Biased lenticular sign system

Details Biased lenticular sign system Biased lenticular sign system

G - Physics

09

F

G09F 7/00 (2006.01) G02B 3/00 (2006.01) G02B 5/124 (2006.01) G02B 5/126 (2006.01) G09F 19/16 (2006.01)

Patent

CA 2101643

A highway sign (10) includes a reflective back surface (20) and a biased lenticular lens (18) front sur- face for reflecting light (22) back in the direction of the original light source (16). The reflective back sur- face (20) preferably comprises a plurality of corner cubic reflectors (20a, 20b, 20c, 20d) arranged in a regular matrix. The biased lenticu- lar lens (18) front surface comprises arcuate surfaces (18a, 18c), or flat surfaces (117a) having arcuate in- dentations (117b, 118, 119; 120, 121); separated by relatively flat sur- faces (18b) which are substantially perpendicular to the plane of the reflective surface (20) and which form a saw-toothed pattern when seen in profile. Printing can be ap- plied to the lens surface to form traffic control messages or indicia (11). The biased lenticular (18) front surface diffuses the oncoming light, thus providing a uniform reflective surface. The reflective surface (20) and biased lenticular lens system (18) can be formed from a single integrated sheet of poly- carbonate plastic or similar material. The sign (10) is relatively inexpensive to manufacture, substantially waterproof and effective in reflecting light back in the direction of an oncoming automobile.

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