Projection device for the holographic reconstruction of scenes

G - Physics – 03 – H

Patent

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Details

G03H 1/22 (2006.01) G02B 27/00 (2006.01)

Patent

CA 2637751

The invention relates to a projection device (1) for the holographic reconstruction of scenes, said projection device comprising at least one light modulation device (2, 2R, 2G, 2B) and at least one light source (4) having a sufficient amount of coherent light for generating a wavefront (8, 8R, 8G, 8B, 8L) of a scene, encoded in the light modulation device. Reproduction means (6) are used to reproduce a Fourier transformation (FT) of the light from the light source (4), modulated by the light modulation device (2, 2R, 2G, 2B), onto a screen (7). In the same way, the wavefront (8, 8R, 8G, 8B, 8L) encoded on the light modulation device (2, 2R, 2G, 2B) is represented by means of the reproduction means (6) in at least one virtual observation window (11, 11R, 11L, 24R, 24L, 28R, 28L) of an observation plane (12). In order to pan the observation window (11, 11R, 11L, 24R, 24L, 28R, 28L) according to a change in the eye position of at least one observer, at least one deflection means (18) is arranged between the light modulation device (2, 2R, 2G, 2B) and the screen (7).

Dispositif de projection (1) pour la reconstruction holographique de scènes, qui comporte au moins un dispositif de modulation de lumière (2, 2R, 2G, 2B) et au moins une source de lumière (4) avec suffisamment de lumière cohérente pour produire un front d'onde codé (8, 8R, 8G, 8B, 8L) d'une scène dans le dispositif de modulation de lumière (2, 2R, 2G, 2B). Une transformée de Fourier (FT) de la lumière émise par la source de lumière (4) et modulée par le dispositif de modulation de lumière (2, 2R, 2G, 2B) est reproduite sur un écran (7) à l'aide de moyens de reproduction (6). Le front d'onde codé (8, 8R, 8G, 8B, 8L) sur le dispositif de modulation de lumière (2, 2R, 2G, 2B) est également reproduit à l'aide des moyens de reproduction (6) dans au moins une fenêtre d'observation virtuelle (11, 11R, 11L, 24R, 24L, 28R, 28L) d'un plan d'observation (12). Pour guider la fenêtre d'observation (11, 11R, 11L, 24R, 24L, 28R, 28L) en fonction de la modification de la position de l'oeil d'au moins un observateur, au moins un moyen déflecteur (18) est placé entre le dispositif de modulation de lumière (2, 2R, 2G, 2B) et l'écran (7).

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