公开(公告)号：US06174060B1

公开(公告)日：2001-01-16

申请号：US09139622

申请日：1998-08-25

申请人： Hirofumi Imaoka ,  Satoru Moriya ,  Tetsuji Suzuki ,  Fujiko Koyama ,  Ryusaku Takahashi ,  Yasuo Ishizaka ,  Motomu Takada

发明人： Hirofumi Imaoka ,  Satoru Moriya ,  Tetsuji Suzuki ,  Fujiko Koyama ,  Ryusaku Takahashi ,  Yasuo Ishizaka ,  Motomu Takada

IPC分类号： G03B2114

CPC分类号： G02B27/283 ,  H04N9/3105

摘要： A color separating/light guiding optics comprises two independent dichroic mirrors, reflection mirrors and correcting lenses. A horizontal plane region occupied by these optical components is entirely involved in a horizontal plane region occupied by a light modulating/color compositing/image projecting optics. A red beam is guided along a detoured optical path extending across a dead space below a projection lens. Although the optical path length of the red beam becomes longer than those of the blue beam and the green beam, the detoured optical path provides a sufficient space for installing the correcting lenses. The substantial optical path lengths of three primary color beams can be equalized with each other by the provision of these correcting lenses.

摘要翻译： 颜色分离/光导光学器件包括两个独立的分色镜，反射镜和校正透镜。 由这些光学部件占据的水平面区域完全参与由光调制/颜色合成/图像投影光学器件占据的水平面区域。 红色光束沿着延伸穿过投影透镜下方的死空间的弯曲光路被引导。 虽然红色光束的光程长度比蓝色光束和绿色光束的光路长度长，但是绕线光路提供了用于安装校正透镜的足够的空间。 通过提供这些校正透镜可以使三个原色光束的实质光路长度彼此相等。