Invention Grant
- Patent Title: Multilayer optical films having side-by-side polarizer/polarizer zones
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Application No.: US15042425Application Date: 2016-02-12
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Publication No.: US09651726B2Publication Date: 2017-05-16
- Inventor: William Ward Merrill , Douglas S. Dunn
- Applicant: 3M INNOVATIVE PROPERTIES COMPANY
- Applicant Address: US MN Saint Paul
- Assignee: 3M INNOVATIVE PROPERTIES COMPANY
- Current Assignee: 3M INNOVATIVE PROPERTIES COMPANY
- Current Assignee Address: US MN Saint Paul
- Agent Gregory D. Allen
- Main IPC: G02B5/30
- IPC: G02B5/30 ; G02B5/08 ; G02B27/28 ; G02B5/28 ; B42D25/23 ; B42D25/24 ; B42D25/391 ; G02F1/1335 ; G02F1/13363

Abstract:
A reflective film includes interior layers that selectively reflect light by constructive or destructive interference, the layers extending from a first to a second zone of the film. In the first zone the layers provide a first reflective polarizer characteristic, and in a second zone the layers provide a substantially different reflective polarizer characteristic. The second zone is characterized by at least some of the layers having a reduced birefringence relative to their birefringence in the first zone. In some cases the first reflective polarizer characteristic may have a pass axis that is substantially orthogonal to that of the second reflective polarizer characteristic. The film may have substantially the same thickness in the first and second zones, or a substantially reduced thickness in the second zone relative to the first zone.
Public/Granted literature
- US20160170113A1 MULTILAYER OPTICAL FILMS HAVING SIDE-BY-SIDE POLARIZER/POLARIZER ZONES Public/Granted day:2016-06-16
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