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400results about "Digital holography electronic component" patented technology
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Method of computing a hologram
ActiveUS20060139711A1Reduce calculationQuality improvementHolographic light sources/light beam propertiesHolographic optical componentsWavefrontComputer science
A method of computing a hologram by determining the wavefronts at the approximate observer eye position that would be generated by a real version of an object to be reconstructed. In normal computer generated holograms, one determines the wavefronts needed to reconstruct an object; this is not done directly in the present invention. Instead, one determines the wavefronts at an observer window that would be generated by a real object located at the same position of the reconstructed object. One can then back-transforms these wavefronts to the hologram to determine how the hologram needs to be encoded to generate these wavefronts. A suitably encoded hologram can then generate a reconstruction of the three-dimensional scene that can be observed by placing one's eyes at the plane of the observer window and looking through the observer window.
Owner:SEEREAL TECHNOLOGIES
Device for holographic reconstruction of three-dimensional scenes
ActiveUS20060250671A1Reasonable effortLarge cell pitchHolographic light sources/light beam propertiesHolographic optical componentsSpatial light modulatorOptical focusing
A device for holographic reconstruction of three-dimensional scenes includes optical focusing means which directs sufficiently coherent light from light means to the eyes of at least one observer via a spatial light modulator that is encoded with holographic information. The device has a plurality of illumination units for illuminating the surface of the spatial light modulator (SLM); each unit comprises a focusing element (21 / 22 / 23 or 24), and a light means (LS1 / LS2 / LS3 or LS4) that emits sufficiently coherent light such that each of these illumination units illuminates one separate illuminated region (R1 / R2 / R3 or R4) of the surface, whereby the focusing element and the light means are arranged such that the light emitted by the light means (LS1-LS4) coincides close to or at the observer eyes.
Owner:SEEREAL TECHNOLOGIES
Microscope generating a three-dimensional representation of an object and images generated by such a microscope
InactiveUS6525875B1Not possibleHolographic light sources/light beam propertiesMicroscopesObject basedPhase difference
A microscope is disclosed which determines a complex three-dimensional representation of an object based on a series of recordings of the light wave diffracted by the object, wherein the direction of the wave lighting of the object varies between two succesive recordings. The diffracted wave interferes with a reference wave on a receiving surface and a frequency representation of the diffracted wave is computed from interference patterns received on the receiving surface. A plurality of frequency representations of diffracted waves are then superimposed yielding a frequency representation of the object. The phase of each frequency representation of a diffracted wave is shifted in order to compensate for variations of the phase difference between the reference wave and the wave lighting of the object.
Owner:LAUER VINCENT
3D Display Device with Controllable Device for Tracking Visibility Regions
InactiveUS20100289870A1Improve efficiencyTelevision system detailsHolographic light sources/light beam propertiesWaveguideLight source
A 3D display device with controllable device for tracking visibility regions is disclosed, and includes a controllable device for tracking a visibility region, generated by way of superposition of light source images, in a observer plane of the display device. In preferred embodiments, the cladding of a waveguide comprises at least one material with optical properties of an anisotropic liquid, or at least two materials with optical properties of an isotropic liquid; a matrix arrangement of control electrodes defines multiple positions to be generated for local exit points in the cladding of the waveguide at which the total reflection is locally cancelled; and a system controller modifies positions of the output coupling points for superposing the output-coupled light through the lens array to the visibility region by displacing an output coupling point, or by switching off one output coupling point and switching on another one.
Owner:SEEREAL TECHNOLOGIES
Video hologram and device for reconstructing video holograms for large objects
InactiveUS7315408B2Reduce intensityHigh diffractionHolographic light sources/light beam propertiesHolographic object characteristicsComputer graphics (images)Radiology
A video holographic display device operates so that the size of a reconstructed three dimensional scene is a function of the size of the hologram-bearing medium; the reconstructed three dimensional scene can then be anywhere within a volume defined by the hologram-bearing medium and a virtual observer window through which the reconstructed three dimensional scene must be viewed. This contrasts with conventional holograms, in which the size of the reconstructed scene is localised to a far smaller volume and is not a function of the size of the hologram-bearing medium at all.
Owner:SEEREAL TECHNOLOGIES
High Resolution Display
InactiveUS20100149139A1Television system detailsHolographic light sources/light beam propertiesData compressionDisplay device
Disclosed is a high resolution display on which decompressed high resolution image data is displayed, the display including pixels, the pixels being on a substrate, where circuitry is present on the same substrate as the pixels, where compressed high resolution image data which has been compressed using known data compression techniques is received by the circuitry, the circuitry being operable to perform decompression calculations which provide subsequent display of decompressed high resolution image data by the pixels of the display.
Owner:SEEREAL TECHNOLOGIES
Method and device for computing computer-generated video holograms
ActiveUS20060139710A1Reduce processing speedMinimized dimensionHolographic light sources/light beam propertiesHolographic optical componentsData setComputer graphics (images)
The data defining an object to be holographically reconstructed is first arranged into a number of virtual section layers, each layer defining a two-dimensional object data sets, such that a video hologram data set can be calculated from some or all of these two-dimensional object data sets. The first step is to transform each two-dimensional object data set to a two-dimensional wave field distribution. This wave field distribution is calculated for a virtual observer window in a reference layer at a finite distance from the video hologram layer. Next, the calculated two-dimensional wave field distributions for the virtual observer window, for all two-dimensional object data sets of section layers, are added to define an aggregated observer window data set. Then, the aggregated observer window data set is transformed from the reference layer to the video hologram layer, to generate the video hologram data set for the computer-generated video hologram.
Owner:SEEREAL TECHNOLOGIES
Holographic display device comprising magneto-optical spatial light modulator
InactiveUS20110149018A1Minimizes pixel cross talkSoft apertureTelevision system detailsHolographic light sources/light beam propertiesSpatial light modulatorMagneto optical
A holographic display device comprising at least one magneto-optical spatial light modulator (MOSLM). The holographic display device may comprise a first MOSLM and a second MOSLM, the first and second MOSLMs encoding a hologram and a holographic reconstruction being generated by the device. An advantage of the device is fast encoding of holograms.
Owner:SEEREAL TECHNOLOGIES
Holographic Display
ActiveUS20100157399A1Reduce optical effectsHolographic optical componentsDigital holography electronic componentSpatial light modulatorLight beam
Disclosed is a holographic display including a spatial light modulator, and including a position detection and tracking system, such that a viewer's eye positions are tracked, with variable beam deflection to the viewer's eye positions being performed using a microprism array which enables controllable deflection of optical beams.
Owner:SEEREAL TECHNOLOGIES
Holographic display device
ActiveUS20100103485A1Holographic light sources/light beam propertiesHolographic optical componentsParallaxSpatial light modulator
A holographic display comprising light sources (L51, L52, . . . ) in a 2D light source array, lenses (L1, 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=1. An advantage is 2D-encoding with vertical and horizontal focusing and vertical and horizontal motion parallax.
Owner:SEEREAL TECHNOLOGIES
Holographic Projection System with Optical Wave Tracking and with Means for Correcting the Holographic Reconstruction
ActiveUS20100103246A1Reduce the effect of aberrationSmall aberrationTelevision system detailsColor television detailsVisibilityProjection system
A holographic projection system with a display screen and an optical wave tracking means for controlling the direction of propagation of a modulated wave uses a position controller and an eye finder. An extremely wide tracking range is realised in the projection system for simultaneous viewing of the reconstruction by multiple observers, which are situated beside one another. The reconstruction of the scene is reconstructed for each eye position of an observer such that the entire scene is visible in the visibility region in a large tracking range with minimal errors. The projection system reconstructs the scene with the help of modulated partial waves. Projection means direct these partial waves with separately holographically reconstructed segments of the scene at the desired eye position through a structure of screen segments which are at least horizontally staggered on the display screen.
Owner:SEEREAL TECHNOLOGIES
Method and device for encoding and reconstructing computer-generated video holograms
ActiveUS20060050340A1Lower refresh rateAvoids costly heavyHolographic light sources/light beam propertiesHolographic optical componentsLiquid-crystal displayImage resolution
A method and a device for encoding and reconstructing computer-generated video holograms using a conventional LC display: it provides holographic reconstruction of three-dimensional scenes using electronically controllable pixel in a holographic array (3) with a conventional resolution, and is reasonably free from flickering and cross-talk. Reconstruction is in real time, and for both eyes at the same time, over a large viewing zone. The method takes advantage of an optical focusing means (2) in order to image vertically coherent light emitted by a line light source (1) into viewing windows (8R, 8L) after modulation by the pixel array (3). The holographic reconstruction (11) of the scene is rendered visible from viewing windows (8R, 8L) for both eyes of an observer by way of diffraction at the pixels. According to the invention, the controllable pixels are disposed in vertical pixel columns (15, 16), which encode separate holograms of the same scene for each of the viewer's eyes (R, L), where said holograms are one-dimensional in the vertical direction and horizontally interleaved. An image separation means (7) with separating elements arranged parallel to the pixel columns reveals the respective pixel columns (15, 15′ or 16, 16′) for one eye and covers them for the other eye.
Owner:SEEREAL TECHNOLOGIES
Holographic user interfaces for medical procedures
InactiveUS20140282008A1SurgeryHolographic object characteristicsGraphical user interfaceLocalization system
An interactive holographic display system includes a holographic generation module configured to display a holographically rendered anatomical image. A localization system is configured to define a monitored space on or around the holographically rendered anatomical image. One or more monitored objects have their position and orientation monitored by the localization system such that coincidence of spatial points between the monitored space and the one or more monitored objects triggers a response in the holographically rendered anatomical image.
Owner:KONINKLJIJKE PHILIPS NV
Backlight unit for holographic display apparatus and holographic display apparatus including the same
ActiveUS20160147003A1Mechanical apparatusHolographic light sources/light beam propertiesLight guideLight beam
A backlight unit (BLU), for a binocular holographic display apparatus, and the binocular holographic display apparatus including the BLU are provided. The BLU includes: a light source unit that emits coherent illumination light; and a light guide plate that is transparent and includes a light incidence surface onto which the coherent illumination light emitted by the light source unit is incident and a light emission surface through which the illumination light is output. The light source unit includes a beam deflector that adjusts an incidence angle of the illumination light incident onto the light guide plate.
Owner:SAMSUNG ELECTRONICS CO LTD
Analysis and Sorting of Objects in Flow
ActiveUS20140376816A1Fast and efficient sortingImage enhancementImage analysisHolographic imagingMechanical engineering
A device (1) for sorting objects immersed in a flowing medium is described. The device comprises a holographic imaging unit comprising a plurality of holographic imaging elements (2), a fluid handling unit comprising a plurality of microfluidic channels (3) for conducting flowing medium along a corresponding holographic imaging element (2) and comprising a microfluidic switch (5) arranged downstream of an imaging region in the microfluidic channel for controllably directing each object in the flowing medium into a selected one of a plurality of outlets (6). The device also comprises a processing unit (7) adapted for real-time characterization of the holographic diffraction image obtained for each of the objects thereby taking into account at least one predetermined object type signature. The processing unit (7) furthermore is adapted for controlling the microfluidic switch (5) in response to the characterization.
Owner:INTERUNIVERSITAIR MICRO ELECTRONICS CENT (IMEC VZW) +1
Holographic display with a variable beam deflection
ActiveUS8218211B2Reduce optical effectsHolographic optical componentsDigital holography electronic componentSpatial light modulatorLight beam
A holographic display including a spatial light modulator, and including a position detection and tracking system, such that a viewer's eye positions are tracked, with variable beam deflection to the viewer's eye positions being performed using a microprism array which enables controllable deflection of optical beams.
Owner:SEEREAL TECHNOLOGIES
3D content generation system
InactiveUS20100118117A1Facilitate processing contentTelevision system detailsAdvertisementsComputer visionComputer science
A 3D content generation system comprising a content generating party that generates 2D content and sends that content to a remote intermediary. The remote intermediary processes the content to facilitate subsequent holographic reconstruction and sends the processed content to a holographic display device which locally generates a 3D holographic reconstruction of the content. An advantage is that 2D content may be processed remotely to provide 3D holographic content.
Owner:SEEREAL TECHNOLOGIES
Multi-core processor architecture for active autostereoscopic emissive displays
ActiveUS8736675B1Television system detailsHolographic optical componentsGeneral purposeDisplay device
In one implementation, a system includes a multi-core processor and an optical display with a plurality of hogels. Each hogel is configured to radiate light in a plurality of directions, with controllable intensities in each of the plurality of directions. The multi-core processor is coupled to the optical display and configured to control the hogels. The multi-core processor includes at least two cores, an on-chip memory, and a master processor in a single integrated circuit package. The master processor may be a general-purpose on-chip processor, such as a core in the multi-core processor, that is used to coordinated operations of the other cores. Each of the cores is configured to receive hogel data and to generate signals for a corresponding subset of the plurality of hogels.
Owner:3D PATENTS LLC
Method and Device for Computing Computer-Generated Video Holograms
ActiveUS20090290203A1Shorten speedMinimized dimensionHolographic light sources/light beam propertiesHolographic optical componentsData setComputer graphics (images)
The data defining an object to be holographically reconstructed is first arranged into a number of virtual section layers, each layer defining a two-dimensional object data sets, such that a video hologram data set can be calculated from some or all of these two-dimensional object data sets. The first step is to transform each two-dimensional object data set to a two-dimensional wave field distribution. This wave field distribution is calculated for a virtual observer window in a reference layer at a finite distance from the video hologram layer. Next, the calculated two-dimensional wave field distributions for the virtual observer window, for all two-dimensional object data sets of section layers, are added to define an aggregated observer window data set. Then, the aggregated observer window data set is transformed from the reference layer to the video hologram layer, to generate the video hologram data set for the computer-generated video hologram.
Owner:SEEREAL TECHNOLOGIES
Method for encoding video holograms for holographically reconstructing a scene
ActiveUS7400431B2Lower refresh rateAvoids costly heavyHolographic light sources/light beam propertiesHolographic optical componentsImage resolutionDisplay device
Owner:SEEREAL TECHNOLOGIES
Method and Circuit Arrangement for Recognising and Tracking Eyes of Several Observers in Real Time
ActiveUS20080231805A1Reduce data volumeWork efficiently and quicklyImage enhancementImage analysisContact freeDigital video
The invention relates to a method and to a circuit arrangement for recognising and for tracking, in a contact-free manner, eye positions of several users in real time. The input data comprises a sequence of digital video frames. Said method comprises the following steps: combining a face-finder-instance which is used to examine faces, an eye-finder-instance which is used to examine eye areas, and an eye-tracker-instance which is used to recognise and track eye reference points. The aim of the invention is to convert the eye positions within a hierarchical outlet of the instance to the target, which successively restricts the dataset, which is to be processed, emerging from the dataset of the entire video frame (VF) in order to form a face target area (GZ) and subsequently an eye target area (AZ). Also, an instance or a group of instances, which run in a parallel manner, are carried out, respectively, on a calculating unit thereof.
Owner:SEEREAL TECHNOLOGIES
Holographic Display
ActiveUS20100253677A1Reduce the effect of aberrationEasy to viewTelevision system detailsHolographic light sources/light beam propertiesSpatial light modulatorComputer science
Disclosed is a holographic display including a spatial light modulator (SLM) with pixels, the SLM pixels being on a substrate, the SLM including circuitry which is on the same substrate as the SLM pixels, the circuitry operable to perform calculations which provide an encoding of the SLM.
Owner:SEEREAL TECHNOLOGIES
Compact holographic display device
ActiveUS20100046050A1MinimizeMinimize cross-talkHolographic light sources/light beam propertiesHolographic optical componentsComputer scienceHolographic display
Holographic display device comprising a first EASLM and a second EASLM, the pair permitting independent modification of phase and amplitude, in which holographic reconstruction is visible through one or more virtual observer windows. An advantage is that an observer may view a holographic reconstruction through one or more virtual observer windows from a device housing a pair of EASLMs which permit independent modification of phase and amplitude.
Owner:SEEREAL TECHNOLOGIES
Device for holographic reconstruction of three-dimensional scenes
ActiveUS7535607B2Reasonable effortLarge cell pitchHolographic light sources/light beam propertiesHolographic optical componentsSpatial light modulatorOptical focusing
A device for holographic reconstruction of three-dimensional scenes includes optical focusing means which directs sufficiently coherent light from light means to the eyes of at least one observer via a spatial light modulator that is encoded with holographic information. The device has a plurality of illumination units for illuminating the surface of the spatial light modulator (SLM); each unit comprises a focusing element (21 / 22 / 23 or 24), and a light means (LS1 / LS2 / LS3 or LS4) that emits sufficiently coherent light such that each of these illumination units illuminates one separate illuminated region (R1 / R2 / R3 or R4) of the surface, whereby the focusing element and the light means are arranged such that the light emitted by the light means (LS1-LS4) coincides close to or at the observer eyes.
Owner:SEEREAL TECHNOLOGIES
System, apparatus and method for extracting image cross-sections of an object from received electromagnetic radiation
ActiveUS20100060962A1Reduced strengthHolographic optical componentsHolographic object characteristicsElectromagnetic radiationImage capture
An Apparatus and method to produce a hologram of a cross-section of an object includes an electromagnetic radiation assembly configured to receive a received electromagnetic radiation, such as light, from the object. The electromagnetic radiation assembly is further configured to diffract the received electromagnetic radiation and transmit a diffracted electromagnetic radiation An image capture assembly is configure to capture an image of the diffracted electromagnetic radiation and produce the hologram of the cross-section of the object from the captured image. The hologram of the cross-section includes information regarding a single cross-section of the object.
Owner:CELLOPTIC
Video hologram and device for reconstructing video holograms with window at image plane
ActiveUS20060238836A1Reduce intensityHigh diffractionHolographic light sources/light beam propertiesHolographic object characteristicsComputer graphics (images)Radiology
A video holographic display device includes a light source used to illuminate a hologram-bearing medium encoded with a hologram. The device operates so that only when an observer's eyes are positioned approximately at the image plane of the light source can the holographic reconstruction be seen properly. This contrasts with conventional holographic displays, in which the observer's eyes do not have to be at the image plane in order for a holographic reconstruction to be seen.
Owner:SEEREAL TECHNOLOGIES
Video hologram and device for reconstructing video holograms using a fresnel transform
InactiveUS20060238843A1Efficient reconstructionLarge viewing angleHolographic light sources/light beam propertiesHolographic object characteristicsFourier transform on finite groupsDisplay device
A display device generates a holographic reconstruction of a three dimensional scene from a hologram; the device is operable such that the holographic reconstruction is the Fresnel transform of the hologram and not the Fourier transform of the hologram. With a conventional holographic display, at least some of the holographic reconstruction can always be described as the Fourier transform of the hologram.
Owner:SEEREAL TECHNOLOGIES
Display device, in particular a head-mounted display, based on temporal and spatial multiplexing of hologram tiles
ActiveUS9406166B2High resolutionHolographic optical componentsActive addressable light modulatorSpatial light modulatorDisplay device
The invention relates to a display device, in particular a head-mounted display or hocular, having a spatial light modulator and a controllable light-deflecting device for generating a multiple image of the spatial light modulator, which consists of segments, the multiple image being produced at least with a predefinable number of segments which determines the size of a visible area within which a 3D-scene holographically encoded in the spatial light modulator can be reconstructed for observation by an eye of an observer.
Owner:SEEREAL TECHNOLOGIES
Holographic Reconstruction system with a Tracking Device for the Reconstruction
ActiveUS20100149313A1Television system detailsColor television detailsSpatial light modulatorOptical aberration
A holographic reconstruction system having spatial light modulators, an eye finder and a position control orients a propagating spatially modulated light wave field toward at least one eye position of an observer's eye, thereby reconstructing a scene in a three-dimensional manner and tracking the same during a position change of the eye position. Through Unobstructed lateral and axial movement of the observer head to arbitrary eye positions in a tracking region is enabled. The use of additional, planar optical components, which bring about optical aberrations during a position change of observer eyes, are prevented.
Owner:SEEREAL TECHNOLOGIES
Video hologram and device for reconstructing video holograms with time sequential encoding
InactiveUS20060238840A1Reduce intensityHigh diffractionHolographic light sources/light beam propertiesHolographic object characteristicsComputer graphics (images)Radiology
A display device for computer generated holography can time sequentially re-encode a hologram on the hologram-bearing medium for the left and then the right eye of an observer. Conventional holograms do not have to time multiplex for the left and then the right eye because, at any one time, the view seen by the left eye differs from the right eye anyway.
Owner:SEEREAL TECHNOLOGIES
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