Patent ID: 7839548
Filing Date: 2010-11-23
Classification: G03H

Abstract:
1. A method for reconstructing a three-dimensional scene using a reconstruction device including a light source, an optical system and a hologram encoded on a hologram-bearing medium having a matrix of cells; the hologram-bearing medium and the optical system being illuminated by the light source; and the optical system imaging the light source into an image plane of the light source; the method comprising the steps of: (i) the optical system generating an inverse Fourier transform of the hologram encoded on the hologram-bearing medium at the image plane of the light source; (ii) providing a viewing window at the image plane of the light source, the viewing window being the location where an observer places at least one eye to view the holographic reconstruction representing the three-dimensional scene, and, the size of the viewing window being no larger than a single diffraction order of the light diffracted by the hologram-bearing medium; (iii) encoding the hologram on the hologram-bearing medium to reconstruct a given object point of the three-dimensional scene, when seen from the viewing window, in only a limited region of the hologram-bearing medium, so that the inverse Fourier transform in the viewing window is restricted to a single diffraction order of the light diffracted by the hologram-bearing medium; and (iv) forming the holographic reconstruction of the three-dimensional scene from the hologram encoded in the hologram bearing medium within a reconstruction frustum stretching between the hologram-bearing medium and the viewing window.