发明名称 |
SECURITY DEVICE |
摘要 |
A security device comprises a first diffractive structure (3) which generates a first, diffractive image or images (3A-3C) in response to incident radiation; and a second, surface relief and/or printed structure (4), having a coarser resolution than the first diffractive structure (3). The second structure (4) generates or presents a second, non-diffractive image visible in response to incident radiation, wherein the first and second images complement one another and are located relative to one another so as to define a composite representation.
|
申请公布号 |
CA2554149(C) |
申请公布日期 |
2013.10.01 |
申请号 |
CA20052554149 |
申请日期 |
2005.01.19 |
申请人 |
DE LA RUE INTERNATIONAL LIMITED |
发明人 |
STONE, DAVID ALLEN;GLASSPOOL, WENDY VICTORIA;BRATCHLEY, ROBIN |
分类号 |
B42D15/00;B41C1/00;B41C1/02;B41M3/12;B41M3/14 |
主分类号 |
B42D15/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|