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    Reflective article with concealed retroreflective pattern
    65.
    发明授权
    Reflective article with concealed retroreflective pattern 失效
    具有隐蔽反光图案的反光制品

    公开(公告)号：US6024455A

    公开(公告)日：2000-02-15

    申请号：US6292

    申请日：1998-01-13

    申请人： Mark O'Neill ,  Michael F. Weber ,  Olester Benson, Jr. ,  John A. Wheatley ,  James M. Jonza ,  Gary B. Hanson

    发明人： Mark O'Neill ,  Michael F. Weber ,  Olester Benson, Jr. ,  John A. Wheatley ,  James M. Jonza ,  Gary B. Hanson

    IPC分类号： G02B5/124 ,  G02B5/128 ,  G02B5/26

    CPC分类号： G02B5/124

    摘要： A reflective article has a multilayer film covering a patterned retroreflective layer. In one embodiment the patterned retroreflective layer includes a separate indicia layer covering a retroreflective substrate. The indicia are substantially hidden under normal viewing conditions but easily detectable under retroreflective lighting conditions. Various types of retroreflective layers are disclosed. The article can also include microstructured relief patterns which produce holographic images under ambient lighting but which disappear under retroreflective conditions. The multilayer film includes alternating layers of at least a first and second polymer, and has a relatively high reflectivity for normally incident light within a first spectral range which is approximately coextensive with the visible spectrum, and a relatively low reflectance for normally incident light within a second spectral range. The second spectral range can include a transmission window of 15% or less fractional bandwidth located at least partially in the visible spectrum. Film constructions are disclosed which achieve sharper spectral transitions than previously attainable. Film constructions are also disclosed which preserve such sharp transitions even at high entrance (tilt) angles.

    摘要翻译： 反射制品具有覆盖图案化的反光层的多层膜。 在一个实施例中，图案化的反光层包括覆盖回射衬底的单独标记层。 标记在正常观察条件下基本隐藏，但在回射照明条件下容易检测。 公开了各种类型的回射层。 该文章还可以包括在环境照明下产生全息图像但在回射条件下消失的微结构化浮雕图案。 多层膜包括至少第一和第二聚合物的交替层，并且对于在与可见光谱近似共同的第一光谱范围内的正常入射光具有相对较高的反射率，以及在可见光谱内的正常入射光的相对较低的反射率 第二光谱范围。 第二光谱范围可以包括至少部分地位于可见光谱中的15％或更小的分数带宽的透射窗口。 公开了薄膜结构，其实现比先前可获得的更清晰的光谱转变。 还公开了即使在高入口（倾斜）角度下保持这种尖锐转变的膜结构。