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    • 7. 发明授权
    • Image projection apparatus
    • 图像投影仪
    • US07178921B2
    • 2007-02-20
    • US11233049
    • 2005-09-22
    • Kenji KonnoSoh OhzawaJun Ishihara
    • Kenji KonnoSoh OhzawaJun Ishihara
    • G03B21/28
    • G03B21/10G02B17/0663G03B21/005
    • An oblique projection optical system for leading rays of light from a display surface on which an image is displayed to a projection surface in such a way that the ray of light from the center of the display surface is obliquely incident on the projection surface in order to project a magnified image of the image displayed on the display surface onto the projection surface includes a plurality of reflecting surfaces having a power. At least two of the reflecting surfaces have a free-form curved surface, and, of all the reflecting surfaces, the one closest to the projection surface has a negative power and at least one of the other has a positive power. Alternatively, in a rear projection optical system having a projection optical system for projecting an image displayed on a panel display surface onto a screen surface, the projection optical system includes at least four curved-surface reflecting mirrors.
    • 一种倾斜投影光学系统,用于将来自显示图像的显示表面的光线引导到投影表面,使得来自显示表面的中心的光线倾斜地入射在投影表面上,以便 将显示在显示表面上的图像的放大图像投影到投影表面上,包括具有电力的多个反射表面。 至少两个反射表面具有自由曲面,并且在所有反射表面中,最靠近投影表面的一个反射表面具有负功率,而另一个反射表面中的至少一个具有正的功率。 或者,在具有用于将显示在面板显示面上的图像投影到屏幕表面上的投影光学系统的投影光学系统中,投影光学系统包括至少四个弯曲表面反射镜。