Patent ID: 7929189
Filing Date: 2011-04-19
Classification: G03H

Abstract:
1. A method of generating a sequence of holograms to be encoded into a hologram-bearing medium of a device comprising an optical system, at least one light source and the hologram-bearing medium having a matrix of cells, the optical system imaging the light source into an image plane of the light source, the method comprising the steps of: (a) selecting a point in the three dimensional scene to be reconstructed; (b) defining an observer window through which the reconstructed three dimensional scene will be seen; the maximal extent of the observer window corresponding to a periodicity interval in the plane of the inverse Fourier transformation of the hologram-bearing medium in the image plane of the light source; (c) tracing a pyramid from the edges of the observer window through the point and onto a region that forms only a portion of a hologram bearing medium; (d) encoding, solely in that region of the hologram-bearing medium, a hologram needed to generate a holographic reconstruction of the point, the region being variable in position and size, the position and the size of the region depending on the location of the point and on the location of the observer window.