| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a projection type image display device selectively adaptable to the display output of multiple images and the display output of a single image. <P>SOLUTION: A projection optical system for enlarging and projecting image information on a primary image surface modulated by an image modulation element, onto a screen serving as a secondary image surface includes: a first optical system L1 for forming the image information on the primary image surface into an intermediate image; a second optical system L2R corresponding to a single image, which displays and outputs the single image onto the screen by enlarging and projecting the intermediate image; second optical systems L2ta, L2Tb corresponding to a plurality of images, which display and output a plurality of images onto the screen by enlarging and projecting the intermediate image; and optical path switching mechanisms WR, PBS for selectively guiding a luminous flux from the first optical system L1 to the second optical system L2R corresponding to the single image or to the second optical system L2Ta, L2Tb corresponding to the plurality of images. <P>COPYRIGHT: (C)2010,JPO&INPIT |
