Prismatic retroreflective article and method

G - Physics – 02 – B

Patent

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G02B 5/124 (2006.01)

Patent

CA 2588830

A prismatic retroreflective article has a transparent body portion and a layer of internally reflecting cube-corner optical elements having an open air- exposed rear surface at least a portion of which is more hydrophobic, more oleophobic, or both more hydrophobic and more oleophobic than the underlying cube-corner optical element. The article may be made by providing a transparent body portion bearing a layer of internally reflecting open air- exposed cube-corner optical elements; treating or coating at least a portion of the cube-corner elements to make the treated or coated portion more hydrophobic, more oleophobic, or both more hydrophobic and more oleophobic than the underlying cube-corner optical elements; and leaving such treated or coated portion exposed to the open air.

L'invention concerne un article rétroréfléchissant prismatique présentant une partie de corps transparente et une couche d'éléments optiques en coin de cube à réflexion interne présentant une surface arrière exposée à l'air ambiant dont au moins une partie est plus hydrophobe, plus oléophobe, ou plus hydrophobe et plus oléophobe que l'élément optique en coin de cube sous-jacent. La fabrication de l'article peut consister à utiliser une partie de corps transparent portant une couche d'éléments optiques en coin de cube exposés à l'air ambiant à réflexion interne ; à traiter ou à revêtir au moins une partie des éléments en coin de cube afin de rendre la partie traitée ou revêtue plus hydrophobe, plus oléophobe, ou plus hydrophobe et plus oléophobe que les éléments optiques en coin de cube sous-jacents ; et à laisser ladite partie traitée ou revêtue exposée à l'air ambiant.

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