Glittering cube-corner article

G - Physics – 02 – B

Patent

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G02B 5/124 (2006.01)

Patent

CA 2252613

A glittering non-reflective sheeting (60) includes an array of cube-corner elements (30) that are arranged in the array such that the sheeting glitters when light is incident thereon. The glitter is in the form of many discrete points of light (68) that tend to blink off and on. The array may be configured such that a dihedral angle .alpha. varies between adjacent cube faces (31) of adjacent cube-corner elements (30) in each groove in one of the groove sets (45, 46, or 47) and such that the base planes (36) are not parallel to each other when the sheeting (60) is laid flat. Preferably, the dihedral angle .alpha. between faces (31) of adjacent cube-corner elements (30) varies in essentially all of the grooves such that the cube-corner elements are randomly tilted throughout the array. The glitter can make the sheeting very useful for aesthetic or decorative applications.

Selon l'invention, une feuille non réfléchissante (60) scintillante comprend une matrice de trièdres trirectangles (30) disposés, pour former cette matrice, de sorte que la feuille scintille lorsqu'elle est frappée par la lumière. Le scintillement se produit sous la forme de nombreux points de lumière (68) séparés qui tendent à clignoter. Ladite matrice peut être configurée de sorte qu'un angle dièdre .alpha. varie entre deux faces (31) adjacentes de trièdres trirectangles adjacents (30) dans chaque rainure ou dans l'une des ensembles de rainures (45, 46 ou 47) et de sorte que les plans de base (36) ne soient pas parallèles les uns par rapport aux autres lorsque la feuille (60) est posée à plat. De préférence, l'angle dièdre .alpha. formé par les faces (31) de trièdres trirectangles (30) adjacents varient dans pratiquement toutes les rainures de sorte que les trièdres trirectangles sont inclinés de façon aléatoire sur toute la matrice. Le scintillement peut rendre la feuille très utile pour des applications d'ordre esthétique ou décoratif.

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