- 专利标题: INTERNALLY PATTERNED MULTILAYER OPTICAL FILMS USING SPATIALLY SELECTIVE BIREFRINGENCE REDUCTION
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申请号: EP09835743申请日: 2009-12-22
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公开(公告)号: EP2376956A4公开(公告)日: 2017-11-01
- 发明人: MERRILL WILLIAM WARD , DUNN DOUGLAS S , POTTS TRAVIS L
- 申请人: 3M INNOVATIVE PROPERTIES CO
- 专利权人: 3M INNOVATIVE PROPERTIES CO
- 当前专利权人: 3M INNOVATIVE PROPERTIES CO
- 优先权: US13973608 2008-12-22; US15799609 2009-03-06; US15800609 2009-03-06
- 主分类号: G02B5/30
- IPC分类号: G02B5/30 ; B42D25/23 ; B42D25/24 ; B42D25/391 ; G02B5/08 ; G02B5/28 ; G02F1/1335 ; G02F1/13363
摘要:
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.
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