| 摘要 |
A screen is arranged substantially in parallel with a yz-plane. A first mirror is placed with its reflection plane substantially perpendicular to the yz-plane and also inclined approximately 45 DEG to an xy-plane. At least an electro-optical device, color combining means, and projection lens are arranged along the xy-plane so that an image-light ray emitted from a color-combining optical system enters the first mirror with its optical-axis parallel to the xy plane and inclined alpha DEG with respect to a y-axis. A second mirror is placed substantially perpendicularly to an XZ-plane and also with an inclination of smaller by alpha /2 DEG than 45 DEG approximately with respect to the yz-plane, so that the image-light ray reflected from the first mirror is reflected by the second mirror again so as to enter the screen with the optical axis being incident on the substantial center of the screen and substantially perpendicular to the screen. Thereby, the positional adjustment of an optical system constituting a projector is facilitated and also the apparatus is miniaturized. <IMAGE> |
