Holographic or diffraction devices

Details Holographic or diffraction devices Holographic or diffraction devices

G - Physics

07

D

G07D 7/12 (2006.01) B41M 3/14 (2006.01) B42D 15/10 (2006.01) G03H 1/04 (2006.01) G07D 7/14 (2006.01)

Patent

CA 2539294

A holographic or diffraction device responsive to interrogation, the device comprising an image-former and an image-concealer; wherein the image-former is adapted such that light reflected from or transmitted through it forms at least one image; wherein the image-concealer acts to attenuate the image; and wherein the attenuation of the image by the image-concealer is alterable responsive to interrogation.

L'invention concerne un dispositif de diffraction ou holographique sensible à une interrogation, le dispositif comprenant un moyen de formation d'images et un moyen de masquage d'images ; le moyen de formation d'images étant conçu de telle sorte que la lumière réfléchie par ou transmise à travers ledit système forme au moins une image ; le moyen de masquage d'images servant à atténuer l'image ; l'atténuation de l'image par le moyen de masquage d'images étant modifiable en réponse à une interrogation.

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