发明名称 |
Color shifting retroreflector and method of making same |
摘要 |
Color shifting retroreflective articles can provide features such as decorative effects, evidence of tampering, security authentication or positional information. In some embodiments, the color shifting retroreflective article includes a layer of microspheres, and a reflective coating that is disposed in optical association with the layer of microspheres. The reflective coating includes a spacer layer disposed between a semitransparent first reflective layer and a second reflective layer. The first reflective layer includes a reflective layer disposed adjacent the layer of microspheres. At least one layer of the reflective coating includes a non-uniform thickness associated with each of a plurality of microspheres such that light incident on the article from a first direction is retroreflected at a first color and light incident on the article from a second direction is retroreflected at a second color visibly different from the first color.
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申请公布号 |
US2005162742(A1) |
申请公布日期 |
2005.07.28 |
申请号 |
US20040024201 |
申请日期 |
2004.12.28 |
申请人 |
FLEMING ROBERT J.;LYONS CHRISTOPHER S.;MCGRATH JOSEPH M.;RAMOS JESUS;ROEHRIG MARK A.;BRIGHT CLARK I. |
发明人 |
FLEMING ROBERT J.;LYONS CHRISTOPHER S.;MCGRATH JOSEPH M.;RAMOS JESUS;ROEHRIG MARK A.;BRIGHT CLARK I. |
分类号 |
G02B5/128;(IPC1-7):G02B5/124 |
主分类号 |
G02B5/128 |
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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