Provided is a holographic display apparatus including a light source configured to emit light; a spatial light modulator configured to sequentially generate hologram patterns for modulating the light and to sequentially reproduce frames of hologram images based on the hologram patterns; and a controller configured to provide hologram data signals to the spatial light modulator, the hologram data signals being used to sequentially generate the hologram patterns. The controller is configured to further provide, to the spatial light modulator, diffraction pattern data signals for forming periodic diffraction patterns for adjusting locations of the hologram images to be reproduced on a hologram image plane, the diffraction pattern data signals being configured to move the periodic diffraction patterns on the spatial light modulator along a predetermined direction for each of the frames.

A light projection apparatus is provided comprising: a source of light; a switchable grating on a first substrate; and a diffractive optical element. Light is diffracted at least once by the switchable grating and is diffracted at least once by the DOE.

A sub-hogel configuration for a high-definition light field display. Also described is an optical device and three-dimensional light field display technology and more particularly, three-dimensional holographic pixels (hogels) composed of monochromatic sub-hogels and a designed metasurface acting as a directional optical element for a light field display. The described sub-hogel structure design and method is suited for an achromatic metasurface to provide directional pixels for multiple view light field coloured displays.

A sub-hogel configuration for a high-definition light field display. Also described is an optical device and three-dimensional light field display technology and more particularly, three-dimensional holographic pixels (hogels) composed of monochromatic sub-hogels and a designed metasurface acting as a directional optical element for a light field display. The described sub-hogel structure design and method is suited for an achromatic metasurface to provide directional pixels for multiple view light field coloured displays.

An image-sensing device includes photoelectric elements for receiving incident light. The photoelectric elements are arranged into unit cells, and each of the unit cells includes a first, a second, a third and a fourth photoelectric element. The first, the second, the third and the fourth photoelectric elements in each of the unit cells are formed of pillar structures, and the first, the second, the third and the fourth photoelectric elements are different sizes. The first photoelectric element captures a first image in a first phase, the second photoelectric element captures a second image in a second phase, the third photoelectric element captures a third image in a third phase, and the fourth photoelectric element captures a fourth image in a fourth phase. The first phase, the second phase, the third phase, and the fourth phase are different.

An image-sensing device includes photoelectric elements for receiving incident light. The photoelectric elements are arranged into unit cells, and each of the unit cells includes a first, a second, a third and a fourth photoelectric element. The first, the second, the third and the fourth photoelectric elements in each of the unit cells are formed of pillar structures, and the first, the second, the third and the fourth photoelectric elements are different sizes. The first photoelectric element captures a first image in a first phase, the second photoelectric element captures a second image in a second phase, the third photoelectric element captures a third image in a third phase, and the fourth photoelectric element captures a fourth image in a fourth phase. The first phase, the second phase, the third phase, and the fourth phase are different.

A sub-hogel configuration for a high-definition light field display that can be used in the design of optical device and three-dimensional light field display technology. Three-dimensional holographic pixels (hogels) composed of monochromatic sub-hogels and a designed metasurface act as a directional optical element for a light field display. The sub-hogel structure design and method is suited for an achromatic metasurface to provide directional pixels for multiple view light field colored displays.

A sub-hogel configuration for a high-definition light field display that can be used in the design of optical device and three-dimensional light field display technology. Three-dimensional holographic pixels (hogels) composed of monochromatic sub-hogels and a designed metasurface act as a directional optical element for a light field display. The sub-hogel structure design and method is suited for an achromatic metasurface to provide directional pixels for multiple view light field colored displays.

A method for producing a computer-generated hologram including producing a reference beam, producing an object beam, applying computer-generated information regarding the hologram to the object beam, overlapping the object beam and the reference beam on or in a light-sensitive recording medium in order to apply the hologram by exposure, wherein several portions of the light-sensitive recording medium are exposed, one after the other, to the object beam and the reference beam simultaneously in order to produce a plurality of sub-holograms, wherein the angle of incidence at which the reference beam hits the surface of a first portion of the recording medium is different from the angle of incidence at which the reference beam hits the surface of a second portion of the recording medium. A change in the angle of incidence of the reference beam is achieved by changing the point of incidence of the reference beam on a lens.

There is provided a driver for a spatial light modulator. The spatial light modulator comprises [m×n] pixels. The driver is arranged to receive input holograms each comprising [x×y] pixels, wherein m≥x and n≥y. The driver is further arranged to drive the spatial light modulator to display thereon output holograms each comprising [m×n] pixels by tiling each input hologram onto the pixels of the spatial light modulator to form an output hologram corresponding to each input hologram using a tiling scheme. The driver is arranged to use a first tiling scheme to display a first output hologram and a second tiling scheme to display a second output hologram. Each output hologram comprises a plurality of tiles of the input hologram. Each tiling scheme defines the size of each tile and the position of each tile on the pixels of the spatial light modulator.