Retroreflective article
First Claim
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1. A retroreflective article comprising a flat front surface and a structured rear surface, the structured rear surface comprising:
- a continuous arrangement of three triangles, wherein the three triangles are mutually perpendicular and comprise one common point, three common edges, and three uncommon edges, wherein each common edge is shared by two triangles, and wherein each uncommon edge belongs to only one triangle; and
a continuous arrangement of trigonal linear prisms, wherein each trigonal linear prism is disposed along one of the uncommon edges, each trigonal linear prism having a first surface and a second surface which define an apex edge, a first base edge, and a second base edge, wherein the first surface and the second surface of each trigonal linear prism are tilted relative to the flat front surface of the retroreflective article, wherein a polyhedron optical axis extending from the common point to the front surface of the retroreflective article is tilted by −
15°
to 15°
to an axis normal to the front surface of the retroreflective article, wherein angles between the polyhedron optical axis and a surface of each of the three triangles are the same.
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Abstract
A retroreflective article includes a flat front surface, and a structured rear surface displaced from the flat front surface. The structured rear surface is provided with arrays of sets of three mutually perpendicular lateral triangular sides, and a plurality of trigonal linear prisms. The three lateral triangular sides have a common apex and uncommon linear base edges. The linear prisms are disposed along at least one of the linear base edges of the three lateral triangular sides.
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Citations
22 Claims
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1. A retroreflective article comprising a flat front surface and a structured rear surface, the structured rear surface comprising:
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a continuous arrangement of three triangles, wherein the three triangles are mutually perpendicular and comprise one common point, three common edges, and three uncommon edges, wherein each common edge is shared by two triangles, and wherein each uncommon edge belongs to only one triangle; and
a continuous arrangement of trigonal linear prisms, wherein each trigonal linear prism is disposed along one of the uncommon edges, each trigonal linear prism having a first surface and a second surface which define an apex edge, a first base edge, and a second base edge, wherein the first surface and the second surface of each trigonal linear prism are tilted relative to the flat front surface of the retroreflective article, wherein a polyhedron optical axis extending from the common point to the front surface of the retroreflective article is tilted by −
15°
to 15°
to an axis normal to the front surface of the retroreflective article, wherein angles between the polyhedron optical axis and a surface of each of the three triangles are the same. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A retroreflective article comprising a flat front surface and a structured rear surface, the structured rear surface comprising:
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a continuous arrangement of three triangles, wherein the three triangles are mutually perpendicular and comprise one common point, three common edges, and three uncommon edges, wherein each common edge is shared by two triangles, and wherein each uncommon edge belongs to only one triangle; and
a continuous arrangement of trigonal linear prisms, wherein each trigonal linear prism is disposed along one of the uncommon edges, each trigonal linear prism having a first surface and a second surface which define an apex edge, a first base edge, and a second base edge, wherein the first surface and the second surface of each trigonal linear prism are tilted relative to the flat front surface of the retroreflective article, wherein the uncommon edges among the sides of the three triangles lie in a common plane or different planes, and wherein a polyhedron optical axis extending from the common point to the front surface of the retroreflective article is tilted by −
15°
to 15°
to an axis normal to the front surface of the retroreflective article, wherein angles between the polyhedron optical axis and a surface of each of the three triangles are the same. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification