Invention Grant
- Patent Title: Spectrally selective retroreflective system
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Application No.: US16462251Application Date: 2016-12-01
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Publication No.: US11640019B2Publication Date: 2023-05-02
- Inventor: John A. Wheatley , Gilles J. Benoit , Guanglei Du , Steven R. Anderson , Owen M. Anderson , David T. Yust , Rolf W. Biernath , Gary E. Gaides , Brian W. Lueck , Neeraj Sharma
- Applicant: 3M INNOVATIVE PROPERTIES COMPANY
- 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 Robert S. Moshrefzadeh
- International Application: PCT/US2016/064301 WO 20161201
- International Announcement: WO2018/097840 WO 20180531
- Main IPC: G02B5/124
- IPC: G02B5/124 ; G02B5/136 ; G02B5/12 ; G02B5/00 ; G02F1/1335

Abstract:
A retroreflective system is disclosed that includes a retroreflective sheet for retroreflecting light, and a light control film disposed on the retroreflective sheet. For a first wavelength, light incident on the light control film at each of a first and second angles of incidence is retroreflected. For a second wavelength, light incident on the light control film at the first, but not the second, angle of incidence is retroreflected.
Public/Granted literature
- US20190265395A1 SPECTRALLY SELECTIVE RETROREFLECTIVE SYSTEM Public/Granted day:2019-08-29
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