Abstract: An optical arrangement for expanding and uniformizing a beam of light, including a first optical member arranged to receive a collimated incoming light beam, from an incoming beam direction, with a first polarization, the first optical member configured to expand and uniformize the collimated incoming light beam along a first axis to form a first collimated light beam exiting therefrom in a first beam direction; a second optical member adapted to receive the first collimated light beam, from the first beam direction, with the first polarization in relation thereto, the second optical member configured to expand and uniformize the first collimated light beam along a second axis to form a second collimated light beam exiting therefrom in a second beam direction.

Abstract: An optical arrangement for expanding and uniformizing a beam of light, including a first optical member arranged to receive a collimated incoming light beam, from an incoming beam direction, with a first polarization, the first optical member configured to expand and uniformize the collimated incoming light beam along a first axis to form a first collimated light beam exiting therefrom in a first beam direction; a second optical member adapted to receive the first collimated light beam, from the first beam direction, with the first polarization in relation thereto, the second optical member configured to expand and uniformize the first collimated light beam along a second axis to form a second collimated light beam exiting therefrom in a second beam direction.

Abstract: A liquid crystal cell including at least two substrates transparent to visible part of light spectrum, a liquid crystal layer encased between the substrates, and a stack of functional layers formed over the substrates and enclosed between a given substrate and the liquid crystal layer. In a direction from the given substrate towards the liquid crystal layer, said stack comprises a first dielectric layer, a transparent electrode layer, and a second dielectric layer. A refractive index of the first dielectric layer lies in a range between a refractive index of the given substrate and a refractive index of the transparent electrode layer. A refractive index of the second dielectric layer lies in a range between the refractive index of the transparent electrode layer and a refractive index of the liquid crystal layer corresponding to a homeotropic alignment of a liquid crystal material of the liquid crystal layer.

Abstract: An optical element for expanding and uniforming a beam of light. The optical element includes a plurality of layers of a first type and plurality of layers of a second type arranged as a stack of layers. The stack of layers includes an input facet for receiving a beam of light and an output facet to output expanded and uniformed beam of light. The stack of layers forms a right triangular prism having a first side and a second side of a same width.

Abstract: A liquid crystal cell including at least two substrates transparent to visible part of light spectrum, a liquid crystal layer encased between the substrates, and a stack of functional layers formed over the substrates and enclosed between a given substrate and the liquid crystal layer. In a direction from the given substrate towards the liquid crystal layer, said stack comprises a first dielectric layer, a transparent electrode layer, and a second dielectric layer. A refractive index of the first dielectric layer lies in a range between a refractive index of the given substrate and a refractive index of the transparent electrode layer. A refractive index of the second dielectric layer lies in a range between the refractive index of the transparent electrode layer and a refractive index of the liquid crystal layer corresponding to a homeotropic alignment of a liquid crystal material of the liquid crystal layer.

Abstract: A display system including an image source, an optical image deflector unit with an image entry surface, and a first optics arranged between the image entry surface and the image source. The image source generates image information for one or more focal distances which is directed towards the image entry surface by the first optics. The optical image deflector unit includes a first surface and a second surface. The first surface is arranged to reflect the directed image information towards a semi-reflective outcoupling surface, with an angle of incidence higher than a first angle. The semi-reflective outcoupling surface is arranged between the first and the second surface to reflect the reflected one or more image information towards the first surface, with an angle of incidence lower than the first angle. The image entry surface is arranged between the image source and a semi-reflective outcoupling surface.

Abstract: A near-eye display apparatus for displaying a three-dimensional image to a user. The apparatus includes an image projecting means to project pairs of images associated with different cross-sectional planes of the three-dimensional image; at least one optical display arrangement including a plurality of optical elements, wherein each of the plurality of optical elements is operable to be switched between a first optical state and a second optical state; a control arrangement that is operable to control the at least one optical display arrangement to separately switch each optical element from the first optical state to the second optical state, and the image projecting means to project a separate pair of images on each optical element in the second optical state; and at least one optical device that allows display of the three-dimensional image to each eye of the user.

Abstract: An electro-optical unit for a volumetric display device is disclosed. The electro-optical unit includes first optical diffuser element including first substrate and second substrate, first electrode arranged on inner side of the first substrate and second electrode arranged on inner side of the second substrate, and first liquid crystal layer arranged between the first electrode and the second electrode; and a second optical diffuser element including third substrate and fourth substrate, third electrode arranged on inner side of third substrate and fourth electrode arranged on inner side of the fourth substrate, and second liquid crystal layer arranged between third electrode and fourth electrode. Further, the electro-optical unit includes a first transitional medium layer arranged between the first optical diffuser element and the second optical diffuser element, with a refractive index equivalent to a refractive index of one or more of the fourth substrate and the fifth substrate.

Abstract: A table-top volumetric display apparatus for presenting three-dimensional imagery.

Abstract: There is disclosed an optical display arrangement. The optical display arrangement includes an optical element, a voltage source connected to the optical element and a controller operatively coupled to the voltage source. The controller is operable to control the voltage source to apply a first voltage pulse over an operating voltage for a first period of time, to the optical element, to switch the optical element from a first optical state to a second optical state wherein the first voltage pulse is a sum of elevated voltage and operating voltage. Furthermore, the controller is operable to provide the operating voltage to the optical element to maintain the optical element in the second optical state. Moreover, the controller is operable to remove the operating voltage from the optical element to switch the optical element from the second optical state to the first optical state.

Abstract: A near-eye display apparatus for displaying a three-dimensional image to a user. The apparatus includes an image projecting means to project pairs of images associated with different cross-sectional planes of the three-dimensional image; at least one optical display arrangement including a plurality of optical elements, wherein each of the plurality of optical elements is operable to be switched between a first optical state and a second optical state; a control arrangement that is operable to control the at least one optical display arrangement to separately switch each optical element from the first optical state to the second optical state, and the image projecting means to project a separate pair of images on each optical element in the second optical state; and at least one optical device that allows display of the three-dimensional image to each eye of the user.

Abstract: There is disclosed an optical display arrangement. The optical display arrangement includes an optical element, a voltage source connected to the optical element and a controller operatively coupled to the voltage source. The controller is operable to control the voltage source to apply a first voltage pulse over an operating voltage for a first period of time, to the optical element, to switch the optical element from a first optical state to a second optical state wherein the first voltage pulse is a sum of elevated voltage and operating voltage. Furthermore, the controller is operable to provide the operating voltage to the optical element to maintain the optical element in the second optical state. Moreover, the controller is operable to remove the operating voltage from the optical element to switch the optical element from the second optical state to the first optical state.