Method and Apparatus for Reconstructing a Three-Dimensional Scene in a Holographic Display

Method for reconstructing a three-dimensional scene in a holographic display,

• where the three-dimensional scene (3D scene) is divided into individual object points, where each object point is encoded as a sub-hologram on a spatial light modulator means, which is illuminated with sufficiently coherent light by light sources of an illumination system,
• where the 3D scene is reconstructed within a reconstruction space, which stretches between a visibility region and a screen, from reconstructed wave fronts of the object points, where the reconstruction is visible for at least one observer eye in a position which is situated in the visibility region,
• and where a processor comprises processor elements for computing and encoding the 3D scene, wherein
• A first processor element
• Generates on the light modulator means a displaceable, two-dimensional grid with regularly arranged grid cells for encoding the sub-holograms,
• Selects object points depending on the set positions of the grid cells and aggregates them to form object point groups, and
• Simultaneously computes the sub-holograms of the object points of a generated object point group and simultaneously encodes them as a common hologram of the object point group in a separate grid cell on the light modulator means, where the common holograms of all object point groups are encoded sequentially, and
• A second processor element controls the illumination system in synchronism with the displacement of the grid on the light modulator means such that intrinsically coherent but mutually incoherent partial reconstructions of the object point groups are generated from the multitude of sequentially encoded holograms at a fast pace and superposed sequentially in the visibility region.