Computer-assisted holographic method and device

Details Computer-assisted holographic method and device Computer-assisted holographic method and device

G - Physics

03

H

G03H 1/08 (2006.01) G03H 1/26 (2006.01)

Patent

CA 2311567

The invention concerns a method which consists in computing (E1-E4), in a three-dimensional geometric space, a set of two-dimensional images representing a virtual object from different respective viewpoints. The virtual object is represented by digital data stored in a computer. The holograms are computed (E5-E6) for the two-dimensional images respectively by a complex transform, such as a Fourier transform technique. The holograms are then juxtaposed (E7) to form a digital hologram of the object, which is physically reproduced (E8) by a light spatial modulator. By illuminating the light spatial modulator with a coherent source, a three-dimensional image of the object is obtained.

Le procédé consiste à calculer (E1-E4), dans un espace géométrique à trois dimensions, un ensemble d'images bidimensionnelles représentatives d'un objet virtuel selon des points de vue respectifs différents. L'objet virtuel est représenté par des données numériques stockées dans un ordinateur. Des hologrammes sont calculés (E5-E6) pour respectivement les images bidimensionnelles selon une technique de transformation rapide complexe, telle qu'une technique de transformation de Fourier. Les hologrammes sont ensuite juxtaposés (E7) pour former un hologramme numérique de l'objet, qui est reproduit (E8) physiquement par un modulateur spatial de lumière. En éclairant le modulateur spatial de lumière par une source cohérente, une image en trois dimensions de l'objet est alors obtenue.

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