G - Physics – 02 – B
Patent
G - Physics
02
B
G02B 5/12 (2006.01) G02B 5/124 (2006.01)
Patent
CA 2536958
Dual axis retroreflective articles that combine dual axis retroreflection and three axis retroreflection to provide a steady glow due to the three axis retroreflective portions of the article and also provide intermittent or flashing retroreflection as the plane of retroreflection from the dual axis retroreflector passes through or near the light source. The retroreflective articles may also include dual axis retroreflective structures in combination with sparkling reflective structures, as well as dual axis retroreflective structures in combination with both three axis retroreflective structures and sparkling reflective structures. In use the autoreflective article 130 is rotated about an axis 129 passing through the surface of article 130 in which facets are located. As the article 130 is rotated planes 120a and 120b of dual axis autoreflection also rotate about axis 129. As a result, the planes 120a and 120b also pass through a light source 124 and an observer 126, thereby providing intermittent retroreflection of light that may be experienced by the observer 126 if the observer is sufficiently close to the light source.
Dreyer John F.
Lightle Vera L.
White Kenneth M.
Minnesota Mining And Manufacturing Company
Smart & Biggar
LandOfFree
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