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    Thin hollow backlights with beneficial design characteristics
    21.
    发明授权
    Thin hollow backlights with beneficial design characteristics 有权
    薄空心背光灯具有有益的设计特点

    公开(公告)号：US08926159B2

    公开(公告)日：2015-01-06

    申请号：US13938016

    申请日：2013-07-09

    Applicant: 3M Innovative Properties Company

    Inventor： Timothy J. Nevitt ,  Timothy J. Hebrink ,  Michael F. Weber ,  Rolf W. Biernath ,  David G. Freier ,  John A. Wheatley ,  Andrew J. Ouderkirk ,  Charles D. Hoyle ,  Kristopher J. Derks

    IPC: F21V7/04 ,  F21V8/00 ,  G02F1/1335

    CPC classification number: F21V7/04 ,  G02B6/0055 ,  G02B6/0056 ,  G02B6/0068 ,  G02B6/0096 ,  G02F1/133603 ,  G02F1/133605 ,  G02F1/13362

    Abstract: A front and back reflector are arranged to form a hollow light recycling cavity having an output region, and one or more light sources (e.g. LEDs) are disposed to emit light into the cavity. In one aspect, the back reflector has a design characterized by a first and second parameter. The first design parameter is a ratio of the collective emitting area of the light sources Aemit to the area of the output region Aout, and Aemit/Aout is preferably from 0.0001 to 0.1. The second design parameter is SEP/H, where H is the depth of the recycling cavity, and SEP is an average plan view source separation associated with the light sources. Other aspects of the disclosed extended area light sources are also described.

    Abstract translation: 前后反射器被布置成形成具有输出区域的中空光循环腔，并且设置一个或多个光源（例如LED）以将光发射到空腔中。 在一个方面，后反射器具有以第一和第二参数为特征的设计。 第一设计参数是光源Aemit的总发光面积与输出区域Aout的面积的比，Aemit / Aout优选为0.0001〜0.1。 第二个设计参数是SEP / H，其中H是回收腔的深度，SEP是与光源相关的平均平面视图源分离。 还描述了所公开的扩展区域光源的其他方面。

    OPTICALLY ACTIVE MATERIALS AND ARTICLES AND SYSTEMS IN WHICH THEY MAY BE USED
    22.
    发明申请
    OPTICALLY ACTIVE MATERIALS AND ARTICLES AND SYSTEMS IN WHICH THEY MAY BE USED 审中-公开
    可以使用的光学活性材料及其制品和系统

    公开(公告)号：US20140285889A1

    公开(公告)日：2014-09-25

    申请号：US14268469

    申请日：2014-05-02

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Robert L.W. Smithson ,  Rolf W. Biernath

    IPC: G02B5/124

    CPC classification number: G06K9/78 ,  B60R13/10 ,  G02B5/0816 ,  G02B5/124 ,  G02B5/128 ,  G02B5/136 ,  G02B5/208 ,  G02B5/26 ,  G06K9/2018 ,  G06K9/209 ,  G06K9/62 ,  G06K2209/15 ,  G09F13/16 ,  Y10T156/10 ,  Y10T428/24802

    Abstract: The inventors of the present application developed novel optically active materials, methods, and articles. One embodiment of the present application is an optically active article, comprising: an infrared-reflecting material positioned adjacent to an optically active substrate such that the infrared-reflecting material forms a pattern that can be read by an infrared sensor when the optically active substrate is illuminated by an infrared light source. Another embodiment of the present application relates to a method of manufacturing an optically active article, comprising: obtaining an optically active sheeting; and positioning an infrared-reflecting material on the optically active sheeting to form a pattern. The optically active article may be, for example, a license plate.

    Abstract translation: 本申请的发明人开发了新型光学活性材料，方法和制品。 本申请的一个实施方案是光学活性制品，其包括：邻近光学活性基底定位的红外反射材料，使得当光学活性基底为光学活性基底时红外线反射材料形成可由红外线传感器读取的图案 由红外光源照亮。 本申请的另一个实施方案涉及一种制造光学活性物品的方法，包括：获得光学活性片材; 并将红外线反射材料定位在光学活性片材上以形成图案。 光学活性物品可以是例如车牌。

    Optical filters complementary angular blocking regions
    24.
    发明授权
    Optical filters complementary angular blocking regions 有权

    公开(公告)号：US11899230B2

    公开(公告)日：2024-02-13

    申请号：US17746170

    申请日：2022-05-17

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： John A. Wheatley ,  Guanglei Du ,  Gilles J. Benoit ,  Rolf W. Biernath

    IPC: G02B5/28 ,  G02B5/00 ,  G02B5/04 ,  G02B5/20

    CPC classification number: G02B5/28 ,  G02B5/003 ,  G02B5/045 ,  G02B5/208 ,  G02B2207/123

    Abstract: An example optical filter may include an angle blocking layer having a first angular light blocking range θAL relative to a normal axis, and an interference filter adjacent the angle blocking layer having a second angular light blocking range θIF relative to the normal axis. θIF and θAL at least partially overlap. The example optical filter has a predetermined light transmission zone comprising angles from 0° to a maximum light transmission angle θTmax relative to a normal axis of the major surface. The example optical filter has a predetermined angular light blocking zone θB, a union of θIF and θAL. An example optical filter may include an interference filter having an incidence angle-dependent reflection band and an absorbing layer having an absorption band. The incidence angle-dependent reflection band and the absorption band may overlap at at least one wavelength at at least one angle of incidence.

    OPTICAL SYSTEM
    27.
    发明申请
    OPTICAL SYSTEM 有权

    公开(公告)号：US20210231851A1

    公开(公告)日：2021-07-29

    申请号：US17226265

    申请日：2021-04-09

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： John A. Wheatley ,  Guanglei Du ,  Gilles J. Benoit ,  Rolf W. Biernath ,  Christopher A. McLaughlin ,  Sherie A. Kristie

    IPC: G02B5/28 ,  G02B5/08 ,  G02B5/22 ,  G02B5/26 ,  G02B5/30

    Abstract: An optical system includes an oriented polymeric multilayer optical film having a first reflection band, and a light source configured to produce light in an output band and/or a sensor configured to receive light in an input band. The light source and/or sensor is in optical communication with the oriented polymeric multilayer optical film. In some cases, the first reflection band overlaps the input and/or output band at normal incidence, but not at an oblique incidence angle. In some cases, the first reflection band overlaps the input and/or output band at an oblique incidence angle, but not at normal incidence. The optical system can further include a non-birefringent optical filter having a first blocking band where the first blocking band overlaps the first reflection band for at least one of normal incidence or an oblique incidence angle.

    Optical filter
    28.
    发明授权
    Optical filter 有权

    公开(公告)号：US11016229B2

    公开(公告)日：2021-05-25

    申请号：US16095406

    申请日：2017-05-30

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： John A. Wheatley ,  Gilles J. Benoit ,  Todd A. Ballen ,  Kenneth L. Smith ,  Guanglei Du ,  Edward J. Kivel ,  Rolf W. Biernath ,  Jordan D. Whitney ,  Daniel J. Schmidt

    IPC: G02B5/20 ,  G02B27/28 ,  G02B5/26 ,  G02B5/30

    Abstract: An optical filter including a polarizer and a visible light blocking filter is described. The polarizer is configured to transmit at least 60 percent of light in a first infrared wavelength range that is incident on the polarizer at normal incidence in a first polarization state, to transmit less than 30 percent of light in a second infrared wavelength that is incident on the polarizer at normal incidence in a second polarization state orthogonal to the first polarization state, and to transmit less than 30 percent of light in a third infrared wavelength range that is incident on the polarizer with a 50 degree angle of incidence in the second polarization state. The visible light blocking filter configured to transmit at least 60 percent of light in the first infrared wavelength range at normal incidence in the first polarization state.

    PATTERNED MARKING OF MULTILAYER OPTICAL FILM BY THERMAL CONDUCTION
    30.
    发明申请
    PATTERNED MARKING OF MULTILAYER OPTICAL FILM BY THERMAL CONDUCTION 审中-公开

    公开(公告)号：US20180313992A1

    公开(公告)日：2018-11-01

    申请号：US16030109

    申请日：2018-07-09

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Michael Benton Free ,  Martin B. Wolk ,  Rolf W. Biernath ,  Stephen A. Johnson ,  William W. Merrill ,  William F. Edmonds ,  Claire A. Jalbert

    IPC: G02B5/30 ,  G02B5/28 ,  G02B5/08

    CPC classification number: G02B5/3083 ,  G02B5/0841 ,  G02B5/285 ,  G02B5/305

    Abstract: A multilayer optical film has a packet of microlayers that selectively reflect light by constructive or destructive interference to provide a first reflective characteristic. At least some of the microlayers are birefringent. A stabilizing layer attaches to and covers the microlayer packet proximate an outer exposed surface of the film. Heating element(s) can physically contact the film to deliver heat to the packet through the stabilizing layer by thermal conduction, at altered region(s) of the film, such that the first reflective characteristic changes to an altered reflective characteristic in the altered region(s) to pattern the film. The stabilizing layer provides sufficient heat conduction to allow heat from the heating elements to change (e.g. reduce) the birefringence of the birefringent microlayers disposed near the outer exposed surface in the altered region(s), while providing sufficient mechanical support to avoid substantial layer distortion of the microlayers near the outer exposed surface in the altered region(s).

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