An optical device includes an optical component (e.g., a polarization volume hologram, a geometric phase device, or a polarization-insensitive diffractive optical element) having a uniform thickness and configured to modify a wavefront of a light beam that includes light in two or more wavelengths visible to human eyes, where the optical component has a chromatic aberration between the two or more wavelengths. The optical device also includes a metasurface on the optical component. The metasurface includes a plurality of nanostructures configured to modify respective phases of incident light at a plurality of regions of the metasurface, where the plurality of nanostructures is configured to, at each region of the plurality of regions, add a respective phase delay for each of the two or more wavelengths to correct the chromatic aberration between the two or more wavelengths.

The disclosed optical assembly may include a photoalignment layer that includes photoalignment material (PAM) anchored to a substrate according to a specified surface anchoring. The optical assembly may also include a functional or transforming layer that is applied to the photoalignment layer. The transforming layer may modify the surface anchoring of the photoalignment layer to align with a polarization volume hologram layer. The polarization volume hologram layer of the optical assembly may be disposed on the transforming layer. Various other methods of manufacturing, systems, and apparatuses are also disclosed.

An optical device having suppressed rainbow effect is provided. The optical device includes a light source configured to generate an image light, an optical combiner coupled with the light source and configured to direct the image light to an eye-box of the optical device, and a dimming element disposed at the optical combiner. The optical combiner includes at least one diffractive element. The optical combiner has a first side facing the eye-box and an opposing second side facing a real world, and the dimming element is disposed at the second side of the optical combiner. The dimming element is configured to receive a light from the real world and significantly attenuate an intensity of the light having an incidence angle in a predetermined range.

A method is provided. The method includes directing a first beam to a polarization sensitive recording medium. The method also includes directing a second beam to the polarization sensitive recording medium to interfere with the first beam to generate a polarization interference pattern, to which the polarization sensitive recording medium is exposed. One of the first beam and the second beam has a planar wavefront and the other has a non-planar wavefront. A first propagation direction of the first beam and a second propagation of the second beam are non-parallel.

A beam scanner of a near-eye display includes a pair of tiltable reflectors and a beam-folding pupil relay coupling the tiltable reflectors optically together. The beam-folding pupil relay includes a beamsplitter for receiving the light beam reflected by the first tiltable reflector, and a first curved reflector for receiving the light beam from the beamsplitter, and for reflecting the light beam back towards the beamsplitter. The beam-folded pupil relay is configured to couple the light beam reflected by the first curved reflector to the second tiltable reflector. A second curved reflector may be provided for coupling the light beam scanned by the tiltable reflectors to a pupil-replicating waveguide. A controller may be provided for scanning the light beam in coordination with operating the light source at varying levels of brightness or color.

A security document having a security element including a multilayer body with a volume hologram layer and a partial opaque layer, arranged on a surface of the volume hologram layer, which is present in a first area and is not present in a second area.

Provided is a small-sized light irradiating device having a simple configuration that projects an optical pattern. The light irradiating device includes a light source and a liquid crystal hologram element, in which the liquid crystal hologram element diffracts transmitted light in a plurality of different directions, the liquid crystal hologram element includes a liquid crystal hologram layer, the liquid crystal hologram layer is a layer that consists of a computer generated hologram and is formed of a composition including a liquid crystal compound, and the liquid crystal hologram layer further includes a plurality of regions in which directions of optical axes derived from the liquid crystal compound are different from each other.

An optical device and an eye-tracking system to suppress a rainbow effect are provided. The optical device includes a grating. The grating includes at least one substrate and a grating structure coupled to the at least one substrate. The grating structure is configured to diffract an infrared light beam and transmit a visible light beam with a diffraction efficiency less than a predetermined threshold.

A holographic display apparatus includes a light source disposed on a printed circuit board, a display panel diffracting light transferred from the light source, and an optical system disposed between the light source and the display panel. The optical system converts the light incident from the light source into a surface light source.

A method of holographic projection. The method comprises projecting at least one calibration image using a first colour holographic channel and a second colour holographic channel. Each calibration image comprises at least one light spot. The method comprises performing the following steps for each calibration image in order to determine a plurality of displacements vectors at a respective plurality of different locations on the replay plane. A first step comprises projecting the calibration image onto the replay plane using a first colour holographic channel by displaying a first hologram on a first spatial light modulator and illuminating the first spatial light modulator with light of the first colour. A second step comprises projecting the calibration image onto the replay using a second colour holographic channel by displaying a second hologram on a second spatial light modulator and illuminating the second spatial light modulator with light of the second colour. It may be said that the first and second hologram correspond to the calibration image. A third step comprises determining the displacement vector between the light spot formed by the first colour holographic channel and the light spot formed by the second colour holographic channel. A fourth step comprises pre-processing an image for projection using the second colour holographic channel in accordance with the plurality of determined displacement vectors.