Abstract:
Изобретение относится к области информационных технологий и предназначено для визуализации трехмерных изображений. Техническим результатом является создание электрически управляемых фазовых объемных дифракционных решеток и, на их основе, экранов для отображения объемных цветных изображений. Способ заключается в том, что осуществляют освещение пучком оптического излучения одновременно блока матриц пикселей, в котором матрицы установлены параллельно друг другу, причем освещают матрицы с той же стороны, с какой наблюдают изображение, при этом в качестве изменяемой оптической характеристики пикселей во всех этих матрицах используют показатель преломления. Устройство включает экран, предоставляющий собой многослойную структуру, которая содержит чередующиеся слои материала, обладающего электрооптическим эффектом, и слои прозрачного материала, не обладающего этим эффектом. Все слои материала, обладающего электрооптическим эффектом, электрически изолированы друг от друга и каждый из них выполнен в виде матрицы электрически управляемых элементов-пикселей.
Abstract:
This invention relates to holographic image display systems (200), and to related methods and processor control code. We describe a method of displaying an image holographically, the method comprising: inputting display image data defining said image for display; processing said image data to determine first image data representing a first spatial frequency portion of said image data and second image data (206) representing a second spatial frequency portion of said image data, wherein said second spatial frequency is higher than said first spatial frequency; displaying a hologram (204) of said first image data on a spatial light modulator (SLM1) to form a holographically-generated intermediate real image; onto a second spatial light modulator (SLM2) which modulates the intensity of said intermediate real image using said second image data (206) to display said image.
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:
A method for producing a 3D image includes providing a pixel-by-pixel map over a preselected aperture of relative phases for coherent light scattered by or transmitted through a desired scene. The method includes positioning micro-mirrors of a reconfigurable mirror array to produce reflected light whose wave front has the pixel-by- pixel map over the- preselected aperture in response to the array being illuminated with a coherent light beam. The method includes illuminating the reconfigurable mirror array with the coherent light beam to enable producing a 3D image of the desired scene.
Abstract:
This invention relates to methods and apparatus for displaying images holographically. A method of displaying an image holographically using a spatial lightmodulator (SLM), said SLM having a plurality of SLM pixels, the method comprising: displaying a diffraction pattern on said pixels of said SLM; and illuminating said pixels of said SLM such that light diffracted by said diffraction pattern on said SLM pixels comprises a content of said displayed image, a variation in brightness of said displayed image across said displayed image being modulated by an intensity envelope determined by the diffraction pattern of an individual said pixel, for example a sinc envelope; and wherein the method further comprises moving a peak or centre of gravity of said intensityenvelope away from a zero order spot and towards a centre of said displayed image by imposing a pattern of phase delay across said SLM pixels, said pattern of phase delay repeating at a spatial interval corresponding to a pixel interval of said SLM.
Abstract:
This invention relates to holographic image display systems, and to related methods and processor control code. We describe a method of displaying an image holographically, the method comprising: inputting display image data defining said image for display; processing said image data to determine first image data representing a first spatial frequency portion of said image data and second image data representing a second spatial frequency portion of said image data, wherein said second spatial frequency is higher than said first spatial frequency; displaying a hologram of said first image data on a spatial light modulator (SLM) to form a holographically-generated intermediate real image; modulating said intermediate real image using said second image data to display said image.
Abstract:
This invention relates to methods and apparatus for displaying images holographically. A method of displaying an image holographically using a spatial lightmodulator (SLM), said SLM having a plurality of SLM pixels, the method comprising: displaying a diffraction pattern on said pixels of said SLM; and illuminating said pixels of said SLM such that light diffracted by said diffraction pattern on said SLM pixels comprises a content of said displayed image, a variation in brightness of said displayed image across said displayed image being modulated by an intensity envelope determined by the diffraction pattern of an individual said pixel, for example a sinc envelope; and wherein the method further comprises moving a peak or centre of gravity of said intensityenvelope away from a zero order spot and towards a centre of said displayed image by imposing a pattern of phase delay across said SLM pixels, said pattern of phase delay repeating at a spatial interval corresponding to a pixel interval of said SLM.
Abstract:
A holographic display device (910) comprises a first OLED array (91, 92) writing onto a first OASLM (95-98), the first OLED array and the first OASLM forming adjacent layers, and a second OLED array (906, 907) writing onto a second OASLM (901, 903), the second OLED array and the second OASLM forming adjacent layers. The first and the second OASLMs encode a hologram and a holographic reconstruction is generated by the device when an array of read beams (909) illuminates the first and second OASLMs and the first and second OASLMs are suitably controlled by the first and second OLED arrays. Advantages include that this device permits independent control of phase and amplitude, and the device lends itself to compactness.
Abstract:
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.
Abstract:
Fast processing, at video rates, of information represented in digital holograms is provided to facilitate generating and displaying 3-D holographic images representative of a 3-D object scene on lower-resolution display devices. A holographic generator component (HGC) can receive or generate a hologram representing a 3-D object scene. The HGC can downsample the hologram based on a fix, jitter downsampling lattice, and can interpolate, through pixel duplication, the downsampled hologram to generate a low-resolution hologram that can be displayed with a low-resolution display device. A grating can be overlaid on the display device, wherein the grating can be generated based on the same jitter downsampling lattice used to downsample the hologram. The integration of the grating and low-resolution hologram can facilitate displaying, on lower-resolution display devices, holographic images that can have the resolution, to a desirably good approximation, of the original hologram.