A method for generating computer-generated video holograms in real time by means of propagation

摘要

A method for generating computer-generated video holograms in real time, wherein from image data with depth information hologram values to the representation of a three-dimensional, by means of object points (p) structured scene (s) on a spatial-light modulator- (slm) are coded in such a way that those wave front, which would transmit an object, in one or more virtual viewing window (ow) can also be reconstructed and the reconstruction of an individual object point (p), only a partial hologram becomes (th) as a partial quantity of the slm requires, wherein the position of the viewer (o) and the viewing direction a view of the scene (s) is fixed at least one and the observer in a viewing plane (op) near the eye virtual viewing window (ow) is assigned and according to a three-dimensional discretization of the scene (s) in the visible region of the object points (p), the method comprises the steps of:a) propagating the from an object point (p), which light waves in the viewing window (ow) by means of transformation, wherein for each object point (p), the contributions to the propagation of the light waves in the viewing window (ow) are determined from the look-up table;b) repeating the transformation, to for all object points of the entire scene (s) is transformed, and the results of the individual transformations for the description of a common wave field of the overall scene (s) for the viewing window (ow) in a to the viewer''s plane (op) are added to the reference data record;c) inverse transforming by transforming of the added data from the viewing plane (op) in a finite away from and parallel hologram plane at the location of a spatial light modulator (slm) to form complex hologram data of the video hologram.