Optical: systems and elements – Signal reflector – 3-corner retroreflective
Patent
1998-10-19
2000-04-18
Spyrou, Cassandra
Optical: systems and elements
Signal reflector
3-corner retroreflective
359530, 359900, G02B 5122
Patent
active
060506911
ABSTRACT:
Retroreflective cube-corner articles having randomly oriented cube-corner elements exhibiting rotational symmetry and entrance angularity like microsphere-based sheeting but having increased retroreflective efficiency from cube-corners. The inventive sheeting may contain cube-corner elements typically of different cube-corner geometries, different cube-corner dimensions, and different central axis heights. The cube-corner elements are positioned randomly and are typically not adjacent to one another. Also, methods of making such articles are provided.
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Benson Gerald M.
Fellows Benjamin T.
Laird James A.
3M Innovative Properties Company
Cherry Euncha
Jordan Robert H.
Spyrou Cassandra
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