Optical: systems and elements – Signal reflector – 3-corner retroreflective
Patent
1997-06-27
1999-03-30
Phan, James
Optical: systems and elements
Signal reflector
3-corner retroreflective
359519, 359522, 359527, 359530, 359533, 359536, 264 19, G02B 5122
Patent
active
058896155
ABSTRACT:
Dual axis retroreflective articles and methods of using them are disclosed. The retroreflective articles may combine dual axis retroreflection with 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. Methods of use include moving the dual axis retroreflective structures to obtain intermittent or flashing retroreflection.
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Dreyer John F.
Lightle Vera L.
White Kenneth M.
Hanson Karl G.
Minnesota Mining and Manufacturing Company
Phan James
Raasch Kevin W.
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