SeeReal Technologies GmbH Patent applications |
Patent application number | Title | Published |
20110304895 | METHOD OF COMPUTING A HOLOGRAM FOR RECONSTRUCTING AN OBJECT USING A DISPLAY DEVICE - A method of computing a hologram for reconstructing an object using a display device is provided. The display device enables a holographic reconstruction of the object. The display device comprises a light source and an optical system to illuminate a hologram-bearing medium being encodable with the hologram. The method comprises the steps of: (a) computing the hologram by determining the wavefronts at an approximate observer eye position that would be generated by a real version of the object to be reconstructed; and (b) encoding the computed hologram in the hologram-bearing medium. | 12-15-2011 |
20110026089 | VIDEO HOLOGRAM AND DEVICE FOR RECONSTRUCTING VIDEO HOLOGRAMS - The invention relates to video holograms and devices for reconstructing video holograms, comprising an optical system having a light source, lens and the video hologram having cells arranged in a matrix or a regular pattern with at least one opening per cell, the phase or amplitude of said opening being controllable. The holographic video representations of expanded spatial objects can be achieved in a wide viewing area in real time using controllable displays, whereby the objects are either computer-generated or created by different means. The space-bandwidth product (SBP) of the hologram is thus reduced to a minimum and the periodicity interval of the Fourier spectrum is used as a viewing window on the inverse transformation plane, through which the object is visible in the preceding space. The mobility of the viewer(s) is achieved by tracking the viewing window. | 02-03-2011 |
20090315983 | IMAGE DISPLAY DEVICE COMPRISING AN IMAGING MATRIX - The invention relates to an image display device comprising an imaging matrix, which consists of imaging elements which are arranged in a lateral manner, for example, lenticulars or a lens array, and a plurality of point elements which are disposed on a object plane and which are formed from the imaging elements in an observation chamber. In order to reduce imaging errors resulting in the image field curvature of the individual imaging elements of a large observation angle, compensation by a correction matrix, which contains a plurality of optical corrections elements, takes place. An optical correction element is associated with each individual optical imaging element. Said invention can be used, for example, in image or video display devices, such as autostereoscopic displays, multi-user-displays with sweet-spot-units and multi-view-displays, in order to image illuminating elements. The invention also relates to displays comprising a sweet-spot-unit, which can be switched for one or more observers into a two-dimensional mode and also in an autostereoscopic mode. | 12-24-2009 |
20090290203 | Method and Device for Computing Computer-Generated Video Holograms - 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. | 11-26-2009 |
20080315442 | Method and Apparatus for Replicating Microstructured Optical Masks - The invention relates to a method and an apparatus for replicating planar, thin-layered, and microstructured flat lens system and optical mask (LM) that are provided with such microstructured lens system which are hardened from a highly viscous transparent fluid on a supporting substrate plate (TP). The fluid is introduced between a plate-shaped master plate (M) and a movable supporting substrate plate and remains joined to said substrate plate after hardening. The inventive method is carried out in a non-rotational manner while the molding space is not delimited by sidewalls or similar in the direction of expansion of the fluid. The inventive flat lens systems or optical masks are embodied as lenticular arrays, field lenses, or Fresnel lenses. The final shape of the mask is homogeneous, has a geometrically accurate layer thickness, and is free from air pockets. The inventive method and apparatus allow for controlled replication at great geometrical accuracy and extremely good optical quality. | 12-25-2008 |
20080278805 | Sweet Spot Unit For a Multi-User Display Device With an Expanded Viewing Zone - The invention relates to a sweet spot unit for multiple user display with an enlarged observation area, preferably for an electronic display for reproducing stereoscopic and/or monoscopic representation which are automatically oriented towards the eyes of different observers by means of a position finder and a tracking and image control system. A said sweet spot unit contains deviation means ( | 11-13-2008 |
20080252950 | Video Hologram and Device for Reconstructing Video Holograms for Large Objects - 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. | 10-16-2008 |
20080247042 | Sweet Spot Beam Splitter for Separating Images - The invention relates to an optical imaging system for separating images, more specifically a sweet spot beam splitter, for an autostereoscopic display, which allows for greater freedom of movement of at least one observer in a lateral direction as well as regarding the distance from the display by expanding sweet spots up to and beyond the size corresponding to the distance between the eyes. The observer can move within said area without losing the 3D impression such that the demands on the positional accuracy and the reaction time of the tracking system are lowered. The inventive sweet spot beam splitter comprises a first lenticular system (L | 10-09-2008 |
20080246753 | Method and Device for Tracking Sweet Spots - The invention relates to a method and device for tracking the sweet spots of a sweets spot unit for a transmissive electronic display. The aim of the invention is to improve the reproduction quality and the uniformity of illumination in displays of this type. The display contains a sweet spot unit consisting of an illumination matrix ( | 10-09-2008 |
20080231805 | Method and Circuit Arrangement for Recognising and Tracking Eyes of Several Observers in Real Time - 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. | 09-25-2008 |
20080212153 | Controllable Illumination Device - The invention relates to a controllable illumination device for an autostereoscopic or holographic display, which illumination device contains an illumination matrix of primary light sources having at least one luminous element per light source and a controllable light modulator (SLM) and a reproduction matrix. A computer-generated hologram (CGH) illuminated by the primary light sources ( | 09-04-2008 |
20080198431 | Projection Device and Method For Holographic Reconstruction of Scenes - The invention relates to a projection device and a method for holographic reconstruction of scenes comprising a light modulator ( | 08-21-2008 |
20080198430 | Method and Device for Encoding and Reconstructing Computer-Generated Video Holograms - 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 ( | 08-21-2008 |