Abstract: A volumetric display unit includes two first type of substrate members, each having a corresponding conductive electrode layer formed on at least a portion at a corresponding first side thereof. The volumetric display unit also includes one or more second type of substrate members, each having two conductive electrode layers formed on at least a portion at each one of two opposing sides thereof. Herein, the substrate members are arranged to form a stack, with the first sides facing each other. The volumetric display unit further comprises a plurality of liquid crystal layers, each being separately disposed between two of the conductive electrode layers of two adjacent substrate members of the plurality of substrate members in the formed stack.

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 apparatus for displaying a three-dimensional image. The apparatus includes a light source, an intensity modulator to modulate an intensity of a given light beam, a mirror device to modulate spatially the intensity-modulated light beam at a given time instant, a first optics to collimate the spatially-modulated light beam and an image waveguide comprising an in-coupling structure to receive the collimated light beam and an out-coupling structure comprising out-coupling sites. The image waveguide directs the collimated light to the out-coupling structure which selectively redirects multiple reflections towards a segmented optical structure comprising at least two types of segments to redirect a first part of the multiple reflections to form a first type image point P1 at a first focal distance d1, d1? and a second part of the multiple reflections to form a second type image point P2 at a second focal distance d2, d2?.

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: An apparatus for displaying a three-dimensional image. The apparatus includes a light source, an intensity modulator to modulate an intensity of a given light beam, a mirror device to modulate spatially the intensity-modulated light beam at a given time instant, a first optics to collimate the spatially-modulated light beam and an image waveguide comprising an in-coupling structure to receive the collimated light beam and an out-coupling structure comprising out-coupling sites. The image waveguide directs the collimated light to the out-coupling structure which selectively redirects multiple reflections towards a segmented optical structure comprising at least two types of segments to redirect a first part of the multiple reflections to form a first type image point P1 at a first focal distance d1, d1? and a second part of the multiple reflections to form a second type image point P2 at a second focal distance d2, d2?.

Abstract: A display system and a method for displaying a three-dimensional image. A light source is employed to emit a light beam towards a first optics. The first optics is employed to collimate and form the light beam and provide the collimated light beam towards a spatial light modulator. The spatial light modulator is employed to modulate the collimated light beam and the modulated light beam is provided to a first direction. A first optical image expander is inclined at a first angle ‘?’ in respect to the first direction and is employed to reflect the modulated light beam to a second direction. A second optical image expander is inclined at a second angle ‘?’ in respect to the second direction and is employed to reflect the reflected light beam to a third direction. A screen element is arranged on the optical path for displaying a three-dimensional image.

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 display system for presenting three-dimensional images. The display system includes projection unit including projection subassemblies, wherein each projection subassembly includes array of point-like light sources, spatial light modulator and controller; projection screen; and processor. The processor is configured to: process three-dimensional data pertaining to a scene to generate image data of three-dimensional image; and display three-dimensional image, via projection subassemblies of the projection unit, wherein, in each of projection subassemblies, the controller is configured to multiplex operations of individual point-like light sources of the array and the spatial light modulator in a time-sequential manner, based on the image data of three-dimensional image, to display a plurality of segments of three-dimensional image sequentially.

Abstract: A display apparatus for presenting three-dimensional imagery, including an optical combiner having a first side, a second side, a third side and a fourth side. The second side is opposite to the first side and the fourth side being is opposite to the third side. Optical combiner further includes a first semi-transparent reflective portion arranged to reflect light incoming from the first side towards the fourth side and a second semi-transparent reflective portion arranged to reflect light incoming from the second side towards the fourth side. Light incoming from the third side passes through the first semi-transparent reflective portion and the second semi-transparent reflective portion towards the fourth side.

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 volumetric display system for displaying a three-dimensional image. The volumetric display system includes a multi-plane volumetric display with display elements; a graphics processing unit to process the aforesaid image to generate image planes corresponding thereto; and a projector communicably coupled to the aforesaid elements. The projector includes a light source for emitting a light beam; a spatial light modulator to modulate the emitted light beam; a telecentric projection arrangement to direct the modulated light beam towards the display elements, whilst providing a substantially-constant magnification of the modulated light beam; and a driver module coupled to the light source, the spatial light modulator. The driver module receives the image planes from the graphics processing unit, and projects the image planes upon the display elements, by way of the modulated light beam.