Optical: systems and elements – Signal reflector – 3-corner retroreflective
Patent
1996-04-19
1998-02-24
Phan, James
Optical: systems and elements
Signal reflector
3-corner retroreflective
359900, 409131, G02B 5124
Patent
active
057216401
ABSTRACT:
A retroreflective cube corner article which is a replica of a directly machined substrate comprises a plurality of single cube corner elements which are machined in the substrate. Each cube corner element is bounded by at least one groove from each of three sets of parallel grooves in the substrate so that the article comprises a plurality of different geometric structures.
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Benson Gerald M.
Smith Kenneth L.
Caven Jed W.
Jensen Stephen C.
Jordan Robert H.
Minnesota Mining and Manufacturing Company
Phan James
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