Method and Apparatus for Reconstructing a Three-Dimensional Scene in a Holographic Display
First Claim
1. 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, whereinA first processor elementGenerates 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, andSimultaneously 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, andA 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.
1 Assignment
0 Petitions
Accused Products
Abstract
A method is disclosed for reconstructing a three-dimensional scene in a holographic display. A 3D scene that is to be reconstructed is decomposed into object points, and one respective object point is encoded as a sub-hologram in the light modulator. Processor means and reconstruction means are provided for calculating and encoding as well as for reconstructing the 3D scene in order to overcome known drawbacks encountered when encoding a hologram and holographically reconstructing the 3D scene in holographic display devices. Processor elements are provided for generating a movable two-dimensional grid in the light modulating means, forming groups of object points from grid-related object points, and sequentially encoding the holograms of said groups of object points, by means of which intrinsically coherent partial constructions of the groups of object points are generated in a rapid sequence, said partial constructions being incoherent relative to one another.
18 Citations
38 Claims
-
1. 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.
-
4-5. -5. (canceled)
-
11. (canceled)
-
16. (canceled)
-
25. (canceled)
-
30. (canceled)
Specification