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    Lighting Devices With Patterned Printing of Diffractive Extraction Features
    12.
    发明申请
    Lighting Devices With Patterned Printing of Diffractive Extraction Features 有权
    具有图案印刷衍射提取特征的照明设备

    公开(公告)号：US20150003106A1

    公开(公告)日：2015-01-01

    申请号：US14486823

    申请日：2014-09-15

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： David S. Thompson ,  Zhaohui Yang ,  Matthew S. Stay ,  Vivian W. Jones

    IPC: F21V8/00

    CPC classification number: G02B6/0058 ,  G02B5/1819 ,  G02B6/0035 ,  G02B6/0036 ,  G02B6/0038 ,  G02B6/005 ,  G02B6/006

    Abstract: Extended area lighting devices include a light guide and diffractive surface features on a major surface of the light guide, at least some diffractive surface features adapted to couple guided-mode light out of the light guide. The diffractive features include first and second diffractive features disposed on respective first and second portions of the major surface. A patterned light transmissive layer, including a second light transmissive medium, optically contacts the second diffractive features but not the first diffractive features. A first light transmissive medium optically contacts the first but not the second diffractive features. The first and second portions may define indicia, and the first and second diffractive features provide low distortion for viewing objects through the light guide such that the indicia is not readily apparent to users when guided-mode light does not propagate within the light guide. Optical films having such diffractive features are also disclosed.

    Abstract translation: 扩展区域照明装置包括在导光体的主表面上的光导和衍射表面特征，至少一些衍射表面特征适于将导模光耦合到光导中。 衍射特征包括设置在主表面的相应第一和第二部分上的第一和第二衍射特征。 包括第二透光介质的图案化透光层光学地接触第二衍射特征而不是第一衍射特征。 第一透光介质光学地接触第一但不是第二衍射特征。 第一和第二部分可以限定标记，并且第一和第二衍射特征提供用于通过导光体观察物体的低失真，使得当导光模式光不在光导内传播时，标记对于用户来说不容易明显。 还公开了具有这种衍射特征的光学膜。

    Optical layer and optical system
    14.
    发明授权
    Optical layer and optical system 有权

    公开(公告)号：US12222599B2

    公开(公告)日：2025-02-11

    申请号：US17776941

    申请日：2020-12-01

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Zhaohui Yang ,  Przemyslaw P. Markowicz ,  Mark A. Roehrig ,  Tri D. Pham ,  Serena L. Schleusner ,  David A. Rosen ,  Yang Liu

    IPC: G02F1/1335 ,  G02B3/00

    Abstract: An optical system includes a lens layer including a plurality of microlenses arranged along orthogonal first and second directions, and at least one optically opaque mask layer spaced apart from the lens layer and defining a plurality of through openings therein arranged along the first and second directions. There is a one-to-one correspondence between the microlenses and the openings, such that for each microlens, the microlens and corresponding openings are substantially centered on a straight line making a same oblique angle with the lens layer. An optical layer can include the lens layer and the optically opaque mask layer embedded in the optical layer.

    OPTICAL FILMS WITH INFRARED FILTERS
    19.
    发明申请
    OPTICAL FILMS WITH INFRARED FILTERS 有权

    公开(公告)号：US20230081992A1

    公开(公告)日：2023-03-16

    申请号：US17893380

    申请日：2022-08-23

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Zhaohui Yang ,  Raghunath Padiyath ,  John A. Wheatley ,  Ryan T. Fabick ,  Bryan V. Hunt

    IPC: G02B5/20 ,  G01S17/04 ,  G06V40/13

    Abstract: An optical film includes a plurality of first layers disposed on a plurality of second layers. For each angle of incidence in an incident angle range of 0-50 degrees, an optical transmittance of each of the optical film and the plurality of second layers versus wavelength includes a band edge disposed in a transition wavelength range separating a visible wavelength range where the optical film and the plurality of second layers have respective average optical transmittances Tv and Tv2 from an infrared wavelength range where the optical film and the plurality of second layers have respective average optical transmittances Ti and Ti2. Each of Tv and Tv2 is greater than about 30%. An average value of Tv2 is greater than an average value of Tv by at least 5%. An average value of Ti is less than an average value of Ti2 by at least 20%.

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