Patent ID: 8218210

Claim:
Method for generating video holograms in real time for a holographic display device with at least one light modulator means on which a scene which is divided into object points is encoded as a complete hologram such that it can be seen as a reconstruction from a visibility region which lies within one periodicity interval of the reconstruction of the video hologram, where the reconstruction of a single object point only requires a subset of the complete hologram encoded on the light modulator means where the position and viewing direction of an observer define a view of the scene, and where the observer is assigned with at least one visibility region, which lies near the eyes, the method comprising the following steps: a) Propagation of the light waves from an object point by transformation into the visibility region in order to obtain a data set of the propagation, said data set being referenced to the visibility region, b) Repetition of the transformation until the entire scene is transformed for visible object points, wherein in order to describe an aggregated wave field of the entire scene for the visibility region the results of the individual transformations are added in a data set, the data set being referenced to the visibility region, c) Back-transformation of the referenced, aggregated data set into complex hologram values video holograms by transformation, where the just determined aggregated data set, which is referenced to the visibility region, is transformed from the visibility region into the hologram plane in which the light modulator means is positioned, wherein for each object point the data set, which is referenced to the propagation of the light waves into the visibility region, can be retrieved from at least one look-up table.