Tiled retroreflective sheeting composed of highly canted...

G - Physics – 02 – B

Patent

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Details

G02B 5/124 (2006.01)

Patent

CA 2294805

A retroreflective sheeting includes a first array of cube corner element opposing pairs and a second array of cube corner element opposing pairs. The symmetry axes of the cube corner elements in the first and second arrays are tilted in a backward direction at an angle of about 12~ to about 30~ from an axis normal to a base surface. The second array of cube corner elements is oriented approximately perpendicular to the first array to yield a retroreflective article providing generally uniform total light return about a 360~ range of orientation angles and/or a minimum total light return of about 5 % across such 360~ range. Also disclosed is a mold assembly suitable for use in forming the present retroreflective sheeting and a method of making a retroreflective article using the mold.

L'invention concerne un revêtement rétroréfléchissant qui comprend un premier ensemble de paires opposées de trièdres trirectangles et un second ensemble de paires opposées de trièdres trirectangles. Les axes de symétrie des trièdres trirectangles se trouvant dans les premier et second ensembles sont inclinés vers l'arrière à un angle compris entre environ 12· et 30· à partir d'un axe normal à une surface de base. Le second ensemble de trièdres trirectangles est orienté environ perpendiculaire par rapport au premier ensemble pour obtenir un article rétroréfléchissant assurant un renvoi total généralement uniforme de lumière sur une plage d'environ 360· d'angles d'orientation et/ou un renvoi total minimal de lumière d'environ 5 % à travers une plage de 360·. Un ensemble moule adapté à être utilisé pour former le revêtement rétroréfléchissant et un procédé de fabrication d'un article rétroréfléchissant utilisant le moule font aussi l'objet de cette invention.

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