发明名称 |
Retroreflective articles having moire-like pattern |
摘要 |
The invention relates to articles comprising a sheeting having a microstructured surface that reflects light in a moiré-like pattern. The invention further relates to methods of making a master and replicas thereof including tooling that results in sheeting having such pattern. A preferred method comprises forming V-shaped grooves in a substrate (e.g. metal plate) wherein the intersections of three grooves form cube-corner elements. The cube-corner elements are formed in such a manner that adjacent parallel grooves have substantially the same groove spacing and groove depth throughout the array. The master as well as corresponding tooling and sheeting preferably have a groove spacing within the range of about 0.0005 inches (0.0127 mm) to about 0.007 inches (0.1778 mm) throughout the array and more preferably a groove spacing of less than about 0.004 inches (0.1016 mm).
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申请公布号 |
US2003227683(A1) |
申请公布日期 |
2003.12.11 |
申请号 |
US20020167091 |
申请日期 |
2002.06.11 |
申请人 |
3M INNOVATIVE PROPERTIES COMPANY |
发明人 |
SEWALL NELSON D.;SMITH KENNETH L.;MEITZ DAVID W.;FLEMING MADELEINE B.;NELSON JOHN C. |
分类号 |
G02B5/124;G02B27/60;(IPC1-7):G02B5/122 |
主分类号 |
G02B5/124 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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