发明名称 |
Form birefringent grating structure, viewer, anticounterfeit security device, and method for making the same |
摘要 |
The invention relates to an anticounterfeiting device comprising a form birefringent surface relief structure bearing a colored three-dimensional polarization image. The structure may be composed of pixels whose surface relief microstructure and composition determines the direction and color of zero-order diffracted light visible from each pixel when the structure is illuminated with polarized light and viewed through an analyzer that passes light of the opposite polarization.
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申请公布号 |
US2008204876(A9) |
申请公布日期 |
2008.08.28 |
申请号 |
US20050192205 |
申请日期 |
2005.07.27 |
申请人 |
NEW LIGHT INDUSTRIES, LTD. |
发明人 |
MCGREW STEPHEN P. |
分类号 |
G02B5/30;G02B5/18;G02B27/28 |
主分类号 |
G02B5/30 |
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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