发明授权
- 专利标题: Diffractive surfaces with color shifting backgrounds
- 专利标题(中): 具有色移背景的衍射面
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申请号: US09351102申请日: 1999-07-08
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公开(公告)号: US06761959B1公开(公告)日: 2004-07-13
- 发明人: Richard L. Bonkowski , Patrick K. Higgins , Charles T. Markantes , Roger W. Phillips
- 申请人: Richard L. Bonkowski , Patrick K. Higgins , Charles T. Markantes , Roger W. Phillips
- 主分类号: G02B528
- IPC分类号: G02B528
摘要:
A security article includes a light transmissive substrate having a first surface and an opposing second surface, with the first surface having an embossed region with an optical diffraction pattern or a holographic image pattern. A color shifting optical coating is formed on the substrate such as on the opposing second surface, with the optical coating providing an observable color shift as the angle of incident light or viewing angle changes. The security article can be used in a variety of applications and products to provide for enhanced security measures such as anticounterfeiting.
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