A polarisation separation element, a polarisation conversion system, an optical element, and a projection display system
    1.
    发明公开
    A polarisation separation element, a polarisation conversion system, an optical element, and a projection display system 审中-公开
    极化反应元素,极化反应系统,Optisches元素和Projektionsanzeigesystem

    公开(公告)号:EP1197766A3

    公开(公告)日:2004-02-25

    申请号:EP01308713.5

    申请日:2001-10-12

    IPC分类号: G02B5/04 G02B5/30 G02B27/28

    摘要: The present invention provides a polarisation separation element comprising a first array of prisms (20) having a wedge-shaped cross-section, and a second array of prisms (21) also having a wedge-shaped cross section. One of the prism arrays is an array of birefringent prisms. The present invention also provides a polarisation conversion system having a polarisation separation element (16) of the above type for directing light having a first polarisation in a first direction and for directing light having a second polarisation different from the first polarisation in a second direction different from the first direction; and one or more polarisation conversion elements (19a,19b) for converting light having the first and second polarisations to light having a substantially common output polarisation. The polarisation conversion system of the invention is suitable for use in a projection display system.

    摘要翻译: 本发明提供一种偏振分离元件,其包括具有楔形横截面的第一棱镜阵列(20)和还具有楔形横截面的棱镜(21)的第二阵列。 棱镜阵列之一是双折射棱镜阵列。 本发明还提供了一种偏振转换系统,其具有上述类型的偏振分离元件(16),用于引导具有第一方向的第一偏振的光和用于引导具有不同于第一偏振的第二偏振的光 与第一方向不同的第二方向; 以及用于将具有第一和第二极化的光转换为具有基本上共同的输出偏振的光的一个或多个偏振转换元件(19a,19b)。 本发明的偏振转换系统适用于投影显示系统。