公开(公告)号：US6157486A

公开(公告)日：2000-12-05

申请号：US006579

申请日：1998-01-13

申请人： Olester Benson, Jr. ,  Michael F. Weber ,  John A. Wheatley ,  Andrew J. Ouderkirk ,  Benjamin T. Fellows ,  Wilson C. Garland ,  Mel Y. Wong

发明人： Olester Benson, Jr. ,  Michael F. Weber ,  John A. Wheatley ,  Andrew J. Ouderkirk ,  Benjamin T. Fellows ,  Wilson C. Garland ,  Mel Y. Wong

IPC分类号： G02B5/124 ,  G02B5/128 ,  G02B5/26 ,  G02B5/28 ,  G02B5/30

CPC分类号： G02B5/287 ,  G02B5/124 ,  G02B5/128

摘要： Various combinations of retroreflective sheeting and multilayer polymeric reflective films are disclosed. The reflective film includes alternating layers of at least a first and second polymer, the alternating layers being configured to exhibit a high reflectance for light within a first spectral range and a low reflectance for light within a second spectral range. At least two of the alternating layers can have out-of-plane indices of refraction which differ by no more than 50% of the maximum in-plane refractive index difference. The polymeric layers can define optical repeating units arranged in a sequence to have a specific thickness profile designed to give sharpened spectral transitions. The retroreflective layer preferably exhibits retroreflectance in all planes of incidence, but alternately it can be retroreflective in at least one plane of incidence but not in at least one other plane of incidence.

摘要翻译： 公开了反光片和多层聚合物反射膜的各种组合。 反射膜包括至少第一和第二聚合物的交替层，交替层被配置为对第一光谱范围内的光呈现高反射率，并且对第二光谱范围内的光具有低反射率。 交替层中的至少两个可以具有不超过最大面内折射率差的50％的平面外折射率。 聚合物层可以限定按顺序排列的光学重复单元，以具有特定的厚度分布，用于提供锐化的光谱转变。 回射层优选在所有入射平面上呈现后向反射，但是也可以在至少一个入射平面中进行回射，但不能在至少一个其它入射平面中。