| 摘要 |
<p>Provided is a projecting video display device that has reduced light loss while maintaining the effect of suppressing color mixing. The projecting video display device is provided with a light source (1), an illumination optical system, a video display element (10), and a projecting optical system (11). The illumination optical system is provided with: a multiple reflection element (3) that causes the distribution of light from the light source to be uniform; a color wheel (4) that separates the colors of the light from the multiple reflection element (3); and lenses (6, 7) that magnify the light from the color wheel (4). When two axes that are perpendicular in a vertical plane along the direction of progression of light are respectively defined as the X-axis and the Y-axis, the radius of curvature in the X-axis direction and the radius of curvature in the Y-axis direction of the lenses (6, 7) differ. The aspect ratio of the exit surface of the multiple reflection element (3) is greater than the aspect ratio of the video display element (10). The lenses (6, 7) may be cylindrical lenses or toroidal lenses.</p> |
