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    INTERNALLY PATTERNED MULTILAYER OPTICAL FILMS USING SPATIALLY SELECTIVE BIREFRINGENCE REDUCTION
    4.
    发明申请
    INTERNALLY PATTERNED MULTILAYER OPTICAL FILMS USING SPATIALLY SELECTIVE BIREFRINGENCE REDUCTION 审中-公开
    使用空间选择性减少的内部图案多层光学膜

    公开(公告)号：US20140308491A1

    公开(公告)日：2014-10-16

    申请号：US14315778

    申请日：2014-06-26

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： William W. Merrill ,  Douglas S. Dunn ,  Travis L. Potts

    IPC: G02B5/30

    CPC classification number: G02B5/3041 ,  B42D25/23 ,  B42D25/24 ,  B42D25/391 ,  G02B5/0816 ,  G02B5/0841 ,  G02B5/285 ,  G02B5/287 ,  G02B5/30 ,  G02B5/305 ,  G02B5/3083 ,  G02B27/28 ,  G02F1/133536 ,  G02F1/13363 ,  G02F2001/133521 ,  Y10T428/24942

    Abstract: A reflective film includes interior layers arranged to selectively reflect light by constructive or destructive interference, the layers extending from a first zone to a second zone of the film. The film has a first thickness and the interior layers provide a first reflective characteristic in the first zone; the film has a second thickness and the interior layers provide a second reflective characteristic in the second zone. The difference between the first and second reflective characteristics is not substantially attributable to any difference between the first and second thicknesses, which difference may be zero. Rather, the difference in the reflective characteristics is substantially attributable to reduced birefringence of at least some of the interior layers in one zone relative to the other zone. The film may also incorporate absorbing agents to assist in the manufacture or processing of the film. Related methods and articles are also disclosed.

    Abstract translation: 反射膜包括布置成通过结构性或相消干涉选择性地反射光的内层，所述层从膜的第一区延伸到第二区。 该膜具有第一厚度，并且内部层在第一区域中提供第一反射特性; 该膜具有第二厚度，并且内部层在第二区域中提供第二反射特性。 第一和第二反射特性之间的差异基本上不能归因于第一和第二厚度之间的任何差异，该差值可以为零。 相反，反射特性的差异基本上归因于在一个区域中的至少一些内层相对于另一区域的双折射率的降低。 该薄膜还可以包含吸收剂以协助制造或加工薄膜。 还公开了相关的方法和文章。

    Patterned marking of multilayer optical film by thermal conduction
    9.
    发明授权
    Patterned marking of multilayer optical film by thermal conduction 有权

    公开(公告)号：US09864120B2

    公开(公告)日：2018-01-09

    申请号：US14916819

    申请日：2014-09-03

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Michael Benton Free ,  Martin B. Wolk ,  Rolf W. Biernath ,  Stephen A. Johnson ,  William W. Merrill ,  William F. Edmonds ,  Claire A. Jalbert

    IPC: G02B5/30 ,  G02B5/08 ,  G02B5/28

    CPC classification number: G02B5/3083 ,  G02B5/0841 ,  G02B5/285 ,  G02B5/305

    Abstract: A multilayer optical film (130) has a packet of microlayers that selectively reflect light by constructive or destructive interference to provide a first reflective characteristic. At least some of the microlayers are birefringent. A stabilizing layer attaches to and covers the microlayer packet proximate an outer exposed surface of the film Heating elements (122) can physically contact the film to deliver heat to the packet through the stabilizing layer by thermal conduction, at altered regions of the film, such that the first reflective characteristic changes to an altered reflective characteristic in the altered regions to pattern the film The stabilizing layer provides sufficient heat conduction to allow heat from the heating elements to change (e.g. reduce) the birefringence of the birefringent microlayers disposed near the outer exposed surface in the altered regions, while providing sufficient mechanical support to avoid substantial layer distortion of the microlayers near the outer exposed surface in the altered regions.

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