Polarizing beam splitter
    1.
    发明授权
    Polarizing beam splitter 有权
    极化分束器

    公开(公告)号:US06609795B2

    公开(公告)日:2003-08-26

    申请号:US09878575

    申请日:2001-06-11

    IPC分类号: G03B2100

    CPC分类号: G02B27/283 Y10T428/24942

    摘要: The present invention provides a unique polarizing beam splitter (PBS) that is suitable for use in projection systems and displays. The PBS contains at least one prism having at least one major surface and having a refractive index of at least about 1.6 and a birefringent film disposed on the major surface of the prism. The birefringent film is a multi-layer film having layers of at least a first material and a second material. After uniaxial stretching, the film exhibits a refractive index difference of less than about 0.15 units in the stretched direction.

    摘要翻译: 本发明提供了适用于投影系统和显示器的独特的偏振分束器(PBS)。 PBS包含至少一个具有至少一个主表面并具有至少约1.6的折射率的棱镜和设置在棱镜的主表面上的双折射膜。 双折射膜是具有至少第一材料和第二材料层的多层膜。 在单轴拉伸之后,膜在拉伸方向上的折射率差小于约0.15单位。

    Projection apparatus
    3.
    发明授权
    Projection apparatus 失效
    投影仪

    公开(公告)号:US07261418B2

    公开(公告)日:2007-08-28

    申请号:US10987528

    申请日:2004-11-12

    IPC分类号: G03B21/14

    摘要: A projection engine uses a first polarizing beam splitter (PBS) that substantially reflects light incident along a first input direction in a first polarization state and substantially transmits light incident in the first input direction in a second polarization state orthogonal to the first polarization state. The first PBS demonstrates an angularly dependent reflectivity for light in the second polarization state that is asymmetric about the first input direction. At least two imager devices are positioned to receive light reflected and transmitted by the first PBS respectively. The imager devices modulate the incident light with an image. The image light from the imagers is combined and projected.

    摘要翻译: 投影引擎使用第一偏振分束器(PBS),该第一偏振分束器(PBS)基本上反射沿第一输入方向入射的光以第一偏振状态,并以与第一偏振状态正交的第二偏振状态基本上透射沿第一输入方向入射的光。 第一PBS显示出在第二极化状态下对于第一输入方向不对称的光的角度依赖的反射率。 定位至少两个成像器件以接收由第一PBS反射和透射的光。 成像仪设备用图像调制入射光。 来自成像器的图像光被组合和投影。

    Polarization converting color combiner
    6.
    发明授权
    Polarization converting color combiner 有权
    极化转换颜色组合器

    公开(公告)号:US08654444B2

    公开(公告)日:2014-02-18

    申请号:US13129884

    申请日:2009-11-02

    IPC分类号: G02B5/30

    CPC分类号: G02B27/102 G02B27/286

    摘要: Optical elements, color combiners using the optical elements, and image projectors using the color combiners are described. The optical elements can be configured as color combiners that receive different wavelength spectrums of light and produce a combined light output that includes the different wavelength spectrums of light. In one aspect, the received light inputs are unpolarized, and the combined light output is polarized in a desired state. The optical elements are configured to minimize the passage of light which may be damaging to wavelength-sensitive components in the light combiner. Image projectors using the color combiners can include imaging modules that operate by reflecting or transmitting polarized light.

    摘要翻译: 描述使用光学元件的光学元件,组合器以及使用该颜色组合器的图像投影仪。 光学元件可以被配置为接收不同波长光谱的颜色组合器,并产生包括不同波长光谱的组合光输出。 在一个方面,所接收的光输入是非偏振的,并且组合的光输出在期望的状态下极化。 光学元件被配置为使可能损害光组合器中的波长敏感部件的光的通过最小化。 使用颜色组合器的图像投影仪可以包括通过反射或透射偏振光来操作的成像模块。

    LIGHT COMBINER
    7.
    发明申请
    LIGHT COMBINER 审中-公开
    灯组合

    公开(公告)号:US20110007392A1

    公开(公告)日:2011-01-13

    申请号:US12810373

    申请日:2008-12-17

    IPC分类号: G02B27/28

    CPC分类号: G02B27/283 G02B27/145

    摘要: Light combiners and light splitters, and methods of using light combiners and light splitters are described. In particular, the description relates to light combiners and splitters that combine and split, respectively, light of different wavelength spectrums using polarizing beam splitters. The polarizing beam splitters include a reflective polarizer to efficiently split incident light into transmitted and reflected beams having different polarization directions. Reflectors and quarter-wave retarders are positioned facing selected prism faces of the polarizing beam splitters, to affect the polarization state of light passing through the prism faces. The reflectors can be dichroic filters adapted to reflect light that is outside a selected wavelength range, so that light of different wavelength spectrums can be affected at different prism faces. The surfaces of each polarizing beam splitter can be polished so that the light utilization efficiency is increased due to total internal reflection within the polarizing beam splitter. The light combiners can combine up to five unpolarized different color lights to produce an unpolarized polychromatic light output, which may be white light useful for a projection display. The light splitters can split unpolarized polychromatic light to produce up to five unpolarized different color light outputs.

    摘要翻译: 光组合器和光分离器以及使用光组合器和分光器的方法被描述。 特别地,该描述涉及使用偏振分束器分别组合和分离不同波长光谱的光的光组合器和分束器。 偏振分束器包括有效地将入射光分离成具有不同偏振方向的透射和反射光束的反射偏振器。 反射器和四分之一波长延迟器被定位在偏振分束器的选定的棱镜面上,以影响穿过棱镜面的光的偏振状态。 反射器可以是适于反射在选定波长范围外的光的二向色滤光片,使得不同波长光谱的光可以在不同的棱镜面受到影响。 每个偏振分束器的表面可以被抛光,使得由于偏振分束器内的全内反射而增加光的利用效率。 光组合器可以组合多达五个非偏振的不同颜色的光以产生非偏振多色光输出,其可以是用于投影显示的白光。 分光器可以分离非偏振多色光,产生多达五个非偏振的不同颜色的光输出。

    Stress birefringence compensation in polarizing beamsplitters and systems using same
    8.
    发明授权
    Stress birefringence compensation in polarizing beamsplitters and systems using same 有权
    偏振分束器和使用它的系统中的应力双折射补偿

    公开(公告)号:US07731366B2

    公开(公告)日:2010-06-08

    申请号:US12037334

    申请日:2008-02-26

    摘要: An optical system is provided. The optical system comprises a first polarizing beamsplitter (PBS), a first reflecting image-forming device, and a first quarter-wave retarding element. An optical system is also provided that comprises an image-forming device, a reflective polarizing layer, at least a first birefringent element disposed on an optical path between the image-forming device and the polarizing layer, and a quarter-wave retarding element. Further provided is an optical system comprising a color combiner unit, at least two polarizing beamsplitters (PBSs), and a first quarter-wave retarding element. The present application also provides methods of compensating for birefringence in an image projection system.

    摘要翻译: 提供光学系统。 光学系统包括第一偏振分束器(PBS),第一反射成像装置和第一四分之一波长延迟元件。 还提供一种光学系统,其包括图像形成装置,反射偏振层,设置在图像形成装置和偏振层之间的光路上的至少第一双折射元件和四分之一波长延迟元件。 还提供了一种光学系统,其包括颜色组合器单元,至少两个偏振分束器(PBS)和第一四分之一波长延迟元件。 本申请还提供了补偿图像投影系统中双折射的方法。

    High contrast liquid crystal display and projection system using same
    9.
    发明授权
    High contrast liquid crystal display and projection system using same 有权
    高对比度液晶显示和投影系统使用相同

    公开(公告)号:US07686453B2

    公开(公告)日:2010-03-30

    申请号:US11311873

    申请日:2005-12-19

    IPC分类号: G03B21/14 G03B21/00

    摘要: A projection system includes a projection lens unit, a color combiner, and at least a first and a second image-forming devices for generating single color images. The single color images are combined in the color combiner to produce a colored image light beam. The colored image light beam passes from the color combiner to the projection lens system. A polarization control element is disposed between the color combiner and the first image-forming device. The polarization control element alters the polarization of light at either one of the first and second color, while not altering the polarization of light of the other of the first and second color. In some embodiments, the polarization control element is oriented to substantially prevent light at the second color from passing from the color combiner to the first image-forming device via a polarizing beamsplitter.

    摘要翻译: 投影系统包括投影透镜单元,颜色组合器以及用于产生单色图像的至少第一和第二图像形成装置。 单色图像在组合器中组合以产生彩色图像光束。 彩色图像光束从组合器​​到投影透镜系统。 偏光控制元件设置在彩色组合器和第一图像形成装置之间。 偏振控制元件改变第一和第二颜色中的任何一个处的光的偏振,同时不改变第一和第二颜色中的另一个的光的偏振。 在一些实施例中,偏振控制元件取向为基本上防止第二种颜色的光通过偏振分束器从分色器通过第一成像装置。