Patent ID: 7513629

Claim:
A retroreflective lens comprising cube corners, wherein the pattern of retroreflection is such that the accumulated coefficient of luminous intensity measured as the R I content of the region (0.4°; 1.0°) is at least four times the R I content of the region (0°; 0.4°), the region (0.4°; 1.0°) being a two-part region having a first trapezoidal part defined by −65°≦ε≦−50° and 0.4°≦α cos ε≦1.0° and a second trapezoidal part defined by −5°≦ε≦45° and 0.4°≦α cos ε≦1.0°, the region (0°; 0.4°) being a two part region having a first triangular part defined by −65°≦ε≦−50° and nα cos ε≦0.4° and a second triangular part defined by −5°≦ε≦45° and 0°≦α a cos ε≦0.4°.