Patent ID: 8201953
Filing Date: 2012-06-19
Classification: G02B

Abstract:
1. A retroreflection article formed of groups of grooves in three directions having substantially V-shaped cross sections, including a large number of pairs of cube corner retroreflection elements being disposed, the elements in each pair being formed to be rotationally symmetric while sharing one base line forming the retroreflection elements, wherein a group of parallel V-shaped grooves in one direction (grooves x) forming the group of pairs of retroreflection elements has straight-line bottom tracks, the groups of parallel V-shaped grooves in the other two directions (grooves w 1 and w 2 ) have continuous bent-line bottom tracks bent at intersection points with the grooves x, the bottom tracks of the groups of parallel V-shaped grooves in the two directions (grooves w 1 and w 2 ) do not intersect with each other, and projection geometries of base planes (A-B-E 1 -D 1 and A-B-E 2 -D 2 ) forming the retroreflection elements are quadrilaterals.