Optical manifold
    3.
    发明申请
    Optical manifold 有权
    光学歧管

    公开(公告)号:US20090116215A1

    公开(公告)日:2009-05-07

    申请号:US11982480

    申请日:2007-11-02

    IPC分类号: F21K2/00

    摘要: Optical systems are described that have at least one source of a beam of blue light with divergence under 15°. A phosphor emits yellow light when excited by the blue light. A collimator is disposed with the phosphor and forms a yellow beam with divergence under 15°. A dichroic filter is positioned to transmit the beam of blue light to the phosphor and to reflect the beam of yellow light to an exit aperture. In different embodiments, the beams of blue and yellow light are incident upon said filter with central angles of 15°, 22°, and 45°. The filter may reflect all of one polarization and part of the other polarization, and a polarization rotating retroreflector may then be provided to return the unreflected light to the filter.

    摘要翻译: 描述的光学系统具有至少一个蓝光束的源,发散度在15°以下。 当由蓝光激发时,荧光体发射黄光。 准直仪与磷光体一起设置,并形成黄色光束,发散度在15°以下。 二向色滤光器被定位成将蓝光束传输到荧光体并将黄光束反射到出射孔。 在不同的实施例中,蓝色和黄色光束以15°,22°和45°的中心角度入射在所述过滤器上。 滤波器可以反射所有的一个偏振和另一个极化的一部分,然后可以提供偏振旋转后向反射器以将未反射的光返回到滤光器。