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    Optical film and optical stack
    41.
    发明授权
    Optical film and optical stack 有权

    公开(公告)号：US12271015B2

    公开(公告)日：2025-04-08

    申请号：US17605395

    申请日：2020-05-20

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Adam D. Haag ,  Yi-Chen Chen ,  Tze Yuan Wang ,  Hiroki Matsuda ,  Michelle L. Toy ,  Ryan J. Eismin ,  John F. VanDerlofske, III ,  David J. McDaniel ,  Matthew B. Johnson

    IPC: G02B5/30

    Abstract: An optical film includes a plurality of alternating first and second polymeric layers, such that the first polymeric layers have a smaller average in-plane index of refraction than the second polymeric layers and the first polymeric layers have a glass transition temperature of at least 107 deg. C. The optical film may be a reflective polarizer. An optical stack includes a linear absorbing polarizer and the reflective polarizer disposed on, and bonded to, the absorbing polarizer. The reflective polarizer has an optical reflectance of at least 60% for a first polarization state and an optical transmittance of at least 60% for an orthogonal second polarization state. When heated at 105 deg. C. for 15 minutes, a difference in shrinkage of the reflective polarizer and the absorbing polarizer along the first and second polarization states is greater than about zero and 0.2%, respectively.

    OPTICAL SYSTEM AND OPTICAL FILM
    44.
    发明公开
    OPTICAL SYSTEM AND OPTICAL FILM 审中-公开

    公开(公告)号：US20240201428A1

    公开(公告)日：2024-06-20

    申请号：US18431242

    申请日：2024-02-02

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： John D. Le ,  Zhisheng Yun ,  Timothy L. Wong ,  Timothy J. Nevitt ,  Adam D. Haag ,  Arthur L. Kotz

    IPC: G02B5/30

    CPC classification number: G02B5/305

    Abstract: Optical films, such as reflective polarizer films, and optical systems including the optical films are described. An optical system includes one or more optical lenses having at least one curved major surface, a partial reflector, and a reflective polarizer. For a substantially normally incident light in a predetermined wavelength range extending at least from about 450 nm to about 600 nm: the partial reflector has an average optical reflectance of at least 30%, and the reflective polarizer has an average optical reflectance Rs for a first polarization state, an average optical transmittance Tp for an orthogonal second polarization state, and an average optical reflectance Rp for the second polarization state, where Tp≥80%, Rp≤1%, and 50%≤Rs≤95%.

    POLARIZATION BEAM SPLITTER AND HOT MIRROR FOR HEADS UP DISPLAY
    49.
    发明公开
    POLARIZATION BEAM SPLITTER AND HOT MIRROR FOR HEADS UP DISPLAY 审中-公开

    公开(公告)号：US20230350217A1

    公开(公告)日：2023-11-02

    申请号：US18220934

    申请日：2023-07-12

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Craig R. Schardt ,  Adam D. Haag ,  Stephen J. Willet

    IPC: G02B27/10 ,  G02B5/28 ,  G02B27/01

    CPC classification number: G02B27/1013 ,  G02B5/282 ,  G02B27/0101 ,  G02B2027/0145

    Abstract: An optical system for displaying a virtual image to a viewer includes stacked integral first reflective polarizer and integral second reflective polarizer, a display, and a mirror. For substantially normally incident light: for at least one visible wavelength in a first wavelength range, the first reflective polarizer reflects at least 60% of the incident light having a first polarization state and transmits at least 60% of the incident light having an orthogonal second polarization state, and the second reflective polarizer transmits at least 60% of the incident light for each of the first and second polarization states; and for at least one infrared wavelength in a second wavelength range, the first reflective polarizer reflects at least 60% of the incident light having the first polarization state and transmits at least 60% of the incident light having the second polarization state, and the second reflective polarizer reflects at least 60% of the incident light having the second polarization state and transmits at least 20% of the light having the first polarization state.

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