Multilayer body having microlenses

B - Operations – Transporting – 29 – D

Patent

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Details

B29D 11/00 (2006.01) B42D 15/00 (2006.01) B42D 15/10 (2006.01)

Patent

CA 2667100

Disclosed is a multilayer element for displaying microimages that are provided with gray shades or color shades. Said multilayer element comprises a transparent first layer into which a plurality of microlenses are molded, and a second layer (61) that is disposed below the first layer and is fitted with a plurality of microimages. The microlenses are arranged according to a microlens screen. The second layer has a plurality of microimage areas (61 b) which are arranged according to a microimage area screen whose screen width is smaller than 300 µm. Two or more microimages (61 ma to 61 mc) located in a microimage area are different from each other within each microimage area, the raster spaces of the microlens screen and the microimage screen varying by less than 10 percent. The microimages have areas with a grayscale value or a color value. Also disclosed is a method for producing said multilayer element.

L'invention concerne un corps multicouche destiné à représenter des micro-images pourvues de niveaux de gris ou de niveaux de couleurs. Le corps multicouche comporte une première couche transparente dans laquelle est formée une pluralité de micro-lentilles, et une deuxième couche (61) disposée sous la première, contenant une pluralité de micro-images. Les micro-lentilles sont disposées selon une grille de micro-lentilles. La deuxième couche contient une pluralité de zones de micro-images (61b) disposées selon une grille de zones de micro-images dont la largeur de grille est < 300 µm. Dans chaque zone de micro-images, au moins deux micro-images (61ma à 61mc) disposées dans une grille de micro-images se distinguent respectivement l'une de l'autre, les écarts de grille de la grille de micro-lentilles et de la grille de micro-images se distinguant de moins de 10 %. Les micro-images comportent des zones présentant une valeur de gris ou une valeur de couleur. L'invention concerne également un procédé de fabrication du corps multicouche.

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