Illumination unit and image projecting apparatus employing the same
    61.
    发明申请
    Illumination unit and image projecting apparatus employing the same 失效
    照明单元和使用该装置的图像投影装置

    公开(公告)号:US20060028816A1

    公开(公告)日:2006-02-09

    申请号:US11154671

    申请日:2005-06-17

    IPC分类号: F21V9/00

    摘要: An illumination unit includes a plurality of light source units to emit light beams having different wavelengths, and a synthesizing prism to synthesize the light beams emitted from the light source units to proceed on the same path. The synthesizing prism includes a first triangular prism having a first outer surface to transmit or reflect the light beams according to a direction in which the light beams are input, and first and second boundary surfaces, a second triangular prism having a second outer surface to transmit the light beams, a third boundary surface arranged to face the second boundary surface, and a fourth boundary surface, a third triangular prism having a third outer surface to transmit or reflect the light beams according to a direction in which the light beams are input, a fifth boundary surface arranged to face the fourth boundary surface, and a sixth boundary surface arranged to face the first boundary surface, and a color separation portion arranged at least one of positions between the second boundary surface and the third boundary surface, the fourth boundary surface and the fifth boundary surface, and the sixth boundary surface and the first boundary surface, to selectively transmit or reflect the light beams according to a wavelength of each light beam.

    摘要翻译: 照明单元包括发射具有不同波长的光束的多个光源单元和合成棱镜,用于合成从光源单元发射的光束在相同的路径上进行。 合成棱镜包括具有第一外表面的第一三角棱镜,用于根据输入光束的方向透射或反射光束;以及第一和第二边界面,具有第二外表面的第二三角棱镜,以传输 光束,与第二边界面相对配置的第三边界面和第四边界面,具有第三外表面的第三三棱镜,用于根据输入光束的方向透射或反射光束; 第五边界面,其布置成面向第四边界面;以及第六边界面,布置成面对第一边界面;以及颜色分离部,布置在第二边界面和第三边界面之间的至少一个位置,第四边界 表面和第五边界面以及第六边界面和第一边界面,以选择性地透射或反射 根据每个光束的波长来计算光束。