| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a compact projection optical system displaying an image with a wide view angle clearly as a remote image, and to provide a visual display apparatus using the same. <P>SOLUTION: In the projection optical system 4 for projecting an image being displayed on an image display element 3, the display surface of the image display element 3 and the projection surface of the projection optical system 4 are decentered in the Y-Z cross section and the projection surface is formed by means of a circular-arc-shaped curved surface with the chord thereof directed to the side of the projection optical system 4 in the X-Z cross section and the projection optical system 4 has at least a rotationally asymmetric corrective optical surface 5 for correcting the distortion of the image. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
