Invention Grant
US08879151B2 Internally patterned multilayer optical films using spatially selective birefringence reduction
有权
使用空间选择性双折射降低的内部图案化多层光学膜
- Patent Title: Internally patterned multilayer optical films using spatially selective birefringence reduction
- Patent Title (中): 使用空间选择性双折射降低的内部图案化多层光学膜
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Application No.: US13139826Application Date: 2009-12-22
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Publication No.: US08879151B2Publication Date: 2014-11-04
- Inventor: William Ward Merrill , Douglas S. Dunn , Travis L. Potts
- Applicant: William Ward Merrill , Douglas S. Dunn , Travis L. Potts
- Applicant Address: US MN St. Paul
- Assignee: 3M Innovative Properties Company
- Current Assignee: 3M Innovative Properties Company
- Current Assignee Address: US MN St. Paul
- Agent Yufeng Dong; Gregory D. Allen; Stephen C. Jensen
- International Application: PCT/US2009/069153 WO 20091222
- International Announcement: WO2010/075357 WO 20100701
- Main IPC: G02B5/30
- IPC: G02B5/30

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.
Public/Granted literature
- US20110255163A1 INTERNALLY PATTERNED MULTILAYER OPTICAL FILMS USING SPATIALLY SELECTIVE BIREFRINGENCE REDUCTION Public/Granted day:2011-10-20
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