Optical: systems and elements – Signal reflector – 3-corner retroreflective
Patent
1997-03-14
1999-11-23
Phan, James
Optical: systems and elements
Signal reflector
3-corner retroreflective
359529, 359900, 264 19, G02B 5124
Patent
active
059888202
ABSTRACT:
A retroreflective article 10 has a body portion 14 and a multitude of cube-corner elements 12 that project from a rear side 20 of the body portion 14. The body portion 14 includes a body layer 18 that contains a light-transmissible polymeric material having an elastic modulus less than 7.times.10.sup.8 pascals. The cube-corner elements 12 contain a light transmissible polymeric material having an elastic modulus greater than 16.times.10.sup.8 pascals. A retroreflective article of this construction can be highly flexed while maintaining good retroreflective performance.
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Coderre James C.
Huang Tzu-Li J.
Smith Kenneth L.
3M Innovative Properties Company
Hanson Karl G.
Jensen Stephen C.
Phan James
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