Patent ID: 7950813
Filing Date: 2011-05-31
Classification: G02B

Abstract:
1. Triangular-pyramidal cube-corner retroreflective sheeting or retroreflective article, comprising: composite cube-corner retroreflective elements comprising groups of at least two sub-reflective elements, said two sub-reflective elements each comprising triangular-pyramidal cube-corner retroreflective elements having a diffraction effect and being defined by three lateral faces mutually crossing at approximately right angles, as configured by three-directional V-shaped parallel groove groups having substantially symmetrical sections and intersecting with each other, and which are arrayed in the closest-packed state, projecting on one side of their common sub-plane (SH-SH), each of said groups of sub-reflective elements being disposed on one main reflective element comprising a triangular-pyramidal retroreflective element which is defined by three lateral faces mutually crossing at approximately right angles, as being configured by three-directional V-shaped parallel groove groups having substantially symmetrical sections and intersecting with each other, and which is disposed on the main plane (S-S), wherein among the three-directional base lines forming the main reflective elements and the other three-directional base lines forming the sub-reflective elements, no set of the base lines in any of the directions are parallel.