Abstract:
The present disclosure provides systems, methods and apparatus for producing holographic displays using an electromechanical systems device. In one aspect, the method can be implemented to allow for simultaneous modulation of phase and amplitude of light in a display device composed of a plurality of pixels. A light source (150) can provide sufficiently coherent light to a light guide (170), which can direct the light to a plurality of reflective members (112, 114). The reflective members can reflect the light to a pinhole - lenslet array (190). The combination of the pinhole - lenslet array (190) and the reflective members (112, 114) can act as a spatial light modulator, modulating the phase and amplitude of the light reflected by the reflective members. The lenslet (192) can focus the light to a plane at the opening of the pinhole (194), wherein the light can exit the pinhole to be viewed in combination with light from additional pixels, and can be viewed as a holographic image.
Abstract:
Die Erfindung betrifft ein Anzeigegerät, insbesondere ein Head-Mounted Display oder Hokular, mit einem räumlichen Lichtmodulator (200) und einer steuerbaren Lichtablenk-Einrichtung (400) zum Erzeugen einer aus Segmenten zusammengesetzten Mehrfachabbildung des räumlichen Lichtmodulators (200), wobei die Mehrfachabbildung mindestens mit einer vorgebbaren Anzahl von Segmenten erfolgt, welche die Größe eines Sichtbarkeitsbereiches bestimmt, innerhalb dem eine im räumlichen Lichtmodulator holographisch kodierte 3D Szene zum Betrachten für ein Betrachterauge (1000) rekonstruierbar ist.
Abstract:
This invention relates to methods, apparatus, and computer program code for the holographic display of images. We describe a method of displaying an image holographically, the method comprising displaying a hologram on pixels of a spatial light modulator (SLM) and illuminating said SLM such that said image is displayed in pixels of a replay field (RPF) of said hologram, and wherein the method further comprises subdividing said replay field into a plurality of spatially interlaced regions, and displaying holograms for each of said interlaced regions of said replay field sequentially at different times such that in an observer's eye said interlaced regions integrate to give the impression of said image and such that interference between adjacent pixels of said replay field is reduced.
Abstract:
This invention relates to methods, apparatus, and computer program code for the holographic display of images. We describe a method of displaying an image holographically, the method comprising displaying a hologram on pixels of a spatial light modulator (SLM) and illuminating said SLM such that said image is displayed in pixels of a replay field (RPF) of said hologram, and wherein the method further comprises subdividing said replay field into a plurality of spatially interlaced regions, and displaying holograms for each of said interlaced regions of said replay field sequentially at different times such that in an observer's eye said interlaced regions integrate to give the impression of said image and such that interference between adjacent pixels of said replay field is reduced.
Abstract:
Die Erfindung betrifft ein Verfahren zum Rekonstruieren einer dreidimensionalen Szene in einem holographischen Display, bei dem die zu rekonstruierende 3D-Szene in Objektpunkte zerlegt und jeweils ein Objektpunkt als Subhologramm im Lichtmodulator kodiert wird, wobei Prozessor- und Rekonstruktionsmittel zum Berechnen und Kodieren sowie zum Rekonstruieren der 3D-Szene enthalten sind, um bekannte Nachteile beim Kodieren eines Hologramms und beim holographischen Rekonstruieren der 3D-Szene in holographischen Displayeinrichtungen zu vermeiden. Lösungsgemäß sind Prozessorelemente vorgesehen, um im Lichtmodulationsmittel (L) ein verschiebbares zweidimensionales Raster zu generieren, aus rasterbezogenen Objektpunkten (OPn) Objektpunktgruppen (OPGm) zu bilden, deren Hologramme sequentiell kodiert werden und mit denen in schneller zeitlicher Folge in sich kohärente, aber zueinander inkohärente Teilrekonstruktionen der Objektpunktgruppen (OPGm) erzeugt werden, wobei die Wellenfronten rekonstruierter Objektpunkte sequentiell innerhalb eines Sichtbarkeitsbereichs überlagert werden, so dass die Rekonstruktion der 3D-Szene als eine zeitlich gemittelte Rekonstruktion zu sehen ist.
Abstract:
A holographic imaging system includes an electrical addressable spatial light modulator (EASLM4) and an optically addressable spatial light modulator (OASLM6). A read light (10, 12) is configured to illuminate the OASLM, and a controller is configured to address the EASLM with both positive and negative sub-images which are optically transmitted to the OASLM. The controller is further configured to address the OASLM with an operating voltage (25), wherein the read light (12) generates a holographic image (27) comprised of diffraction patterns from the positive and negative sub-images.
Abstract:
A holographic display comprising light sources (L51, L52,...) in a 2D light source array, lenses (Ll, L2,...) in a 2D lens array, a spatial light modulator (SLM) and a beamsplitter, in which there are m light sources per lens, and the light sources are in m- to-one correspondence with the lenses. The beamsplitter splits the rays leaving the SLM into two bundles, one of which illuminates the virtual observer windows for m left eyes (VOWL) and the other illuminates the virtual observer windows for m right eyes (VOWR). In one example, m=l. An advantage is 2D-encoding with vertical and horizontal focusing and vertical and horizontal motion parallax.
Abstract:
This invention relates to hardware acceleration of signal processing systems for displaying an image using holographic techniques. A hardware accelerator for a holographic image display system, the image display system being configured to generate a displayed image using a plurality of holographically generated temporal subframes, said temporal subframes being displayed sequentially in time such that they are perceived as a single reduced-noise image, each said subframe being generated holographically by modulation of a spatial light modulator with holographic data such that replay of a hologram defined by said holographic data defines a said subframe, the hardware accelerator comprising: an input buffer to store image data defining said displayed image; an output buffer to store holographic data for a said subframe; at least one hardware data processing module coupled to said input data buffer and to said output data buffer to process said image data to generate said holographic data for a said subframe; and a controller coupled to said at least one hardware data processing module to control said at least one data processing module to provide holographic data for a plurality of said subframes corresponding to image data for a single said displayed image to said output data buffer.
Abstract:
Holographic Image Display Systems This invention relates to method, apparatus and computer program code for improved techniques for holographic image display systems. A method of generating data for a pixellated hologram display device provided with a phase mask represented by phase mask data, for generating a holographic image, the method comprising: inputting image data for said holographic image; performing a holographic transform on data derived from said image data to generate hologram data (m) for said hologram display device, using said phase mask data to adjust said hologram data for corresponding regions of said hologram display device and said phase mask; and quantising said hologram data (m) to generate quantised pixel data for display on said hologram display device with said phase mask to generate said holographic image; wherein said quantising is performed successively for pixels of said hologram displa y device; and wherein the method further comprises: determining an error in said data for a pixel of said hologram display device resulting from said quantising and using said error data to compensate said hologram data (mc) prior to quantising said hologram data to generate quantised pixel data for a further pixel of said hologram display device.