| 摘要 |
There is provided an integral array of retroreflective lenticular elements (1), each of which elements (1) being based on an imaginary, substantially prismatic body of a polygonal cross section and has two convexly curved end surfaces (4, 6), wherein the ratio of the angular range of retroreflection in the elevational plane thereof is predeterminable by the geometry of the cross section. There is also provided an integral array (2) of retroreflective lenticular elements (1) wherein the retroreflective lenticular elements (1) are arrayed in such a way that their convexly curved end surfaces (4, 6) constitute a tesselation pattern, with the major surfaces of the array (2) substantially fully tesselated. |
