公开(公告)号：US20240151889A1

公开(公告)日：2024-05-09

申请号：US18548438

申请日：2022-02-17

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Kevin T. Huseby ,  Stephen A. Johnson ,  Samuel A. Minno ,  Lin Zhao ,  William T. Fay ,  Robert L. Brott ,  Gilles J-B Benoit

IPC: G02B5/30 ,  G02B5/08

CPC classification number: G02B5/305 ,  G02B5/0841

Abstract: A multilayer optical film includes a plurality of optical repeat units. Each of the optical repeat units includes at least four sequentially arranged first through fourth layers including first and third layers having respective f-ratios f1 and f3. The optical film has a first order reflection band having a reflection peak height Rp1 and any second order reflection band has a reflection peak height Rp2, where Rp1/Rp2≥5. Rp1/Rp2 may remain at least 5 when changing at least one of the f-ratios f1 and f3 continuously by 0.2. A thickness of each of the second and fourth layers can be less than a thickness of each of the first and third layers by at least a factor of 2, or a thickness of a same one of the first and third layers can differ from a thickness of each other layer by at least a factor of 2.5.