E - Fixed Constructions – 01 – F
Patent
E - Fixed Constructions
01
F
240/151, 240/58
E01F 9/06 (2006.01)
Patent
CA 1096832
747 Comb. ABSTRACT OF THE DISCLOSURE A retroreflector of improved efficiency is disclosed comprising, in one form, a light-transmitting sheet adapted in use to be disposed in an angled position such that a normal to the sheet is at an angle of about 5° to about 85° from an incident beam of light. The sheet has front and back opposed, substantially parallel faces. The front face is substantially smooth and defines a light-refracting surface. The back face has a plurality of light-reflecting units. Each unit comprises three mutually perpendicular surfaces defining a trihedral angle of a rectangular parallelepiped and positioned with respect to the front face that the body diagonal of the rectangular parallelepiped is within an angle of 15° of incident light refracted by the front face. A multi-sided retroreflective body also is disclosed having at least two retroreflective faces adapted to intercept light. Each reflective face is tilted in the same general direction about a lower portion angularly away from a vertical plane and is angularly related in a horizontal plane with respect to another vertical plane disposed substantially at right angles to the direction of such light.
288403
Ferro Corporation
R. William Wray & Associates
LandOfFree
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