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    • 10. 发明授权
    • Counterfeit-proof volume hologram multilayer structure, and counterfeit-proof volume hologram seal
    • 防伪体积全息图多层结构,防伪体积全息图密封
    • US06852397B2
    • 2005-02-08
    • US10288234
    • 2002-11-04
    • Tetsuya ToshineKenji Ueda
    • Tetsuya ToshineKenji Ueda
    • G03H1/04G09F3/02B32B5/16G02B5/32
    • G03H1/0248G03H1/0011G03H1/0256G03H2240/54G03H2250/12G03H2250/34G03H2260/30G09F3/0292Y10T428/24942Y10T428/25
    • The present invention relates to a counterfeit-proof volume hologram multilayer structure capable of securely preventing a counterfeiter from replicating a volume hologram recorded therein. The multilayer structure comprises a transparent surface protective layer, a volume hologram layer, and an adhesive layer which are sequentially laminated and is characterized in that particles having particle diameter of 350 nm or more are dispersed in at least one of the transparent surface protective layer, the volume hologram layer, and the adhesive layer and that the refractive index ratio (nF/nB) is set to be not less than 1.05 or not greater than 0.95, wherein nF is the refractive index of the particles and nB is the refractive index of the medium in which the particles are dispersed, or characterized in that at least either the refractive index ratio (nP/nH) between the transparent surface protective layer and the volume hologram layer or the refractive index ratio (nH/nA) between the volume hologram layer and the adhesive layer is set to be not less than 1.08, wherein nP is the refractive index of the transparent surface protective layer, nH is the refractive index of the volume hologram layer, and nA is the refractive index of the adhesive layer.
    • 本发明涉及一种防伪体积全息图多层结构,能够可靠地防止伪造者复制其中记录的体积全息图。 多层结构包括依次层叠的透明表面保护层,体积全息图层和粘合剂层,其特征在于粒径为350nm以上的粒子分散在至少一个透明表面保护层, 体积全息图层和粘合剂层,并且折射率比(nF / nB)设定为不小于1.05或不大于0.95,其中nF是颗粒的折射率,nB是折射率 其中颗粒分散的介质,或其特征在于,透明表面保护层和体积全息图层之间的折射率比(nP / nH)或体积全息图之间的折射率(nH / nA) 层和粘合层设定为不小于1.08,其中nP是透明表面保护层的折射率,nH是volu的折射率 我的全息图层,nA是粘合剂层的折射率。