Examples are disclosed relating to reducing orders of diffraction patterns in phase modulating devices. An example phase modulating device includes a phase modulating layer having first and second opposing sides, a common electrode adjacent the first side of the phase modulating layer, a plurality of pixel electrodes adjacent the second side of the phase modulating layer, and blurring material disposed between the phase modulating layer and the pixel electrodes. In the example phase modulating device, the blurring material is configured to smooth phase transitions in the phase modulating layer between localized areas associated with the pixel electrodes, the pixel electrodes have a pixel pitch by which the pixel electrodes are distributed along the phase modulating layer, and the pixel electrodes are separated from one another by an inter-pixel gap, where the ratio of the inter-pixel gap to the pixel pitch is between 0.50 and 1.0.

Light-emitting devices for motor vehicles are provided, which comprise a reflection hologram. A light-guiding body is provided to direct light from a light source arrangement (4) onto the hologram.

An apparatus and method for processing a holographic image are disclosed. The apparatus calculates a first calculation result with respect to an image for the left eye and a first calculation result with respect to an image for the right eye and stores the results at different memory addresses of a storage. Thereafter, the apparatus calculates values of a waveform of light to be modulated by a spatial light modulator by performing a second calculation that uses all of the first calculation results stored in the storage. An image window of the image for the left eye and an image window of the image for the right eye are spatially separated from each other by the apparatus in a viewing window of a hologram image reproduced via the spatial light modulator.

Holographic and diffractive optical encoding techniques for forming reflection or transmission holograms. The encoding device includes a substrate having an interference pattern that can propagate light along a light propagation path from one side of the substrate to another side of the substrate. Furthermore, an optical element may be used to propagate light according to a four-dimensional light field coordinate system.

A vehicle display device includes a reflection-type hologram disposed inside a windshield of a vehicle, and a projection device including an image display device outputting a display light and a regulating unit configured to regulate a diffusion angle of the display light, and to project the display light having passed through the regulating unit onto the hologram. The hologram outputs the display light projected from the projection device as diffracted light directed to an eye range of the vehicle, and the regulating unit is configured to regulate the diffusion angle of the display light to an upper limit angle or less such that the display light reflected from the windshield is directed in a direction different from the eye range.

A floating image display device includes a floating-image-formation optical system that forms an image at an opening part as a floating image from an image displayed on an image display unit, an authentication unit that judges whether or not a subject passing through the opening part is an authorized subject, and an image control unit that makes the image display unit switch contents of the image when the subject is judged as the authorized subject. The floating-image-formation optical system can include a beam splitter and a retroreflective sheet. Another floating image display device includes an image display unit that displays a first image, a floating-image-formation optical system that forms an image at an opening part as a floating image from the first image, and an image projection unit that projects a second image onto a subject moving through the floating image when the subject passes through the opening part.

A floating image display device includes an image display unit that displays a display image based on a first image signal, a floating-image-formation optical system that forms an image in air as a floating image from the display image, a guide image display unit that displays a guide image based on a second image signal nearby the floating image to be visually recognized on the same plane as the floating image as viewed from a viewer, and an image control unit that supplies the first image signal and the second image signal respectively to the image display unit and the guide image display unit. The image control unit supplies an image signal as the second image signal to the guide image display unit after the image signal undergoes at least one of a process of adding blurring, a process of lowering luminance and a process of lowering contrast.

A hologram image display apparatus includes an illumination optical system that emits an illumination light beam wavefront and a spatial light modulator having a light modulation area that converts the illumination light beam wavefront by diffraction to a display light beam wavefront and displays a virtual image. The spatial light modulator forms the display light beam wavefront by modulating the illumination light beam wavefront so that at least a portion of a regular light ray group configuring the display light beam wavefront is a light ray group with a diffraction angle having an absolute value greater than the ±first-order diffraction angle by the spatial light modulator, and another portion of the regular light ray group is a light ray group with a diffraction angle having an absolute value of the ±first-order diffraction angle or less by the spatial light modulator.

An auxiliary stop lamp for vehicles, in particular a high mounted stop lamp for vehicles, having a light source for the radiation of a light beam and having a holographic element for the refraction and/ or reflection of the light beam, the holographic element having a holographic light distributor to generate a stop light function, wherein the holographic element is arranged inside and/or in the region of an edge of a housing of the auxiliary stop lamp, or embodied as an edge of the housing of the auxiliary stop lamp.

The invention relates to a method for generating holograms for encoding in a spatial light modulation device for a holographic display for representing a two- and/or three-dimensional scene. The two- and/or three-dimensional scene is decomposed into object points and encoded in a hologram, which is subdivided into subholograms, in the spatial light modulation device. The object points of the scene are encoded into encoding regions on the spatial light modulation device. A size and/or shape of the encoding region is selected in relation to a size and/or shape of a subhologram, assigned to the encoding region, in such a way that crosstalk of higher diffraction orders in a virtual visibility region is reduced.