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    HIGH TRANSMISSION FLUX LEVELING MULTILAYER OPTICAL FILM AND RELATED CONSTRUCTIONS
    1.
    发明申请
    HIGH TRANSMISSION FLUX LEVELING MULTILAYER OPTICAL FILM AND RELATED CONSTRUCTIONS 审中-公开
    高传输通量水平多层光学膜和相关构造

    公开(公告)号：US20110222263A1

    公开(公告)日：2011-09-15

    申请号：US13129468

    申请日：2009-11-17

    申请人： Michael F. Weber ,  Timothy J. Nevitt ,  Stephen A. Johnson ,  Yufeng Liu ,  David T. Yust

    发明人： Michael F. Weber ,  Timothy J. Nevitt ,  Stephen A. Johnson ,  Yufeng Liu ,  David T. Yust

    IPC分类号： F21V9/14 ,  G02B5/30

    CPC分类号： G02B5/305 ,  B32B3/08 ,  B32B7/02 ,  B32B27/08 ,  B32B27/302 ,  B32B27/32 ,  B32B2250/24 ,  B32B2307/412 ,  B32B2307/416 ,  B32B2307/418 ,  B32B2307/514 ,  B32B2307/518 ,  B32B2307/52 ,  B32B2307/5825 ,  B32B2307/584 ,  B32B2551/00 ,  G02F2001/133507

    摘要： A reflective film includes microlayers arranged into optical repeat units, each optical repeat unit including a negatively birefringent microlayer. The microlayers are tailored to provide the film with on-axis polarizing properties, such that normally incident light polarized along a block axis is substantially reflected and normally incident light polarized along a pass axis is substantially transmitted. On-axis transmission for the block axis may be 70%. The microlayers also provide the film with angularly dependent polarizing properties: p-polarized light incident in a block plane of incidence is substantially reflected at near-normal angles but substantially transmitted at an oblique angle. The film transmits unpolarized light incident in this plane more strongly at the oblique angle than at normal. The films can be used in direct-lit backlights, luminaires, and similar lighting systems for flux leveling to promote spatial brightness uniformity.

    摘要翻译： 反射膜包括布置成光学重复单元的微层，每个光学重复单元包括负双折射微层。 微层被定制以提供具有轴上偏振特性的膜，使得沿着块轴偏振的正常入射光被基本反射，并且通常沿着通过轴偏振的入射光基本上被透射。 块轴的轴向传动可能<20％，而传动轴的轴上传动可能> 70％。 微层还为膜提供具有角度依赖的偏振性质：入射在块平面中的p偏振光基本上在近似的角度反射，但基本上以倾斜角传播。 该膜以比正常情况下更倾斜地倾斜入射在该平面中的非偏振光。 这些胶片可用于直射式背光源，灯具和类似的照射系统，用于助焊剂流平，以促进空间亮度均匀性。

    Optical stack having birefringent layer of optically symmetrical crystallites
    2.
    发明授权
    Optical stack having birefringent layer of optically symmetrical crystallites 有权
    具有光学对称晶体的双折射层的光学堆叠

    公开(公告)号：US09069136B2

    公开(公告)日：2015-06-30

    申请号：US13638765

    申请日：2011-06-13

    申请人： Michael F. Weber ,  Yufeng Liu ,  Stephen A. Johnson ,  David T. Yust

    发明人： Michael F. Weber ,  Yufeng Liu ,  Stephen A. Johnson ,  David T. Yust

    IPC分类号： G02B5/30

    CPC分类号： G02B5/3083 ,  G02B5/305

    摘要： An optical stack (400) having a plurality of alternating polymeric layers (401, 402) is described. The alternating layers may be alternating birefringent (syndiotactic polystyrene, sPS) and isotropic (CoPENa) layers, or alternating positively and negatively birefringent layers. Birefringent layers are made using polymers which form optically symmetrical crystallites upon stretching of the polymer. The optical stack has a large refractive index difference in the x-direction (the stretching direction) and small refractive index differences in the y- and z-directions (the non-stretching directions). The optical stack can be made using standard film tentering methods and may be a multilayer reflective polarizer.

    摘要翻译： 描述了具有多个交替聚合层（401,402）的光学堆叠（400）。 交替层可以是交替的双折射（间同立构聚苯乙烯，sPS）和各向同性（CoPENa）层，或交替的正负双折射层。 使用在聚合物拉伸时形成光学对称微晶的聚合物制备双折射层。 光学叠层在x方向（拉伸方向）上的折射率差大，y方向和z方向（非拉伸方向）的折射率差小。 光学堆叠可以使用标准薄膜拉制方法制成，并且可以是多层反射偏振器。

    OPTICAL STACK HAVING BIREFRINGENT LAYER OF OPTICALLY SYMMETRICAL CRYSTALLITES
    3.
    发明申请
    OPTICAL STACK HAVING BIREFRINGENT LAYER OF OPTICALLY SYMMETRICAL CRYSTALLITES 有权
    具有光学对称晶体的双层光学堆叠

    公开(公告)号：US20130100530A1

    公开(公告)日：2013-04-25

    申请号：US13638765

    申请日：2011-06-13

    申请人： Michael F. Weber ,  Yufeng Liu ,  Stephen A. Johnson ,  David T. Yust

    发明人： Michael F. Weber ,  Yufeng Liu ,  Stephen A. Johnson ,  David T. Yust

    IPC分类号： G02B5/30

    CPC分类号： G02B5/3083 ,  G02B5/305

    摘要： An optical stack (400) having a plurality of alternating polymeric layers (401, 402) is described. The alternating layers may be alternating birefringent (syndiotactic polystyrene, sPS) and isotropic (CoPENa) layers, or alternating positively and negatively birefringent layers. Birefringent layers are made using polymers which form optically symmetrical crystallites upon stretching of the polymer. The optical stack has a large refractive index difference in the x-direction (the stretching direction) and small refractive index differences in the y- and z-directions (the non-stretching directions). The optical stack can be made using standard film tentering methods and may be a multilayer reflective polarizer.

    摘要翻译： 描述了具有多个交替聚合层（401,402）的光学堆叠（400）。 交替层可以是交替的双折射（间同立构聚苯乙烯，sPS）和各向同性（CoPENa）层，或交替的正负双折射层。 使用在聚合物拉伸时形成光学对称微晶的聚合物制备双折射层。 光学叠层在x方向（拉伸方向）上的折射率差大，y方向和z方向（非拉伸方向）的折射率差小。 光学堆叠可以使用标准薄膜拉制方法制成，并且可以是多层反射偏振器。

    POLARIZATION SENSITIVE FRONT PROJECTION SCREEN
    4.
    发明申请
    POLARIZATION SENSITIVE FRONT PROJECTION SCREEN 审中-公开
    极化敏感前投影屏幕

    公开(公告)号：US20120212812A1

    公开(公告)日：2012-08-23

    申请号：US13504339

    申请日：2010-11-10

    申请人： Michael F. Weber ,  Yufeng Liu ,  Timothy J. Nevitt

    发明人： Michael F. Weber ,  Yufeng Liu ,  Timothy J. Nevitt

    IPC分类号： G03B21/60

    CPC分类号： G03B21/604

    摘要： A projection system is disclosed, in which a screen may have improved rejection of ambient light by having a high reflectivity at low angles of incidence for a polarization parallel to that of the projector, a low reflectivity at high angles of incidence for a polarization parallel to that of the projector, and a low reflectivity at both low and high angles of incidence for a polarization perpendicular to that of the projector. In some embodiments, for p-polarized light polarized parallel to the projector, the power reflectivity is high at low angles of incidence and decreases to a low value at high angles of incidence. In some embodiments, for p-polarized light polarized perpendicular to the projector, the power reflectivity is low at low angles of incidence. In some embodiments, for s-polarized light polarized perpendicular to the projector, the power reflectivity remains low at all angles of incidence. In some embodiments, the screen includes a thin film structure that has alternating quarter-wave layers of isotropic and birefringent materials, which are refractive-index-matched for light polarized perpendicular to the projector, which form a high reflector at normal incidence for light polarized parallel to the projector, and which exhibit Brewster's angle effects for p-polarized light polarized parallel to the projector at high angles of incidence. The Brewster's angle effect may be reached by use of a light-scattering layer that increases the effective incident refractive index.

    摘要翻译： 公开了一种投影系统，其中屏幕可以通过在平行于投影仪的偏振的低入射角具有高反射率而具有改善的环境光的抑制，在与入射角平行的偏振的高入射角处的低反射率 投影仪的偏振角以及垂直于投影仪的偏振的低和高入射角的低反射率。 在一些实施例中，对于平行于投影仪偏振的p偏振光，在低入射角下的功率反射率高，并且在高入射角下降低到低值。 在一些实施例中，对于垂直于投影仪偏振的p偏振光，功率反射率在低入射角下较低。 在一些实施例中，对于垂直于投影仪偏振的s偏振光，功率反射率在所有入射角保持较低。 在一些实施例中，屏幕包括薄膜结构，其具有交替的各向同性和双折射材料的四分之一波长层，其对于垂直于投影仪偏振的光进行折射率匹配，其在垂直入射时形成用于光偏振的正反射器 平行于投影仪，并且以高入射角度平行于投影仪偏振的p偏振光表现出布鲁斯特的角度效应。 布鲁斯特的角度效应可以通过使用增加有效入射折射率的光散射层达到。

    Front projection screen with high contrast
    10.
    发明授权
    Front projection screen with high contrast 有权
    前置投影屏高对比度

    公开(公告)号：US08922888B2

    公开(公告)日：2014-12-30

    申请号：US13503883

    申请日：2010-11-19

    申请人： Yufeng Liu ,  David T. Yust

    发明人： Yufeng Liu ,  David T. Yust

    IPC分类号： G03B21/56

    CPC分类号： G03B21/56

    摘要： A light diffusing optical construction is disclosed. The optical construction includes a symmetric optical diffuser that scatters light in a first direction with a first viewing angle AH and in a second direction orthogonal to the first direction with a second viewing angle AV, where AV is substantially equal to AH. The symmetric optical diffuser includes an optically transparent first layer and a plurality of randomly arranged optically transparent beads partially embedded in the first layer leaving portions of the beads exposed. The optical construction also includes a specular reflector that reflects light that is not scattered by the symmetric optical diffuser. The specular reflector has a first average reflectance Ro in the visible at zero incident angle and a second average reflectance R60 in the visible at 60 degree incident angle. Ro/R60 is at least about 1.5. The optical construction also includes a light absorbing layer that absorbs light that is not reflected by the specular reflector.

    摘要翻译： 公开了一种光散射光学结构。 光学结构包括对称光学漫射器，其以第一视角AH在第一方向上散射光，并且在与第一方向正交的第二方向上具有第二视角AV，其中AV基本上等于AH。 对称光学漫射器包括光学透明的第一层和多个随机布置的光学透明珠，其部分地嵌入第一层中，留下珠的一部分露出。 光学结构还包括反射不被对称光漫射器散射的光的镜面反射器。 镜面反射体在零入射角可见中具有第一平均反射率Ro，在60度入射角处具有可见的第二平均反射率R60。 Ro / R60至少约为1.5。 光学结构还包括吸收未被镜面反射体反射的光的光吸收层。