Patent ID: 8218212
Filing Date: 2012-07-10
Classification: G03H

Abstract:
1. Device for generating holographic reconstructions with at least one light modulator, comprising: A light source or a light source array comprising multiple light sources, At least one pixelated light modulator, which is illuminated by at least one light source, A first focussing optical element array, where each optical element is assigned to a group of encodable pixels of the light modulator, and where the optical elements image the at least one light source into an image plane behind the light modulator so to form light source images, A second focussing optical element array having optic elements being assigned to the optic elements of the first focussing optical element array and being arranged in a distance of their focal length behind the image plane such that they project the light bundles emanating from them to an eye of a viewer into a viewing region, and A control unit, which is connected to the light modulator, and which computes with the help of programming means the holographic code for the pixelated encoding surface of the light modulator, wherein the light modulator is assigned with a filtering aperture array which has a multitude of apertures, and which is situated near the image plane of the light source images and which forms together with the first focussing optical element array and the second focussing optical element array a 4f-filter-system, and whose apertures in the filtering aperture array are formed such that they let pass a defined region of the diffraction spectrum which has been generated by holographic encoding of the light modulator, said defined region having a size that is smaller than or identical to one diffraction order of the Fourier transform.