Method and device for hologram synthesis

G - Physics – 03 – H

Patent

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G03H 1/08 (2006.01)

Patent

CA 2310851

The invention concerns a method which consists in transforming (E1, E2) a two- dimensional digital image defined by a real function into a complex two- dimensional image (IM2) defined by a complex function, oversampling (E3) the complex image (IM2), simulating (E4) the production of a diffracted image (IM4) resulting from the diffraction of an optical wave by the oversampled image (IM3), and adding (E5) a complex field representing a reference optical wave to the resulting diffracted image (IM4) to produce a hologram. The resulting hologram can be used to produce three-dimensional images or in telecommunications.

Le procédé consiste à transformer (E1, E2) une image bidimensionnelle numérique définie par une fonction réelle en une image bidimensionnelle complexe (IM2) définie par une fonction complexe, suréchantillonner (E3) l'image complexe (IM2), simuler (E4) la production d'une image diffractée (IM4) résultant de la diffraction d'une onde optique par l'image complexe suréchantillonnée (IM3), et additionner (E5) un champ complexe représentatif d'une onde optique de référence à l'image diffractée résultante (IM4) afin de produire un hologramme. L'hologramme ainsi produit peut être utilisé pour produire des images en trois dimensions ou dans les télécommunications.

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