Article exhibiting dry and wet retroreflectivity

Details Article exhibiting dry and wet retroreflectivity Article exhibiting dry and wet retroreflectivity

G - Physics

02

B

G02B 5/128 (2006.01) E01F 9/00 (2006.01) E01F 9/04 (2006.01)

Patent

CA 2388295

An exposed-lens retroreflective article (10) exhibiting retroreflection under dry and wet conditions is provided. The inventive article comprises a first set of optical elements (12) having a first reflective layer (14) disposed on the embedded portion of the elements. The first set contributes mainly to dry retroreflection. The article further comprises a second set of optical elements (22) having a second reflective layer (24) behind a spacing layer (26). The second set contributes mainly to wet retroreflection. In one embodiment, the first and second sets of optical elements have substantially the same average diameters, refractive index, and density.

La présente invention concerne un produit rétroréfléchissant à lentille apparente (10) présentant une rétroréflexion dans des conditions sèches et humides. Le produit de l'invention comprend un premier ensemble d'éléments optiques (12) présentant sur leur partie encastrée une première couche réfléchissante (14). Le premier ensemble sert principalement à la rétroréflexion sèche. Le produit comprend également un second ensemble d'éléments optiques (22) présentant une seconde couche réfléchissante (24) se trouvant en-dessous d'une couche de séparation (26). Le second ensemble sert principalement à la rétroréflexion humide. Dans un mode de réalisation, les premier et second ensembles d'éléments optiques ont essentiellement les mêmes diamètres moyens, indices de réfraction, et masses volumiques.

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