Multi-orientation retroreflective structure

Details Multi-orientation retroreflective structure Multi-orientation retroreflective structure

1997-12-01

2000-03-14

Phan, James

Optical: systems and elements

Signal reflector

3-corner retroreflective

359530, G02B 5122

Patent

active

060363223

ABSTRACT:
A retroreflective structure is disclosed that has cube corner retroreflective elements. The structure includes a first array of retroreflective elements oriented in a first direction within a plane and a second array of retroreflective elements oriented in a second direction within the plane, wherein said second direction being about 90.degree. to said first direction. The structure further includes a third array of retroreflective elements oriented in a third direction within the plane, wherein said third direction being about 180.degree. to said first direction and a fourth array of retroreflective elements oriented in a fourth direction being about 270.degree. to said first direction. In one embodiment, the retroreflective structure includes the retroreflective elements having cube corner elements having a pitch between elements in the range of between about 0.0035 and 0.0045 inches (0.088 and 0.114 millimeters). In a preferred embodiment, the retroreflective structure includes a metalized layer on the facet side of the retroreflective elements for specular reflection, and the retroreflective elements are tilted by about -3 degrees.

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