Patent ID: 8511840
Filing Date: 2013-08-20
Classification: G02B

Abstract:
1. A retroreflective article having a set of a large number of hexagonal cube corner retroreflective elements, the retroreflective article comprising: a hexagonal cube corner retroreflective element having three quadrilateral reflective lateral faces (face a, face b, and face c), each of the quadrilateral reflective lateral faces sharing three edge lines (HD, HE, and HF) and one apex (H) with each other and being defined by six outer circumferential edges (AE, EC, CD, DB, BF, and FA), the hexagonal cube corner retroreflective element having an optical axis passing through the apex (H) and located at an equal distance from the three reflective lateral faces (face a, face b, and face c), wherein at least one of said reflective lateral faces is divided into a pair of secondary reflective lateral faces comprising an upper secondary reflective lateral face (face a the upper and lower secondary reflective lateral faces comprising the pair of secondary reflective lateral faces are not coplanar.