
InventorsJulian FELLS, Steve ELSTON, Martin BOOTH, Patrick SALTER, Stephen MORRIS
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A device for modulation of light (16) having a wavelength, comprising: a first substrate (10) with a first face (81) and a second opposite face (82), and comprising a first electrode (11); a second substrate (20) adjacent to the second face (82) and defining a gap between the first and second substrate (10, 20), the second substrate (20) comprising a second electrode (21); a responsive liquid crystal layer (15) disposed in the gap, wherein the responsive liquid crystal layer (15) has a flexoelectro-optic chiral nematic phase, and is birefringent with an optic axis that tilts in response to an applied electric field between the first and second electrode (11, 21); and a minor adjacent to the second substrate (20), the minor configured to reflect incident circular polarised light while preserving its handedness.
A device for phase modulation of light, comprising:
The device of any preceding claim, further comprising a circular polariser.
The device of any preceding claim, wherein the second electrode is reflective and the mirror comprises the reflective second electrode.
The device of any preceding claim, wherein the first and second substrate are substantially parallel to one another.
The device of any preceding claim, wherein the responsive liquid crystal layer has a helix axis in a plane substantially parallel to the substrates
The device of any preceding claim, wherein the responsive liquid crystal layer is in the uniform lying helix mode.
The device of any preceding claim, wherein the first and second electrodes are respectively on inside surfaces of the first and second substrates.
The device of any preceding claim, wherein the electrodes are configured to generate an electric field which is substantially perpendicular to a plane of the first and/or second substrate.
The device of any preceding claim, wherein the tilt of the responsive liquid crystal layer is in a plane parallel to the first and/or second substrate.
The device of any preceding claim, wherein the responsive liquid crystal layer has phase retardation of 140 to 220 degrees.
The device of any preceding claim, wherein the first substrate comprises a first alignment layer, and the second substrate comprises a second alignment layer.
A spatial light modulator comprising an array of devices according to any preceding claim, configured for independent control of the modulation of each device in the array.
The system of any preceding claim, wherein the system is configured as:
A method of modulating the phase of circularly polarised light, comprising:
Dependencies are inferred from the claim text.